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#1
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Resurrecting a 1219 DUAL Turntable
Hi All,
I have taken my 1219 Dual out of a closet with the intention of recording a few hundred 33rpm records. Mechanically it works fine but electrically is sems to be dead. The connector on the end of the output wires was an old antique, and the cord was looking doubtful, so I replaced it with one that had two RCA connectors. I had to solder two spade connectors to the wires to connect into the turntable socket. I loaded a record and it went through all the correct mechanical motions but there was no sound out. I connected the DUAL's 2 output wires to a Sony amplifier that had speakers attached - still no sound - and then directly to the Audio In on the back of my computer - also no sound. I connected the output wires of a tape unit first to the amplifier and then to the rear of my computer and there was sound both times, so the problems is with the turntable. I checked the continuity of the output cables by connecting a multimeter to each RCA connector and the corresponding contact on the arm - with the cartridge removed. Each was continuous. Then I checked the continuity of the two inner ground contacts at the rear of the cartridge with the Dual's ground connector, which was attached to the shell of the amplifier. Continuity was present. Is it reasonable to assume that the cartridge has gone belly up? The stylus appears to be ok. The transparent cover that came with the unit was in place for years, so damage to the cartridge from storage is very unlikely. Old age possibly? Opinions appreciated. TIA RF |
#2
Posted to rec.audio.misc
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Resurrecting a 1219 DUAL Turntable
RF wrote:
Hi All, I have taken my 1219 Dual out of a closet with the intention of recording a few hundred 33rpm records. Mechanically it works fine but electrically is sems to be dead. The connector on the end of the output wires was an old antique, and the cord was looking doubtful, so I replaced it with one that had two RCA connectors. I had to solder two spade connectors to the wires to connect into the turntable socket. I loaded a record and it went through all the correct mechanical motions but there was no sound out. I connected the DUAL's 2 output wires to a Sony amplifier that had speakers attached - still no sound - and then directly to the Audio In on the back of my computer - also no sound. I connected the output wires of a tape unit first to the amplifier and then to the rear of my computer and there was sound both times, so the problems is with the turntable. I checked the continuity of the output cables by connecting a multimeter to each RCA connector and the corresponding contact on the arm - with the cartridge removed. Each was continuous. Then I checked the continuity of the two inner ground contacts at the rear of the cartridge with the Dual's ground connector, which was attached to the shell of the amplifier. Continuity was present. Is it reasonable to assume that the cartridge has gone belly up? The stylus appears to be ok. The transparent cover that came with the unit was in place for years, so damage to the cartridge from storage is very unlikely. Old age possibly? Opinions appreciated. TIA RF Hello, Are you feeding the turntable into a PHONO input? Newer amps may not have one. Phono cartridges have much lower output than other sources, and require EQ to sound right. You might need a phono preamp. There is also the possibility that you still have some wiring or connection issues, less likely (though possible) is that the cartridge is bad Regards, Tim Schwartz Bristol Electronics |
#3
Posted to rec.audio.misc
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Resurrecting a 1219 DUAL Turntable
RF wrote:
Hi All, I have taken my 1219 Dual out of a closet with the intention of recording a few hundred 33rpm records. Mechanically it works fine but electrically is sems to be dead. The connector on the end of the output wires was an old antique, and the cord was looking doubtful, so I replaced it with one that had two RCA connectors. I had to solder two spade connectors to the wires to connect into the turntable socket. I loaded a record and it went through all the correct mechanical motions but there was no sound out. I connected the DUAL's 2 output wires to a Sony amplifier that had speakers attached - still no sound - and then directly to the Audio In on the back of my computer - also no sound. I connected the output wires of a tape unit first to the amplifier and then to the rear of my computer and there was sound both times, so the problems is with the turntable. I checked the continuity of the output cables by connecting a multimeter to each RCA connector and the corresponding contact on the arm - with the cartridge removed. Each was continuous. Then I checked the continuity of the two inner ground contacts at the rear of the cartridge with the Dual's ground connector, which was attached to the shell of the amplifier. Continuity was present. Is it reasonable to assume that the cartridge has gone belly up? The stylus appears to be ok. The transparent cover that came with the unit was in place for years, so damage to the cartridge from storage is very unlikely. Old age possibly? Opinions appreciated. TIA RF Hello, Are you feeding the turntable into a PHONO input? Newer amps may not have one. Phono cartridges have much lower output than other sources, and require EQ to sound right. You might need a phono preamp. There is also the possibility that you still have some wiring or connection issues, less likely (though possible) is that the cartridge is bad Regards, Tim Schwartz Bristol Electronics |
#4
Posted to rec.audio.misc
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Resurrecting a 1219 DUAL Turntable
