Hello from Amsterdam, the pandemic pushed me to this...

hello everyone.

I am new to this community and new to tinkering with audio electronics.
In the middle of the pandemic, I was looking for a hobby to do at home and things got out of hand. I now own a number of broken NAD pre-amps and amps. Here is the list

NAD 1020 series 20

The phono output was not working in the right channel. Decided to recap and now the right channel is super faint and scratches when the volume is almost 3/4 up. (this goes with the 2040 below)

NAD 3020 series 20

This is my total failure, it was working find decided to recap and now it is all over the place,

NAD 2040

Have not tested it yet

NAD 214

Was working fine then the right channel started fading in and out (not sure if it is this or the pre-amp)

NAD 106

Need to test but it started having a very low noise in the transformer so it may be this and not the 214.

The question is what forum should I post questions for these units?
Thank you

Hopefully, you all can help me become better at this. :wave: