jazzrhodes10
Member
This weekend has brought my first foray into the world of tubes. And I must say I certainly am not going back any time soon. However I really need help.
I picked up a old Martel FAX-150c reciever for 65.00 locally off of craigslist. He said it worked but sold it as is. So I get it home hook it up and it sounds beautiful, despite the left channel being a little softer and less dynamic sounding. And in about 20 minutes, by the time it really warms up, the sound becomes saturated and it begins to distort.
It still has the original 40 plus year old caps, so obviously it would probably me a good idea to replace those, but would that cause the distortion? Would it require new tubes too after all these years? Is there anywhere to find a schematic? and what is this re-biasing all about?
Thank you so much for your time.
P.S. I'm working on getting some pictures up.
I picked up a old Martel FAX-150c reciever for 65.00 locally off of craigslist. He said it worked but sold it as is. So I get it home hook it up and it sounds beautiful, despite the left channel being a little softer and less dynamic sounding. And in about 20 minutes, by the time it really warms up, the sound becomes saturated and it begins to distort.
It still has the original 40 plus year old caps, so obviously it would probably me a good idea to replace those, but would that cause the distortion? Would it require new tubes too after all these years? Is there anywhere to find a schematic? and what is this re-biasing all about?
Thank you so much for your time.
P.S. I'm working on getting some pictures up.
The can caps have terminals sticking out of them underneath the chassis. You want to create a circuit between each of those terminals, and the actual can (which is usually negative). Like stated above, you can make that circuit a lightbulb, resistor, or anything else that conducts electricity (like you).