RF wrote: Hi All, I have taken my 1219 Dual out of a closet with the intention of recording a few hundred 33rpm records. Mechanically it works fine but electrically is sems to be dead. The connector on the end of the output wires was an old antique, and the cord was looking doubtful, so I replaced it with one that had two RCA connectors. I had to solder two spade connectors to the wires to connect into the turntable socket. I loaded a record and it went through all the correct mechanical motions but there was no sound out. I connected the DUAL's 2 output wires to a Sony amplifier Which input ? that had speakers attached - still no sound - and then directly to the Audio In on the back of my computer - also no sound. I connected the output wires of a tape unit first to the amplifier and then to the rear of my computer and there was sound both times, so the problems is with the turntable. The output voltage from a magnetic cartridge is mere millivolts and has to be boosted by a pre-amp that also amplifies the bass frequencies more than the treble (RIAA equalisation). Connecting it to a sound card or input on an amplifier that's not intended for cartidges (the correct type is normally marked 'phono') will very likely be virtually inaudible. You need the right kind of amplifier or a pre-amp unit. Graham |
#5
Posted to rec.audio.misc
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Resurrecting a 1219 DUAL Turntable
"RF" wrote in message . net... Hi All, I have taken my 1219 Dual out of a closet with the intention of recording a few hundred 33rpm records. Mechanically it works fine but electrically is sems to be dead. The connector on the end of the output wires was an old antique, and the cord was looking doubtful, so I replaced it with one that had two RCA connectors. I had to solder two spade connectors to the wires to connect into the turntable socket. I loaded a record and it went through all the correct mechanical motions but there was no sound out. I connected the DUAL's 2 output wires to a Sony amplifier that had speakers attached - still no sound - and then directly to the Audio In on the back of my computer - also no sound. I connected the output wires of a tape unit first to the amplifier and then to the rear of my computer and there was sound both times, so the problems is with the turntable. I checked the continuity of the output cables by connecting a multimeter to each RCA connector and the corresponding contact on the arm - with the cartridge removed. Each was continuous. Then I checked the continuity of the two inner ground contacts at the rear of the cartridge with the Dual's ground connector, which was attached to the shell of the amplifier. Continuity was present. Is it reasonable to assume that the cartridge has gone belly up? The stylus appears to be ok. The transparent cover that came with the unit was in place for years, so damage to the cartridge from storage is very unlikely. Old age possibly? Opinions appreciated. TIA RF As the owner of a Dual 1019, I have been there and done that. You didn't say if you had a magnetic or ceramic cartridge, ceramics don't age well, but it would be strange for both sides of a magnetic to fail. The rubber bits get hard and sound poor, but still have some output. I haven't had the pleasure of a 1219, but on the 1019 the silver contact between the head shell and the tone arm on mine never does well on the first attempt. It is soft and doesn't have enough spring tension to make good contact and the silver tarnishes badly. It tends to heal electrically with the sealing current of an ohmmeter only for one side or other going randomly open during play. Another thing to check some models had a mute switch that shorts out the audio path whenever the tonearm isn't down and playing, two little leaf switches that run on a cam on the large gear that operates the tonearm return mechanism, if the old grease gets stiff it might not move properly. They are good machines, but do require occasional maintenance and lubrication, and if you haven't yet check the rubber drive roller, it has probably gotten a bit hard. Good luck, and post a note when you solve this one. David_____________ |
#6
Posted to rec.audio.misc
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Resurrecting a 1219 DUAL Turntable
Tim Schwartz wrote:
RF wrote: Hi All, I have taken my 1219 Dual out of a closet with the intention of recording a few hundred 33rpm records. Mechanically it works fine but electrically is sems to be dead. The connector on the end of the output wires was an old antique, and the cord was looking doubtful, so I replaced it with one that had two RCA connectors. I had to solder two spade connectors to the wires to connect into the turntable socket. I loaded a record and it went through all the correct mechanical motions but there was no sound out. I connected the DUAL's 2 output wires to a Sony amplifier that had speakers attached - still no sound - and then directly to the Audio In on the back of my computer - also no sound. I connected the output wires of a tape unit first to the amplifier and then to the rear of my computer and there was sound both times, so the problems is with the turntable. I checked the continuity of the output cables by connecting a multimeter to each RCA connector and the corresponding contact on the arm - with the cartridge removed. Each was continuous. Then I checked the continuity of the two inner ground contacts at the rear of the cartridge with the Dual's ground connector, which was attached to the shell of the amplifier. Continuity was present. Is it reasonable to assume that the cartridge has gone belly up? The stylus appears to be ok. The transparent cover that came with the unit was in place for years, so damage to the cartridge from storage is very unlikely. Old age possibly? Opinions appreciated. TIA RF Hello, Are you feeding the turntable into a PHONO input? Newer amps may not have one. Phono cartridges have much lower output than other sources, and require EQ to sound right. You might need a phono preamp. There is also the possibility that you still have some wiring or connection issues, less likely (though possible) is that the cartridge is bad Regards, Tim Schwartz Bristol Electronics Thank you Tim. The Sony receiver/amplifier has a Phono input and that's what I used. I should have reported that in my first post. I'm a bit puzzled that the phono is connected to a ground screw on the Sony but it has a 2-pin plug for its 110v supply. RF |
#7
Posted to rec.audio.misc
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Resurrecting a 1219 DUAL Turntable
Eeyore wrote:
