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RE: Dynaco 400 amplifier problems,

Could be one of those "whatever we have in the parts warehouse" kind of things that Dynaco was famous for. I've had three of those, too. Two of them, I fixed for "owners" who never reclaimed them. After looking at them for too long, with no responses from registered letters sent to the owners, I took them home and used them myself. After about ten more years I sold them off and as far as I know, they are still running. The one I still have, and which drives the woofers in my home system, was a Dynaco accommodation sale of a factory wired unit; it is from the very first months of Stereo 400 production (early enough that the Whisper FanĀ® kit was not yet available) and it still has its original ceramic fuses, despite being worked on twice for bad transistors in the Class A amplifier section, stem-to-stern capacitor upgrades in the audio path, and a complete bypass of the PC-29 board.


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