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

Model 41-250 dual 370 pf cap
#1

Well, I replaced the dual 370pf dual cap in the oscillator circuit with two individual 360pf caps and now the oscillator doesn't oscillate on the push button position of the band switch. On all other bands the cathode of the oscillator is grounded and the dual cap does not come into play. I measured to old cap and besides the 370pf between each of the sections and ground, there is a 170pf between the two 370pf cap sections. So, I added a cap between the the two individual replacement caps, and now I get a oscillator signal on the push button band. Has anyone else who has worked on this or similar models, and replaced the dual 370pf cap with separate units, had the same problem? Thanks.

Harv
#2

Never had that problem. Replaced lots of 'em. Sure you have the caps connected correctly?

Kind regards,
Terry
http://home.comcast.net/~suptjud/
"Life is simpler when you plow around the stump."
#3

They are in correctly, so I was surprised when it did not work. I thought that maybe Philco used the coupling between the two sections to provide coupling for the oscillator, since the cap is quite large for a 370pf unit.

Harv
#4

Your question Terry led me to take a third look at how I replaced the cap, and sure enough I had an incorrect connection. Works OK now. I guess my eyes are not as good as they used to be. Appreciate your comments.

Harv




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Need Help to ID this radio 11 tube Philco
Philco 16 is not intimidating at all. Despite being an 11-tuber. 37-116 is indeed intimidating. 16 has good space unde...morzh — 04:11 PM
48-482 rear panel help
Thanks for the responses Gary and Bob. I'm a little surprised that there's no back panel - although I know older Philco'...keithchip — 04:09 PM
48-482 rear panel help
Gary is correct, there was not a rear panel on the 48-482. I restored one of those and its a great sounding radio that ...klondike98 — 03:24 PM
The list of my radio & TV collection!
A little light positivity in our feed... To nostalgic retro music... With English subtitles My new video on the contin...RadioSvit — 02:14 PM
My Philco 37-116 Restore
Ron and Mike I mentioned a 2 meg resistor not on the schematic. I stumbled on a changes note in Riders that mentioned th...dconant — 12:02 PM
Need Help to ID this radio 11 tube Philco
Here you go: Your the code 125Radioroslyn — 11:12 AM
My Philco 37-116 Restore
Hi Ron, Thanks for the input. I think I'm going to call it good enough. It does seem weird I can usually dial in othe...dconant — 08:01 AM
Need Help to ID this radio 11 tube Philco
Welcome, the radio looks intimating 11 tubes, wish you well.Jimradio — 07:49 AM
462ron
Hi Dan, it’s been 10 years since I restored the electronics on my 37-116 so I’m going on some foggy memories. I remember...462ron — 07:37 AM
Need Help to ID this radio 11 tube Philco
Yes the 16B as morzh pointed out. Specifically its the January 1935 model version of the 16B. There are a couple earli...klondike98 — 11:51 PM

[-]
Who's Online
There are currently 2128 online users. [Complete List]
» 2 Member(s) | 2126 Guest(s)
AvatarAvatar

>