RF wrote: Hi All, I have taken my 1219 Dual out of a closet with the intention of recording a few hundred 33rpm records. Mechanically it works fine but electrically is sems to be dead. The connector on the end of the output wires was an old antique, and the cord was looking doubtful, so I replaced it with one that had two RCA connectors. I had to solder two spade connectors to the wires to connect into the turntable socket. I loaded a record and it went through all the correct mechanical motions but there was no sound out. I connected the DUAL's 2 output wires to a Sony amplifier Thanks Graham. Which input ? The Sony amplifier has a Phono input and that's what I used. I should have reported that in my first post. that had speakers attached - still no sound - and then directly to the Audio In on the back of my computer - also no sound. I connected the output wires of a tape unit first to the amplifier and then to the rear of my computer and there was sound both times, so the problems is with the turntable. The output voltage from a magnetic cartridge is mere millivolts and has to be boosted by a pre-amp that also amplifies the bass frequencies more than the treble (RIAA equalisation). Connecting it to a sound card or input on an amplifier that's not intended for cartidges (the correct type is normally marked 'phono') will very likely be virtually inaudible. The input I used is labeled Phono. You need the right kind of amplifier or a pre-amp unit. It does have the right kind of input connection. I have used it often in the past. Graham |
#8
Posted to rec.audio.misc
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Resurrecting a 1219 DUAL Turntable
"RF" wrote in message
. net Is it reasonable to assume that the cartridge has gone belly up? I've seen this happen. The cartridge that was dead was a Stanton. The stylus appears to be ok. The transparent cover that came with the unit was in place for years, so damage to the cartridge from storage is very unlikely. Old age possibly? Yes. I'd recommend replacing it with a Shure M97xE |
#9
Posted to rec.audio.misc
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Resurrecting a 1219 DUAL Turntable
David Ballinger wrote:
"RF" wrote in message . net... Hi All, I have taken my 1219 Dual out of a closet with the intention of recording a few hundred 33rpm records. Mechanically it works fine but electrically is sems to be dead. The connector on the end of the output wires was an old antique, and the cord was looking doubtful, so I replaced it with one that had two RCA connectors. I had to solder two spade connectors to the wires to connect into the turntable socket. I loaded a record and it went through all the correct mechanical motions but there was no sound out. I connected the DUAL's 2 output wires to a Sony amplifier that had speakers attached - still no sound - and then directly to the Audio In on the back of my computer - also no sound. I connected the output wires of a tape unit first to the amplifier and then to the rear of my computer and there was sound both times, so the problems is with the turntable. I checked the continuity of the output cables by connecting a multimeter to each RCA connector and the corresponding contact on the arm - with the cartridge removed. Each was continuous. Then I checked the continuity of the two inner ground contacts at the rear of the cartridge with the Dual's ground connector, which was attached to the shell of the amplifier. Continuity was present. Is it reasonable to assume that the cartridge has gone belly up? The stylus appears to be ok. The transparent cover that came with the unit was in place for years, so damage to the cartridge from storage is very unlikely. Old age possibly? Opinions appreciated. TIA RF Thanks David. As the owner of a Dual 1019, I have been there and done that. Good news! You didn't say if you had a magnetic or ceramic cartridge, ceramics don't age well, but it would be strange for both sides of a magnetic to fail. The rubber bits get hard and sound poor, but still have some output. It's a Shure M55E. According to: http://www.arcticcorsair.f9.co.uk/au...shure-m55.html it's a magnetic cartridge. I haven't had the pleasure of a 1219, but on the 1019 the silver contact between the head shell and the tone arm on mine never does well on the first attempt. It is soft and doesn't have enough spring tension to make good contact and the silver tarnishes badly. At the top rear of the cartridge there are 4 contacts with a little silvering - solder probably to prevent copper tarnish. The two outer contacts are supposed to connect with the right and left audio channel contacts in the tone arm and the two middle contacts are grounds. I don't see any contacts in the shell at that height. There are four soldered contacts in the tone arm but at a level lower than the cartridge. I pulled off all four contacts from the pins at the rear of the cartridge and pushed them back on again. The four contacts at the top rear of the cartridge I moved gently and found that they were springy and could move in and out a little. I'm puzzled about how they make contact with the tone arm because there is nothing silvered at their level in the arm. There is also a narrow springy contact at the top of the rear middle of the tone arm. It is attached at the top and tapers near the bottom. I think this is probably meant to retain the cartridge in place. I reassembled and attempted to play the record but still no sound. It tends to heal electrically with the sealing current of an ohmmeter only for one side or other going randomly open during play. That location is not too easy to view. I used a small mirror that helped but it doesn't show me any silvered contacts that would mate with the four cartridge contacts. Another thing to check some models had a mute switch that shorts out the audio path whenever the tonearm isn't down and playing, two little leaf switches that run on a cam on the large gear that operates the tonearm return mechanism, if the old grease gets stiff it might not move properly. This switch I would like to find. I take it is the large gear is the plastic (or similar) amber- colored one - about 4"-5" across or thereabouts. Will check it soon. I'm realiy getting tired of taking the turntable out of the box and replacing it. Methinks I'll temporarily remove those three pesky little screws that are always in the way. They are good machines, but do require occasional maintenance and lubrication, and if you haven't yet check the rubber drive roller, it has probably gotten a bit hard. If this is the roller that drives the brass spindle, it is in excellent shape. Firm and flexible. The head moves across the record as it always did in the past. I have no apparent problem with the mechanicals. Good luck, and post a note when you solve this one. David_____________ Thanks again David. I'll keep in touch about it. RF |
