Quote:
Originally Posted by 1966C10
I have been working on an Olson RA524 tube FM stereo tuner and the AM214 stereo tube amplifier (uses 2 12ax7 and 4 6BM8 tubes) - anyone have any schematics or other info on these units? I have asked on the audiokarma site already but there doesn't seem to be a whole lot of info on these units.
Thanks
Rick
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Just judging by that tube lineup and the fact that it's Olson branded probably means that both the amp and tuner are of Japanese origin. Olson re-branded a lot of stuff made by Pioneer and Trio-Kenwood in the 60's. Could you post a photo of the units, and possibly one underneath the chassis?
If the units are Japanese than
ALL of the capacitors will need to be replaced. Japanese manufacturers used gray tubular ELNA or Suzuki oil filled capacitors that seem to have about a 100% failure rate with age. The either go leaky or dead short. I've never had a japanese made tube Hi-Fi component that worked on it's original nonpolar oil caps. The electrolytic filter cans are sometimes a different story. I've had a couple of Pioneer tube receivers and a couple of Olson re-branded Trio-Kenwood FM tuners. Both needed a full recap but worked perfectly after I took care of that.