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
Gilfillan Brothers Car Radio?
Hi everyone,  Special thanks to Joe Rossi for tracking down this obscure radio and thanks to others who took up the hun...Antipodal — 08:15 PM
trying to identify this wire type
Here's one source for your wire of many. Take care and BE HEALTHY! Gary P.S. Can't get the right color you need? I ...GarySP — 06:40 PM
trying to identify this wire type
...and modern wire of the appropriate gauges and insulation V-rating (300V minimum, usually shown right on the wire) is ...morzh — 05:47 PM
1930s Stromberg-Carlson Tombstone Radio need help identifying model number
I have a question about this radio, is there anyone that has access to this radio that has an intact unmolested speaker ...captainclock1988 — 04:28 PM
1930s Stromberg-Carlson Tombstone Radio need help identifying model number
Well what makes me confuse all of those companies is that all three of those companies (Setchell-Carlson, Stromberg-Carl...captainclock1988 — 04:21 PM
trying to identify this wire type
The red wire is rubber covered wire. The others are cotton braid over rubber often in colors or a tracer, also strand...Chas — 02:43 PM
trying to identify this wire type
Greetings Phorum members, Hope you can help me identify this type of wire in the photo I have attached.  I am not sure ...georgetownjohn — 01:53 PM
Philco 60 Squealing
All correct shields must be in place, all tubes correct no subs of any kind. Check any soldered, riveted ground conne...Chas — 01:24 PM
Philco 60 Squealing
I have recapped and replaced out of tolerance resistors and so on. Radio plays nicely on fairly strong stations. The pro...dconant — 10:55 AM
Philco 46-420 Code 121 Reception issues
Welcome Eric, I agree with Bob and far as the two main electrolytic filter capacitors did you change them yourself or w...radiorich — 11:43 PM

[-]
Who's Online
There are currently 3118 online users. [Complete List]
» 1 Member(s) | 3117 Guest(s)
Avatar

>