#10
Posted to rec.audio.misc
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Resurrecting a 1219 DUAL Turntable
"RF" wrote in message ... David Ballinger wrote: "RF" wrote in message . net... Hi All, I have taken my 1219 Dual out of a closet with the intention of recording a few hundred 33rpm records. Mechanically it works fine but electrically is sems to be dead. The connector on the end of the output wires was an old antique, and the cord was looking doubtful, so I replaced it with one that had two RCA connectors. I had to solder two spade connectors to the wires to connect into the turntable socket. I loaded a record and it went through all the correct mechanical motions but there was no sound out. I connected the DUAL's 2 output wires to a Sony amplifier that had speakers attached - still no sound - and then directly to the Audio In on the back of my computer - also no sound. I connected the output wires of a tape unit first to the amplifier and then to the rear of my computer and there was sound both times, so the problems is with the turntable. I checked the continuity of the output cables by connecting a multimeter to each RCA connector and the corresponding contact on the arm - with the cartridge removed. Each was continuous. Then I checked the continuity of the two inner ground contacts at the rear of the cartridge with the Dual's ground connector, which was attached to the shell of the amplifier. Continuity was present. Is it reasonable to assume that the cartridge has gone belly up? The stylus appears to be ok. The transparent cover that came with the unit was in place for years, so damage to the cartridge from storage is very unlikely. Old age possibly? Opinions appreciated. TIA RF Thanks David. As the owner of a Dual 1019, I have been there and done that. Good news! You didn't say if you had a magnetic or ceramic cartridge, ceramics don't age well, but it would be strange for both sides of a magnetic to fail. The rubber bits get hard and sound poor, but still have some output. It's a Shure M55E. According to: http://www.arcticcorsair.f9.co.uk/au...shure-m55.html it's a magnetic cartridge. I haven't had the pleasure of a 1219, but on the 1019 the silver contact between the head shell and the tone arm on mine never does well on the first attempt. It is soft and doesn't have enough spring tension to make good contact and the silver tarnishes badly. At the top rear of the cartridge there are 4 contacts with a little silvering - solder probably to prevent copper tarnish. The two outer contacts are supposed to connect with the right and left audio channel contacts in the tone arm and the two middle contacts are grounds. I don't see any contacts in the shell at that height. There are four soldered contacts in the tone arm but at a level lower than the cartridge. I pulled off all four contacts from the pins at the rear of the cartridge and pushed them back on again. The four contacts at the top rear of the cartridge I moved gently and found that they were springy and could move in and out a little. I'm puzzled about how they make contact with the tone arm because there is nothing silvered at their level in the arm. There is also a narrow springy contact at the top of the rear middle of the tone arm. It is attached at the top and tapers near the bottom. I think this is probably meant to retain the cartridge in place. I reassembled and attempted to play the record but still no sound. It tends to heal electrically with the sealing current of an ohmmeter only for one side or other going randomly open during play. That location is not too easy to view. I used a small mirror that helped but it doesn't show me any silvered contacts that would mate with the four cartridge contacts. Another thing to check some models had a mute switch that shorts out the audio path whenever the tonearm isn't down and playing, two little leaf switches that run on a cam on the large gear that operates the tonearm return mechanism, if the old grease gets stiff it might not move properly. This switch I would like to find. I take it is the large gear is the plastic (or similar) amber- colored one - about 4"-5" across or thereabouts. Will check it soon. I'm realiy getting tired of taking the turntable out of the box and replacing it. Methinks I'll temporarily remove those three pesky little screws that are always in the way. They are good machines, but do require occasional maintenance and lubrication, and if you haven't yet check the rubber drive roller, it has probably gotten a bit hard. If this is the roller that drives the brass spindle, it is in excellent shape. Firm and flexible. The head moves across the record as it always did in the past. I have no apparent problem with the mechanicals. Good luck, and post a note when you solve this one. David_____________ Thanks again David. I'll keep in touch about it. RF Found this hope it helps picture is worth a thousand words and push that little piece of metal you use to pick up the tonearm, the one on the side of the cartridge shell, toward the rear of the cartridge holder it will arc back about 10 degrees and release the head shell; see manual--- a.. http://www.vinylengine.com/library_m...ted_model=1219 you should see all the contacts, hope this helps David_____________ |
#11
Posted to rec.audio.misc
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Resurrecting a 1219 DUAL Turntable
David Ballinger wrote:
