1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Threaded Mode
46-1201 - Cap question...
Mr Grumpy
Junior Member
**
Posts: 45
Threads: 8
Joined: Jan 2013
City: Toronto Ontario
#1

10-20-2014, 09:13 PM
Hi all,  long time no post...

I'm working on a 46-1201 radio phono combination and came across an odd capacitor that
I've never seen before.
Keeping in mind that I'm relatively new to all of this,  I've attached the section if the schematic for
this part.  It appears to be a paper capacitor with a coil wrapped around it.

What is it called?  What does it do?  Can I just replace the capacitor and leave the coil alone (it won't
really be wrapped around the capacitor any more)?

Should I just leave the whole thing alone?

Thanks.

   
Find
Mondial
Phorum Expert
*****
Posts: 1,114
Threads: 14
Joined: Feb 2013
City: Irvington, NY
#2

10-20-2014, 09:35 PM
The coil and capacitor combination serves to create a series resonant circuit at the 455 kHz IF frequency. This provides better bypassing of circuit ground to the chassis and prevents possible oscillations in the IF.

The best solution would be to restuff the original cardboard tube with a modern cap inside and leave the wire wrapped around it as original.
Find
Mr Grumpy
Junior Member
**
Posts: 45
Threads: 8
Joined: Jan 2013
City: Toronto Ontario
#3

10-21-2014, 11:52 PM
Thank you kindly for the explanation. Much clearer now.
Find
PhilcoJohn
Phorum Expert
*****
Posts: 1,463
Threads: 97
Joined: Jul 2012
City: Poughkeepsie, N.Y.
#4

10-27-2014, 06:52 PM
GRUMP Welcome back!
Find
Mr Grumpy
Junior Member
**
Posts: 45
Threads: 8
Joined: Jan 2013
City: Toronto Ontario
#5

11-03-2014, 04:37 PM
Thanks. My radio projects have been few and far between, but I've been reading and researching as I go.
This is one of my favorite places, I learn so much here.
Find
« Next Oldest | Next Newest »




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 60 Squealing
Wondering if I did it backwards. If a coil was wound backwards, the oscillator would not work at all. Old school...Chas — 07:23 PM
Philco 38-7 Speaker
4-ohm speaker. Black, Green leads.tludka — 07:00 PM
Philco 42-390, code 121 speaker
#87 on the schematic.  This radio had a 8" Zenith  speaker attached to it when I got it. I do don't know the hist...Stevelog — 06:39 PM
Philco 60 Squealing
I'm pretty sure I now have the litz wire soldered. This did not make any difference. Back in April I rewound the seconda...dconant — 06:25 PM
Philco 38-7 Speaker
Just to make sure, you chose either 4 ohm into 5K or into 10K? (blk-org or blk-grn)morzh — 06:23 PM
Philco 38-7 Speaker
I have let this one sit because of other duties. Now I am back, and I have a couple of questions. I hooked up a Hammond ...tludka — 05:34 PM
Philco 42-390, code 121 speaker
>>A closer examination of the very small print schematic indicates that the speaker is a PM type. This shows a ...morzh — 05:18 PM
Philco 60 Squealing
Litz is typically tinned by simply rubbing it with the soldering iron tip while immersed in solder (and a bit of rosin f...morzh — 05:14 PM
Philco 6K7
The suppressor grid (if by G3 you mean the S) is usually at the Cathode potential, which in this caes is GND. I am not ...morzh — 05:10 PM
Philco 16B Parts
Thanks for the reply. Unfortunately the radio was removed before bidding was over so I didn't get a chance to bid.dconant — 04:10 PM

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

>
  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration