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Power supply design needed from master designer Terry
#8

Yes, I got lucky and found a P-T292 transformer so that's going to be a big help. So just use the 5K pot and dial it down to 6V?

And just to verify my brain is still functioning in 2022:

A - & B - are both to chassis ground?

A + to off / on switch?

B + to the positive side of the 12 MFD e-cap (C31)?

That should work just fine with the vibrator supply disconnected (I'll probably leave the box bolted on top of the chassis for "show") and will work with the existing PS design from 2017.

Tonight I freed up the tuning mechanism which was froze tight. A few well placed small squirts of Kroil did the trick.

I also took out the 5 bias cells and checked them for voltage. I got nothing on them. So I boiled some water, and dropped them in. Yes, they bubbled like crazy for a few seconds. I left them cool in the water a bit, took them out and set them on a paper towel until the water disappeared inside. Then rechecked them. Each now measured .87 v. So it did something. Not quite the 1.5 v I was expecting but better than nothing.

Greg V.
West Bend, WI
Member WARCI.org


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RE: Power supply design needed from master designer Terry - by NostalgiaRadioTime - 01-03-2022, 12:56 AM



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