"RF" wrote in message ... David Ballinger wrote: "RF" wrote in message . net... Hi All, I have taken my 1219 Dual out of a closet with the intention of recording a few hundred 33rpm records. Mechanically it works fine but electrically is sems to be dead. The connector on the end of the output wires was an old antique, and the cord was looking doubtful, so I replaced it with one that had two RCA connectors. I had to solder two spade connectors to the wires to connect into the turntable socket. I loaded a record and it went through all the correct mechanical motions but there was no sound out. I connected the DUAL's 2 output wires to a Sony amplifier that had speakers attached - still no sound - and then directly to the Audio In on the back of my computer - also no sound. I connected the output wires of a tape unit first to the amplifier and then to the rear of my computer and there was sound both times, so the problems is with the turntable. I checked the continuity of the output cables by connecting a multimeter to each RCA connector and the corresponding contact on the arm - with the cartridge removed. Each was continuous. Then I checked the continuity of the two inner ground contacts at the rear of the cartridge with the Dual's ground connector, which was attached to the shell of the amplifier. Continuity was present. Is it reasonable to assume that the cartridge has gone belly up? The stylus appears to be ok. The transparent cover that came with the unit was in place for years, so damage to the cartridge from storage is very unlikely. Old age possibly? Opinions appreciated. TIA RF Thanks David. As the owner of a Dual 1019, I have been there and done that. Good news! You didn't say if you had a magnetic or ceramic cartridge, ceramics don't age well, but it would be strange for both sides of a magnetic to fail. The rubber bits get hard and sound poor, but still have some output. It's a Shure M55E. According to: http://www.arcticcorsair.f9.co.uk/au...shure-m55.html it's a magnetic cartridge. I haven't had the pleasure of a 1219, but on the 1019 the silver contact between the head shell and the tone arm on mine never does well on the first attempt. It is soft and doesn't have enough spring tension to make good contact and the silver tarnishes badly. At the top rear of the cartridge there are 4 contacts with a little silvering - solder probably to prevent copper tarnish. The two outer contacts are supposed to connect with the right and left audio channel contacts in the tone arm and the two middle contacts are grounds. I don't see any contacts in the shell at that height. There are four soldered contacts in the tone arm but at a level lower than the cartridge. I pulled off all four contacts from the pins at the rear of the cartridge and pushed them back on again. The four contacts at the top rear of the cartridge I moved gently and found that they were springy and could move in and out a little. I'm puzzled about how they make contact with the tone arm because there is nothing silvered at their level in the arm. There is also a narrow springy contact at the top of the rear middle of the tone arm. It is attached at the top and tapers near the bottom. I think this is probably meant to retain the cartridge in place. I reassembled and attempted to play the record but still no sound. It tends to heal electrically with the sealing current of an ohmmeter only for one side or other going randomly open during play. That location is not too easy to view. I used a small mirror that helped but it doesn't show me any silvered contacts that would mate with the four cartridge contacts. Another thing to check some models had a mute switch that shorts out the audio path whenever the tonearm isn't down and playing, two little leaf switches that run on a cam on the large gear that operates the tonearm return mechanism, if the old grease gets stiff it might not move properly. This switch I would like to find. I take it is the large gear is the plastic (or similar) amber- colored one - about 4"-5" across or thereabouts. Will check it soon. I'm realiy getting tired of taking the turntable out of the box and replacing it. Methinks I'll temporarily remove those three pesky little screws that are always in the way. They are good machines, but do require occasional maintenance and lubrication, and if you haven't yet check the rubber drive roller, it has probably gotten a bit hard. If this is the roller that drives the brass spindle, it is in excellent shape. Firm and flexible. The head moves across the record as it always did in the past. I have no apparent problem with the mechanicals. Good luck, and post a note when you solve this one. David_____________ Thanks again David. I'll keep in touch about it. RF Found this hope it helps picture is worth a thousand words and push that little piece of metal you use to pick up the tonearm, the one on the side of the cartridge shell, toward the rear of the cartridge holder it will arc back about 10 degrees and release the head shell; see manual--- a.. http://www.vinylengine.com/library_m...ted_model=1219 you should see all the contacts, hope this helps David_____________ Thanks again David, especially for the manual. I have already taken off the cartridge many times. That is one great manual. You should see what I was given when I bought mine. It had 7 dinky little drawings and 17 very small photos. Very poor explanations also. Still working on it. Back soon. RF |
#12
Posted to rec.audio.misc
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Resurrecting a 1219 DUAL Turntable
Arny Krueger wrote:
"RF" wrote in message . net Is it reasonable to assume that the cartridge has gone belly up? I've seen this happen. The cartridge that was dead was a Stanton. The stylus appears to be ok. The transparent cover that came with the unit was in place for years, so damage to the cartridge from storage is very unlikely. Old age possibly? Yes. I'd recommend replacing it with a Shure M97xE Thanks Amy for the suggestion. I had and still have my eye on that one. Where to find the best prices? RF |
#13
Posted to rec.audio.misc
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Resurrecting a 1219 DUAL Turntable
RF wrote:
