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

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Power supply design needed from master designer Terry
#1

About 5 years ago, Terry supplied me with a great power supply for a Philco Farm set...

   

This past Spring I was gifted a Silvertone model 4640 battery set and thought I'd be able to build another power supply like the above for it. There's just one problem, as you'll see on the schematic below... (besides the 5 bias cells I marked in yellow)

   

This set uses a vibrator supply for the "B". So unless I eliminate that vibrator supply altogether, this power supply design won't work.

I'm leaning towards just eliminating the vibrator supply box altogether, and using the above supply design from Terry. That would eliminate the troublesome vibrator (which may not be any good anyhow).

If I'm able to restore the vibrator supply I guess I just need to feed the radio 6VDC starting with a 120:6 filament transformer? Does AES have one of these?

Maybe Terry can sketch something up or revise the above that would work with this radio? (Happy New Year, Terry!)

Thanks!

Greg V.
West Bend, WI
Member WARCI.org


Messages In This Thread
Power supply design needed from master designer Terry - by NostalgiaRadioTime - 01-02-2022, 01:33 AM



Users browsing this thread: 3 Guest(s)
[-]
Recent Posts
B&K 1077B no video
Hello Tim, I would if it's a leaky Capacitor So are all 3 of those B- voltages low then ? Sincerely Richardradiorich — 01:55 AM
B&K 1077B no video
I found a schematic and think I have the problem traced down to the minus power supply. I have very low voltages that go...TV MAN — 12:41 AM
RCA 15X
I'd try replacing the bulb first and if that doesn't do it, then change the 35Z5 and see if the problem goes away.NostalgiaRadioTime — 12:28 AM
B&K 1077B no video
Hello Tim, I have that exact unit in my shop too plus a Sencore unit there are times I like one or other !!. Sincerely...radiorich — 11:07 PM
RCA 15X
Everthing goes at once, maybe it's the cold weather, I have had 2 dial strings break and no my little RCA is having dial...Paul Philco322 — 10:26 PM
Philco 91 Schematic
Hi Dan, I can't explain this specific resistor but I have seen the use of a switch to apply B+ voltage to screen gri...RodB — 09:36 PM
6TPZ and 5TPO Radio Help
I suspect it's been repaired before. And I suspect whoever repaired it, wanted to re-use old transistors' pin stubs in o...morzh — 09:24 PM
B&K 1077B no video
Thanks Rich! I'll take a look and see what he has. I know there's more modern equipment to be had, but this one I know a...TV MAN — 09:11 PM
B&K 1077B no video
Hello Tim, Here is a link to restoration of one on Phil's old radios site ! Sincerely Richard bk1077bradiorich — 09:01 PM
6TPZ and 5TPO Radio Help
I'm a little befuddled on this one. Should X5 and X4 be tied together like this?  It looks like someone added this at so...R3Sons — 07:33 PM

[-]
Who's Online
There are currently no members online.

>