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

Help with ID for Philco capacitor
#1

Hi,
A friend of mine is rebuilding a Philco 630 (1936). there is a paper capacitor, rather large, labeled 30-4134S. It is labeled Philco.
Can anyone tell us the value of the capacitor. It doesn't seem to show in the schematic but looks like it's been there for a long long time. It's on the input (B+) side of the shadow meter.
Thanks,
Mark in Prescott
#2

OK, we found that the Philco 30-4134 is a .25uf, 400V paper capacitor. Does the suffix "S" have any significance?
Also, can anyone venture a guess why a 0.25uf cap is in the shadow meter circuit? It looks untouched from when the radio was new as nothing had been done to this set. That cap just doesn't show up in a 630 schematic.

Thanks (for Doug)
Mark in Prescott
#3

I have no idea. Sorry. But you should post some pictures of the restoration, as this sounds like an interesting radio.

tractorforum.com *** I reserve the right to be wrong
#4

If the extra capacitor ,(in question),.. you found in your set isnt on the schematic, delete it. Unless you get hum from the B+ thru the shadowmeter coil after full electronic restoration, the .25uf bypass cap most probably isnt necessary at all. Recheck the schematic closely tho. Sometimes, the orig assembly-line techs would use whatever caps they had handy, and if it was quitting-time ( 5:00) pm at the old Philco factory in 1936, anything "spare" could have been used, in weird places indeed!? Ive run across many such scenarios in many mfgrs sets that didnt "sum" with the schematics before also! Hope this info helps.
Best of luck in restoring your vintage Philco! Icon_wink




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Need to purchase some accessories for restoration of my Old Philco Radio
Here is a list of resources found in our online library that you might find useful. Mike's Gobs of Knobs email addres...klondike98 — 01:46 PM
First Radio restoration
Hi Tubeman, Welcome to the Philco Phorum.  Phamily Phriendly Pfun with Phine Pholks Phull of Philco Phacts. (See a p...MrFixr55 — 12:33 PM
First Radio restoration
You could post in the WANTED ADs section here on the Phorum and see if anyone has an RF generator that they want to sell...klondike98 — 11:55 AM
Zenith H725
Good ideas, thank you Arrange and Rich. I have the adhesive aluminum foil already and can try that immediately. More ...EdHolland — 10:18 AM
Graphics for majestic 1050 dial glass.
Murf; I found this thread on the ARF, the first photo has a pretty good view of the dial glass. Regards ArranArran — 01:12 AM
Zenith H725
hello Ed, how about that speacial tape used for ducting it's like foil or how about thin piece of aluminum roof flash...radiorich — 12:19 AM
Zenith H725
Ed; One material that I have seen, but never tried for this was material for making exhaust gaskets, it's similar to ...Arran — 11:42 PM
Zenith H725
I just remembered, I have some hi temp silicone rubber material which could do the trick. Or a piece of FR4 laminate. Th...EdHolland — 08:39 PM
Zenith H725
The PSU filter cap arrived today (thank you USPS!) so I will work on that later. Meanwhile, I have the dial, speaker...EdHolland — 06:42 PM
Philco 610B oscillator wiring
Thanks Terry. After checking my notes I think I recorded about -10v at the 6A7 G4/control grid. The screen grid (G3 &...Tubester — 05:59 PM

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

>