Hi All, I have taken my 1219 Dual out of a closet with the intention of recording a few hundred 33rpm records. Mechanically it works fine but electrically is sems to be dead. The connector on the end of the output wires was an old antique, and the cord was looking doubtful, so I replaced it with one that had two RCA connectors. I had to solder two spade connectors to the wires to connect into the turntable socket. I loaded a record and it went through all the correct mechanical motions but there was no sound out. I connected the DUAL's 2 output wires to a Sony amplifier that had speakers attached - still no sound - and then directly to the Audio In on the back of my computer - also no sound. I connected the output wires of a tape unit first to the amplifier and then to the rear of my computer and there was sound both times, so the problems is with the turntable. I checked the continuity of the output cables by connecting a multimeter to each RCA connector and the corresponding contact on the arm - with the cartridge removed. Each was continuous. Then I checked the continuity of the two inner ground contacts at the rear of the cartridge with the Dual's ground connector, which was attached to the shell of the amplifier. Continuity was present. Is it reasonable to assume that the cartridge has gone belly up? The stylus appears to be ok. The transparent cover that came with the unit was in place for years, so damage to the cartridge from storage is very unlikely. Old age possibly? Opinions appreciated. TIA RF Good morning. One more thought that you should make sure the muting switch is unmuting. with the headshell removed and the turntable off 9arm in rest position) you should read a short on the hot to ground of each phono plug. With the turntable running and the arm over the platter (you can leave the cueing up) it should show open circuit. If you try this with the cartridge installed, you should see the cartridge windings, usually a few hundred to a few thousand ohms. Regards, Tim |
#14
Posted to rec.audio.misc
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Resurrecting a 1219 DUAL Turntable
Tim Schwartz wrote:
RF wrote: Hi All, I have taken my 1219 Dual out of a closet with the intention of recording a few hundred 33rpm records. Mechanically it works fine but electrically is sems to be dead. The connector on the end of the output wires was an old antique, and the cord was looking doubtful, so I replaced it with one that had two RCA connectors. I had to solder two spade connectors to the wires to connect into the turntable socket. I loaded a record and it went through all the correct mechanical motions but there was no sound out. I connected the DUAL's 2 output wires to a Sony amplifier that had speakers attached - still no sound - and then directly to the Audio In on the back of my computer - also no sound. I connected the output wires of a tape unit first to the amplifier and then to the rear of my computer and there was sound both times, so the problems is with the turntable. I checked the continuity of the output cables by connecting a multimeter to each RCA connector and the corresponding contact on the arm - with the cartridge removed. Each was continuous. Then I checked the continuity of the two inner ground contacts at the rear of the cartridge with the Dual's ground connector, which was attached to the shell of the amplifier. Continuity was present. Is it reasonable to assume that the cartridge has gone belly up? The stylus appears to be ok. The transparent cover that came with the unit was in place for years, so damage to the cartridge from storage is very unlikely. Old age possibly? Opinions appreciated. TIA RF Good morning. One more thought that you should make sure the muting switch is unmuting. with the headshell removed and the turntable off 9arm in rest position) you should read a short on the hot to ground of each phono plug. With the turntable running and the arm over the platter (you can leave the cueing up) it should show open circuit. If you try this with the cartridge installed, you should see the cartridge windings, usually a few hundred to a few thousand ohms. Regards, Tim Thank you Tim. With the cartridge removed, and the tone arm in its resting place, I can measure the resistance from each RCA plug to the 4 contacts at the end of the tone arm. From the red RCA plug, the resistance is zero to the left contact on the tone arm - that connects with the red wire on the cartridge. To all the other 3 contacts it is infinity. Same story for the black RCA plug - zero resistance to the contact on the right in the tone arm and infinity to all the other three contacts. I had trouble trying to measure when the arm was over the platter with the cartridge in place. Without the cartridge, the arm just moved to the edge of the platter and returned to its resting place when I started the platter rotating. Ideally I would like to remove the arm but that might create even more trouble. I think I'm in deep enough already. |
#15
Posted to rec.audio.misc
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Resurrecting a 1219 DUAL Turntable - wiring check
RF wrote:
Tim Schwartz wrote: RF wrote: Hi All, I have taken my 1219 Dual out of a closet with the intention of recording a few hundred 33rpm records. Mechanically it works fine but electrically is sems to be dead. The connector on the end of the output wires was an old antique, and the cord was looking doubtful, so I replaced it with one that had two RCA connectors. I had to solder two spade connectors to the wires to connect into the turntable socket. I loaded a record and it went through all the correct mechanical motions but there was no sound out. I connected the DUAL's 2 output wires to a Sony amplifier that had speakers attached - still no sound - and then directly to the Audio In on the back of my computer - also no sound. I connected the output wires of a tape unit first to the amplifier and then to the rear of my computer and there was sound both times, so the problems is with the turntable. I checked the continuity of the output cables by connecting a multimeter to each RCA connector and the corresponding contact on the arm - with the cartridge removed. Each was continuous. Then I checked the continuity of the two inner ground contacts at the rear of the cartridge with the Dual's ground connector, which was attached to the shell of the amplifier. Continuity was present. Is it reasonable to assume that the cartridge has gone belly up? The stylus appears to be ok. The transparent cover