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: 1 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
Yes, 57 is an electrolytic cap that should be 12 mfd 400 volts according to the parts list from the Phorum library schem...RodB — 06:01 PM
Philco 42-345 Restoration/Repair
Looks like if I am reading it correctly it looks like the silver capacitor#57 that appears to be a replacement is of a l...osanders0311 — 05:09 PM
Philco model 38 code 121 not receiving signal.
Thanks Arran. Yeah this plastic is pretty thin. It's a little thinner than the original stuff. It kinda reminds me of p...Stormlord5500 — 04:37 PM
Testing a speaker and output transformer Trutone A2-G
The equivalent of one short turn is basically the same as that of a shorted load. If it is the primary's turn, then the ...morzh — 03:53 PM
Testing a speaker and output transformer Trutone A2-G
I've never had an output transformer become shorted, the failure mode is usually an open primary, or in a center tapped ...Arran — 03:52 PM
Philco model 38 code 121 not receiving signal.
As long as the plastic sheeting isn't too thick, I think that the thickness of photographic film would be just about rig...Arran — 03:19 PM
Philco model 38 code 121 not receiving signal.
Well why not! :lol:Stormlord5500 — 03:14 PM
Philco model 38 code 121 not receiving signal.
Good luck next thing you know you will be winding coils just for the fun of it. DavidDavid — 11:29 AM
Testing a speaker and output transformer Trutone A2-G
morzh Short-circuited turns can be considered as a half-dead transformer. But on this case transformer will hot and s...Vlad95 — 11:01 AM
Testing a speaker and output transformer Trutone A2-G
I am not sure how a transformer could be weak. It could be inadequate, but only when you replace the original with somet...morzh — 09:56 AM

[-]
Who's Online
There are currently 2181 online users. [Complete List]
» 1 Member(s) | 2180 Guest(s)
Avatar

>