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#1
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Vintage Receiver Problems
I have a pair of vintage receivers, both of which seem to be having the same
problem. Both receivers work wonderfully, but only do so after playing with the volume control for a while. Generally, changing the volume results in various forms of distortion and most notable, the elimination of nearly all mid-bass and bass and eavy distortion to the vocal range. Has anyone ever had similar problems and might know the cause or a way to fix it? Just fyi, the receivers are a Marantz MR255 and an Technics sa-300. Thanks for your help. -Mark |
#2
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Vintage Receiver Problems
Sounds as if the controls need cleaning. Very common problem on older
pieces. There is a technique or two to learn, but the basic process is to use an aerosol cleaner / lubricant designed for the purpose (Caig DeOxit or similar), spray a bit into the control where the relevant contact surfaces are, and work the control back and forth, then repeat. Variations include packing tissue around the control to catch runoff, tilting the piece to allow gravity to help, using an air compressor before and after, etc. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Mark Baglia" wrote in message ... I have a pair of vintage receivers, both of which seem to be having the same problem. Both receivers work wonderfully, but only do so after playing with the volume control for a while. Generally, changing the volume results in various forms of distortion and most notable, the elimination of nearly all mid-bass and bass and eavy distortion to the vocal range. Has anyone ever had similar problems and might know the cause or a way to fix it? Just fyi, the receivers are a Marantz MR255 and an Technics sa-300. Thanks for your help. -Mark |
#3
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Vintage Receiver Problems
"Mark D. Zacharias" wrote in message ...
Sounds as if the controls need cleaning. Very common problem on older pieces. There is a technique or two to learn, but the basic process is to use an aerosol cleaner / lubricant designed for the purpose (Caig DeOxit or similar), spray a bit into the control where the relevant contact surfaces are, and work the control back and forth, then repeat. Variations include packing tissue around the control to catch runoff, tilting the piece to allow gravity to help, using an air compressor before and after, etc. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Mark Baglia" wrote in message ... I have a pair of vintage receivers, both of which seem to be having the same problem. Both receivers work wonderfully, but only do so after playing with the volume control for a while. Generally, changing the volume results in various forms of distortion and most notable, the elimination of nearly all mid-bass and bass and eavy distortion to the vocal range. Has anyone ever had similar problems and might know the cause or a way to fix it? Just fyi, the receivers are a Marantz MR255 and an Technics sa-300. Thanks for your help. -Mark The stuff Mark is talking about is known to any TV repair shop as tuner cleaner, maybe you can find a shop that'll be willing to squirt all your controls for you fairly cheap. If you do it yourself (you can get a can at Radio Shack, although you'll pay about twice what a TV tech does when he orders the same thing under a different name from a parts house), use the little plasic tube that comes with it and don't hold the button down for more than a half second, just a quick burst, then there won't be much runoff to worry about although the only time you need to wipe it up is if you use it like a fire hose. Unplug your gear and let it cool down to room temp to avoid thermal shock, this stuff comes out of the can fairly cold (and of course you need to unplug before taking the cover off anyway). Good luck. e-mail me with questions. |
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