WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.

Heathkit AA-40 or AA-121

Thread starter panheadchopper
Start date 2011-02-05 2:49 am

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panheadchopper

2011-02-05 2:49 am

2011-02-05 2:49 am

#1

I'm in need of the schematic for either the Heathkit AA-40 or AA-121.... I here they're the same.

vinylkid58

2011-02-05 4:51 am

2011-02-05 4:51 am

#2

There is a AA-121 manual with schem. on the hifiengine. You'll need to register for the download. The quality isn't the best, but it's free.😀

Heathkit AA-121 | Owners Manual, Service Manual, Schematics, Free Download | HiFi Engine

jeff

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