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

Molded paper capacitors
#4

Chuck,

I spent some time rummaging around the component section of your site. I think the rectangular components I thought might be micamold paper caps are probably mica caps of body style 6 with pf values and RMA color code.

I traced a few of them down in the schematic as best I could, and they all corresponded to a cap with a pf value that matched the dot pattern.

Then I unsoldered a few and measured the capacitance. The results were not encouraging. Most had values very different from the dot pattern, so I think I'll be replacing them.

While I was looking, I looked over some caps that were similar but lighter colored, reddish instead of brown. Some have a six dot code and some have three. At least some are microfarad range caps that look similar to, but not exactly like, some of the other body types on your mica cap page. Two of them had "MFD" and "Type 2" stamped on the body near the 3 dots. I might need to puzzle the values out from your table or else find them on the schematic.

I had been hoping that I could leave the micas alone, but after I read some old posts on the subject, I guess I'll replace them, too.

The radio plays well and is sensitive on all bands, so I might take my time getting to this chore. With replacing rubber wires and figuring out what to do with an open push-button coil, I have plenty to keep me busy!

Thanks for your help.

John Honeycutt


Messages In This Thread
Molded paper capacitors - by Raleigh - 06-20-2007, 01:24 PM
[No subject] - by Chuck Schwark - 06-20-2007, 01:40 PM
[No subject] - by Raleigh - 06-20-2007, 01:56 PM
[No subject] - by Raleigh - 06-20-2007, 11:50 PM
[No subject] - by Poston Drake - 07-02-2007, 10:16 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
PT 6 chassis screws size???
Hello bridKarl, that sounds right or maybe 8/32 . Sincerely Richardradiorich — 01:00 AM
PT 6 chassis screws size???
Have this done except for missing chassis screws. It looks like 1 inch 6/32 sheet metal screw may work but can anyone s...bridkarl — 10:32 PM
Philco model 38 code 121 not receiving signal.
Hello Stormlord, Well done on rewinding that coil it turned fairly good for your first one. Sincerely Richardradiorich — 09:12 PM
Philco model 38 code 121 not receiving signal.
Well here it is. It ain't pretty, but hopefully it'll work. I checked it with my DMM on continuity and it keeps and r...Stormlord5500 — 08:56 PM
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

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

>