that came with the unit was in place for years, so damage to the cartridge from storage is very unlikely. Old age possibly? Opinions appreciated. TIA RF Good morning. One more thought that you should make sure the muting switch is unmuting. with the headshell removed and the turntable off 9arm in rest position) you should read a short on the hot to ground of each phono plug. With the turntable running and the arm over the platter (you can leave the cueing up) it should show open circuit. If you try this with the cartridge installed, you should see the cartridge windings, usually a few hundred to a few thousand ohms. Regards, Tim Thank you Tim. With the cartridge removed, and the tone arm in its resting place, I can measure the resistance from each RCA plug to the 4 contacts at the end of the tone arm. From the red RCA plug, the resistance is zero to the left contact on the tone arm - that connects with the red wire on the cartridge. To all the other 3 contacts it is infinity. Same story for the black RCA plug - zero resistance to the contact on the right in the tone arm and infinity to all the other three contacts. I had trouble trying to measure when the arm was over the platter with the cartridge in place. Without the cartridge, the arm just moved to the edge of the platter and returned to its resting place when I started the platter rotating. Ideally I would like to remove the arm but that might create even more trouble. I think I'm in deep enough already. Hello again. DON'T remove the arm!!! Get the arm over the platter and UNPLUG the turntable from the wall, it will stop spinning. I though you said you had replaced the RCA cables. If you have the original colors, then black is right and white is left. The head shell should be: Red=Right hot Green=Right ground (also commoned to the chassis) White=Left hot Blue = left ground. If you are using the original Dual RCA plugs, then bad ground (often 2-3 ohms or even open) are a common problem. Once you have verified that the wiring to the arm is OK then look at the head shell. On a 1219, the contacts are on the rear edge of the head shell and can either be the early spring metal type or the later spring loaded pins. Corrosion of the contacts and bad crimps of the wires are also common on Dual head shells. If the contacts on your head shell are all at the top, then you have a 10 series head shell forced on to a 12 series turntable, and that won't work. Regards, Tim |
#16
Posted to rec.audio.misc
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Resurrecting a 1219 DUAL Turntable - wiring check
Tim Schwartz wrote:
RF wrote: Tim Schwartz wrote: RF wrote: Hi All, I have taken my 1219 Dual out of a closet with the intention of recording a few hundred 33rpm records. Mechanically it works fine but electrically is sems to be dead. The connector on the end of the output wires was an old antique, and the cord was looking doubtful, so I replaced it with one that had two RCA connectors. I had to solder two spade connectors to the wires to connect into the turntable socket. I loaded a record and it went through all the correct mechanical motions but there was no sound out. I connected the DUAL's 2 output wires to a Sony amplifier that had speakers attached - still no sound - and then directly to the Audio In on the back of my computer - also no sound. I connected the output wires of a tape unit first to the amplifier and then to the rear of my computer and there was sound both times, so the problems is with the turntable. I checked the continuity of the output cables by connecting a multimeter to each RCA connector and the corresponding contact on the arm - with the cartridge removed. Each was continuous. Then I checked the continuity of the two inner ground contacts at the rear of the cartridge with the Dual's ground connector, which was attached to the shell of the amplifier. Continuity was present. Is it reasonable to assume that the cartridge has gone belly up? The stylus appears to be ok. The transparent cover that came with the unit was in place for years, so damage to the cartridge from storage is very unlikely. Old age possibly? Opinions appreciated. TIA RF Good morning. One more thought that you should make sure the muting switch is unmuting. with the headshell removed and the turntable off 9arm in rest position) you should read a short on the hot to ground of each phono plug. With the turntable running and the arm over the platter (you can leave the cueing up) it should show open circuit. If you try this with the cartridge installed, you should see the cartridge windings, usually a few hundred to a few thousand ohms. Regards, Tim Thank you Tim. With the cartridge removed, and the tone arm in its resting place, I can measure the resistance from each RCA plug to the 4 contacts at the end of the tone arm. From the red RCA plug, the resistance is zero to the left contact on the tone arm - that connects with the red wire on the cartridge. To all the other 3 contacts it is infinity. Same story for the black RCA plug - zero resistance to the contact on the right in the tone arm and infinity to all the other three contacts. I had trouble trying to measure when the arm was over the platter with the cartridge in place. Without the cartridge, the arm just moved to the edge of the platter and returned to its resting place when I started the platter rotating. Ideally I would like to remove the arm but that might create even more trouble. I think I'm in deep enough already. Hello again. DON'T remove the arm!!! Get the arm over the platter and UNPLUG the turntable from the wall, it will stop spinning. Thanks Tim for the tip. I though you said you had replaced the RCA cables. The old cable had a large - about 1/2" diameter - German plug with about 5 pins. It didn't fit the amplifier (15 years younger) so I replaced the cord with one that has two RCA plugs, one red, one black. I made sure the red RCA plug was on the same wire as the corresponding red red wire on the cartridge. The Black RCA plug is on the same wire as the catrridge's white wire. With the arm on the rest, continuity tests confirm that these are correct. If you have the original colors, then black is right and white is left. The head shell should be: Red=Right hot Green=Right