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

Philco 37-690 C134, 134A descrepancy (Discriminator)
#1

Hi to all!
Been lurking for quite awhile reading all the great posts when I finally have a question for the expertsIcon_angel
While recapping C134, 134A I noticed the cap design doesn't match the schematic.
There are three wires from the metal canned cap mounted on top of chassis wired below.
Brown, red and White/ Black stripe wires and common ground to the metal can itself.
Attached is a diagram I made up to more easily see the problem.
   
   
Anyone found this additional cap in their rebuild?
camman
#2

I would tend to replace what is there, a .22 could sub for the two .1 paralleled, and a .1 for the othr one. Use 630 volt types so you do not have to keep so many differrent ones around. The three should easily fit in the old can. Changes, doeumented or otherwise, were often done in production.
#3

(03-19-2012, 02:50 PM)codefox1 Wrote:  I would tend to replace what is there, a .22 could sub for the two .1 paralleled, and a .1 for the othr one. Use 630 volt types so you do not have to keep so many differrent ones around. The three should easily fit in the old can. Changes, doeumented or otherwise, were often done in production.
Thanks codefox1,
This appears to be an early unit with a couple "update" resistors missing.
I think I will keep all existing wires as designed, too.
Yes, I always use 630V caps. Like you said....
no reason not to!
camman





Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
New Philco Repair Bench
I am sure this is the archive, and not the Chuck's site.morzh — 09:50 PM
Made mistake & did not label connection
It's not like we are good friends with that wire and can tell it from other ptetty identical looking wires. Why'n't you...morzh — 09:49 PM
Made mistake & did not label connection
I'm not sure why that wire wasn't covered in the video. I'm pretty sure the 6A8 won't work until that pin is grounded. Y...RodB — 09:47 PM
Made mistake & did not label connection
You'll have to forgive me, I am not sure what you mean.  Can you explain what you are really saying.  If anyone does not...georgetownjohn — 08:05 PM
Made mistake & did not label connection
Those are details better left to the ones who know. Maybe you disconnected the wrong end of the wire.RodB — 06:22 PM
Made mistake & did not label connection
Maybe this is starting to make some sense in my hard head.  Is this why the wire in question was not in the great Ron Ra...georgetownjohn — 04:34 PM
Made mistake & did not label connection
I was correct with the 6A8 pin connection's, 7 and 8 are connected to ground as well as the tube shield (the broken line...RodB — 02:41 PM
Made mistake & did not label connection
What does the dotted line representing that surrounds the tube in the schematic?georgetownjohn — 02:17 PM
Made mistake & did not label connection
Hello John, I have been there either label got lost or was not labeled ! Sincerely Richardradiorich — 02:15 PM
Made mistake & did not label connection
Sorry, it is a Philco 37-640.  Does that help?--Johngeorgetownjohn — 02:14 PM

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

>