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#1
Posted to rec.audio.tubes
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Sondex Valve Amplifier
I have a Sondex valve amplifier with matching solid
state pre-amp. It uses 4 KT88s and I believe it is the last of the line from Radford Audio. Does anyone have any information about this amp or where I can find some -as I gather only very few wewre made. In particular information on adjusting grid bias would be helpful. Each channel has two terminals ondernearth two pots and a statement that "grid bias should be set to 2V". It is currently operating on one channel only - swapping the valves over indicated that they were not the problem/. It is not very often you come across equipment where nothing can be found on the net!! If anyone has instructions/circuit diagrams etc on paper, I would willingly pay for a photocopy and postage. Please email me direct on if you have any information! If the ex Sondex specialist from Bristol still visits this group please get in touch Regards David |
#2
Posted to rec.audio.tubes
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Sondex Valve Amplifier
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#3
Posted to rec.audio.tubes
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Sondex Valve Amplifier
Try http://www.radfordaudio.co.uk/
I have Radford speakers that need help. Good luck, let me know how you make out I have a Sondex valve amplifier with matching solid state pre-amp. It uses 4 KT88s and I believe it is the last of the line from Radford Audio. Does anyone have any information about this amp or where I can find some -as I gather only very few wewre made. In particular information on adjusting grid bias would be helpful. Each channel has two terminals ondernearth two pots and a statement that "grid bias should be set to 2V". It is currently operating on one channel only - swapping the valves over indicated that they were not the problem/. It is not very often you come across equipment where nothing can be found on the net!! If anyone has instructions/circuit diagrams etc on paper, I would willingly pay for a photocopy and postage. Please email me direct on if you have any information! If the ex Sondex specialist from Bristol still visits this group please get in touch Regards David |
#4
Posted to rec.audio.tubes
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Sondex Valve Amplifier
In furtherance, I need help on a Melos TM90-st valve amp, also using
4 KT 88's, using the Radford Studio 90 loudspeakers. I have had no luck in a schematic, but have made progress to replacing 2 resistors and 1 diode so that 1 of the 3 fuses doesn't burn out anymore. When the amp is turned on, in 1 minute one KT 88 gets fire red (Brand new Electro Harminex valves) and 1 6LU8 does the same thing. I turned it off and that's how it sits. Both these tubes are on the same circut, left bank. Any suggestions as to where I go from here???? Regards, Tony..... "Tony Pike" wrote in message news:q5y7h.11851$gy2.228@edtnps90... Try http://www.radfordaudio.co.uk/ I have Radford speakers that need help. Good luck, let me know how you make out I have a Sondex valve amplifier with matching solid state pre-amp. It uses 4 KT88s and I believe it is the last of the line from Radford Audio. Does anyone have any information about this amp or where I can find some -as I gather only very few wewre made. In particular information on adjusting grid bias would be helpful. Each channel has two terminals ondernearth two pots and a statement that "grid bias should be set to 2V". It is currently operating on one channel only - swapping the valves over indicated that they were not the problem/. It is not very often you come across equipment where nothing can be found on the net!! If anyone has instructions/circuit diagrams etc on paper, I would willingly pay for a photocopy and postage. Please email me direct on if you have any information! If the ex Sondex specialist from Bristol still visits this group please get in touch Regards David |
#6
Posted to rec.audio.tubes
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Sondex Valve Amplifier
On Mon, 27 Nov 2006 03:39:38 GMT, "Tony Pike"
wrote: Melos TM90 Only thing I could find on it... http://www.diyaudio.com/forums/showthread/t-87249.html |
#7
Posted to rec.audio.tubes
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Sondex Valve Amplifier
Thanks J.P. , will look into it.
"J.P." wrote in message ... On Mon, 27 Nov 2006 03:39:38 GMT, "Tony Pike" wrote: Melos TM90 Only thing I could find on it... http://www.diyaudio.com/forums/showthread/t-87249.html |
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