A freshly rebuilt piece of equipment turns on for the first time. [1800x1350 - 154KB]

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No fun, I want the video/audio of that "spinning/warming up".

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There's no audio, it's a piece of test equipment. It just glows.

I'll see what I can do with a video. I have a little more work to do before it's ready to be put into service.

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Fair enough. I have seen some old gear powered up with a nice "thunk" a bit of a buzz and a hum. Something you have to see yourself. I am sure you have been around that plenty. It's oddly pleasant.

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The audio test amp I have kind of does that. It fades up from nothing to MMMMMMMMMMMMMMMMMMMMMMMM as the tubes warm up.

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Have you replaced the caps?

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I replaced everything in the device except for the transformer, meter, and panel switches.

Leaky paper capacitors and drifting carbon comp resistors make for a poor performer.

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(edited )

Here's the chassis before potentiometer replacement: https://pic8.co/sh/0J2blG.jpg

Here's what I started with: https://pic8.co/sh/XRXra9.jpg

The pots specified by Heathkit don't work in the circuit - the original builder changed some of the bands out for 5k as opposed to 200 ohm devices. Even that wasn't correctly correct, I need a 10k for one of the bands in order to dial it in properly.