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Coffee can test
Well, there were lots of #5 cans at the grocery, but they were made of paper. I thought this might be a bad idea. I found only one metal can the right size. It was decaffeinated off brand coffee. I don't see the point without caffeine.
I tried it on the Sylvania that I have working that has its aluminum can. The coffee can is a bit longer, but I didn't trim it down because with the OEM can there are 6Y6's that are too long to fit and the cap of the 1B3 is very close.
I swapped the cans back and forth to make sure there wasn't any warm-up effect biasing the measurements.
With the OEM can I measured 9.75KV. With the steel can I measured 8.98KV. I should have tried adjusting the trimmer capacitor, but I spent so much time getting it where I wanted it I didn't want to disturb it. The steel can might be causing losses, or it might only have shifted the frequency.
When I restore the 1-125 I might use it because after painting it black, it'll look pretty original. If it causes problems I'll make one out of aluminum, but it won't be as pretty.
John
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