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RE: Can someone please identify this mechanism?

Posted by Crazy Dave (A) on November 9, 2016 at 10:23:40

In Reply to: Can someone please identify this mechanism? posted by lukedileo2@gmail.com on November 8, 2016 at 18:18:48:

It is a Williamson Amp which undoubtably has a Williamson Circuit, which is a circuit designed to have low measured distortion. It uses 2 6SN7's driving triode wired output tubes KT66 tubes with global negative feedback. I have a mono Radio Craftsman version of this. I have read that Williamson designed it as a "Laboratory" amp. Perhaps that is why output hookups look very strange to me. Input is a regular RCA female.

I was not aware that DTN Williamson actually manufactured amps, but his article in Wireless World is quite famous. I am not sure what to make of the label. It certainly would be a find if it was actually made by Williamson himself. You should research the address. This is still a popular DIY design.

Dave

• https://en.wikipedia.org/wiki/Williamson_amplifier   (Open in New Window)

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