The Amp Garage

Sorry to hit a dead thread but thanks very much for this schematic and description of how you solved your problem. I had a very similar issue: my variac didn't start humming or anything but I was clearly not seeing the full current on the PZEM-021 and I knew when I was following the directions from ...

I am currently salvaging a large 1890 vintage pipe organ that was shipped to the west coast from Wisconsin in the mid 1980s and has been in storage ever since. The majority of its 786 pipes will be used for new builds or other organ restoration projects but all the largest pipes will likely be knock...