Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

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


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



Users browsing this thread: 4 Guest(s)
[-]
Recent Posts
HiFi (Chifi) tube amp build - but my own design.
It's the other forum. I'm also in DIY, but mostly read there. Honestly, I kinda jumped into this without much thought to...TV MAN — 10:43 AM
Philco 71 Code 125
Hello,  I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM
54C Cabinet Refinish
I started stripping this cabinet before it got super chilly out because I knew I wasn't going to be able to work on ...glyphmon — 11:18 PM

[-]
Who's Online
There are currently 1553 online users. [Complete List]
» 1 Member(s) | 1552 Guest(s)
Avatar

>