ground (also commoned to the chassis) White=Left hot Blue = left ground. Looking from the top and front of the cartridge, my wires are from left to right red, green, blue and white - like yours. If you are using the original Dual RCA plugs, then bad ground (often 2-3 ohms or even open) are a common problem. Once you have verified that the wiring to the arm is OK then look at the head shell. Will work on that soon. On a 1219, the contacts are on the rear edge of the head shell and can either be the early spring metal type or the later spring loaded pins. Corrosion of the contacts and bad crimps of the wires are also common on Dual head shells. If the contacts on your head shell are all at the top, then you have a 10 series head shell forced on to a 12 series turntable, and that won't work. My Shure M55E is much more recent than the turntable. The contacts appear to be springy copper with some solder applied at the contact points. They can move in and out of the cartridge a little. More bad news. I have been told that an amplifier that does not buzz when a metal pin is placed (and held) in the phono connection, is probably dead, so I may have to get a new mini amplifier. I guess that should cost less than a repair. Regards, Tim Thanks again for your help. RF |
#17
Posted to rec.audio.misc
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Resurrecting a 1219 DUAL Turntable - wiring check
RF wrote:
Tim Schwartz wrote: RF wrote: Tim Schwartz wrote: RF wrote: Hi All, I have taken my 1219 Dual out of a closet with the intention of recording a few hundred 33rpm records. Mechanically it works fine but electrically is sems to be dead. The connector on the end of the output wires was an old antique, and the cord was looking doubtful, so I replaced it with one that had two RCA connectors. I had to solder two spade connectors to the wires to connect into the turntable socket. I loaded a record and it went through all the correct mechanical motions but there was no sound out. I connected the DUAL's 2 output wires to a Sony amplifier that had speakers attached - still no sound - and then directly to the Audio In on the back of my computer - also no sound. I connected the output wires of a tape unit first to the amplifier and then to the rear of my computer and there was sound both times, so the problems is with the turntable. I checked the continuity of the output cables by connecting a multimeter to each RCA connector and the corresponding contact on the arm - with the cartridge removed. Each was continuous. Then I checked the continuity of the two inner ground contacts at the rear of the cartridge with the Dual's ground connector, which was attached to the shell of the amplifier. Continuity was present. Is it reasonable to assume that the cartridge has gone belly up? The stylus appears to be ok. The transparent cover that came with the unit was in place for years, so damage to the cartridge from storage is very unlikely. Old age possibly? Opinions appreciated. TIA RF Good morning. One more thought that you should make sure the muting switch is unmuting. with the headshell removed and the turntable off 9arm in rest position) you should read a short on the hot to ground of each phono plug. With the turntable running and the arm over the platter (you can leave the cueing up) it should show open circuit. If you try this with the cartridge installed, you should see the cartridge windings, usually a few hundred to a few thousand ohms. Regards, Tim Thank you Tim. With the cartridge removed, and the tone arm in its resting place, I can measure the resistance from each RCA plug to the 4 contacts at the end of the tone arm. From the red RCA plug, the resistance is zero to the left contact on the tone arm - that connects with the red wire on the cartridge. To all the other 3 contacts it is infinity. Same story for the black RCA plug - zero resistance to the contact on the right in the tone arm and infinity to all the other three contacts. I had trouble trying to measure when the arm was over the platter with the cartridge in place. Without the cartridge, the arm just moved to the edge of the platter and returned to its resting place when I started the platter rotating. Ideally I would like to remove the arm but that might create even more trouble. I think I'm in deep enough already. Hello again. DON'T remove the arm!!! Get the arm over the platter and UNPLUG the turntable from the wall, it will stop spinning. Thanks Tim for the tip. I though you said you had replaced the RCA cables. The old cable had a large - about 1/2" diameter - German plug with about 5 pins. It didn't fit the amplifier (15 years younger) so I replaced the cord with one that has two RCA plugs, one red, one black. I made sure the red RCA plug was on the same wire as the corresponding red red wire on the cartridge. The Black RCA plug is on the same wire as the catrridge's white wire. With the arm on the rest, continuity tests confirm that these are correct. If you have the original colors, then black is right and white is left. The head shell should be: Red=Right hot Green=Right ground (also commoned to the chassis) White=Left hot Blue = left ground. Looking from the top and front of the cartridge, my wires are from left to right red, green, blue and white - like yours. If you are using the original Dual RCA plugs, then bad ground (often 2-3 ohms or even open) are a common problem. Once you have verified that the wiring to the arm is OK then look at the head shell. Hi Tim, The RCA cables are new. I had a simple task of removing the old soldered cables and replacing them. I made the measurements with the arm on and off the rest and the results were the same. In both cases, I clipped one lead of my meter to an RCA plug contact and then used the other lead to probe all four contacts. For example, with the meter attached to the red lead, the other probe read 0 ohms for the left (looking from the front of the arm) and infinity for all the others. Similarly when I clipped the black RCA plug to the black lead of the meter, I had zero ohms with the red lead on the right (white) contact and infinity to all the other three contacts. Sounds like something is not quite right. TIA RF |
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