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If anyone has a copy of the manual for this old amplifier I'd appreciate a copy.? Even just the schematic diagram would be appreciated.? I have had this amplifier for years and use it once in a while.? ?There's a DC offset on the output now but appears to have low distortion.? ? Ran on mercury batteries. Now the battery contacts are all corroded so I just connect a power supply to the test sockets.? ?Has germanium transistors and I think it is '60's vintage.? 10 Hz to 1 MHz is its frequency range and has 20 dB and 40 dB selectable gains.

I did check the files.??

Thanks!

Pete??