Philco 38-7CS

Thread Rating:

0 Vote(s) - 0 Average
1
2
3
4
5

Linear Mode

Philco 38-7CS

Mondial
Phorum Expert

Posts: 1,114
Threads: 14
Joined: Feb 2013
City: Irvington, NY

#17

07-28-2014, 04:26 PM

Bob, what voltage do you have at both ends of resistor 27? This is a 1 meg that connects from the AVC line to a tap on the wirewound bias resistor.

There should be about -3 VDC on both ends to chassis. If no voltage on the AVC line then possibly the 1 meg is open, or there is a high resistance short to ground. The AVC line should rest at -3 VDC and go more negative with signal.

Find

« Next Oldest | Next Newest »

Messages In This Thread

Philco 38-7CS - by Bob Andersen - 07-24-2014, 07:32 PM

RE: Philco 38-7CS - by Bob Andersen - 07-24-2014, 07:41 PM

RE: Philco 38-7CS - by Bob Andersen - 07-24-2014, 07:48 PM

RE: Philco 38-7CS - by Bob Andersen - 07-24-2014, 07:57 PM

RE: Philco 38-7CS - by Arran - 07-24-2014, 09:34 PM

RE: Philco 38-7CS - by Bob Andersen - 07-24-2014, 09:50 PM

RE: Philco 38-7CS - by codefox1 - 07-25-2014, 01:34 PM

RE: Philco 38-7CS - by Chuck Schwark - 07-25-2014, 01:46 PM

RE: Philco 38-7CS - by morzh - 07-25-2014, 01:47 PM

RE: Philco 38-7CS - by Bob Andersen - 07-25-2014, 04:24 PM

RE: Philco 38-7CS - by morzh - 07-25-2014, 05:02 PM

RE: Philco 38-7CS - by Arran - 07-26-2014, 12:06 AM

RE: Philco 38-7CS - by Bob Andersen - 07-27-2014, 03:35 PM

RE: Philco 38-7CS - by gregb - 07-27-2014, 11:13 PM

RE: Philco 38-7CS - by Bob Andersen - 07-27-2014, 11:28 PM

RE: Philco 38-7CS - by Bob Andersen - 07-28-2014, 04:16 PM

RE: Philco 38-7CS - by Mondial - 07-28-2014, 04:26 PM

RE: Philco 38-7CS - by Bob Andersen - 07-28-2014, 05:18 PM

RE: Philco 38-7CS - by Mondial - 07-28-2014, 05:36 PM

RE: Philco 38-7CS - by Bob Andersen - 07-28-2014, 06:51 PM

RE: Philco 38-7CS - by Bob Andersen - 07-28-2014, 10:29 PM

RE: Philco 38-7CS - by Chuck Schwark - 07-29-2014, 10:35 AM

RE: Philco 38-7CS - by morzh - 07-29-2014, 10:37 AM

RE: Philco 38-7CS - by Chuck Schwark - 07-29-2014, 10:42 AM

RE: Philco 38-7CS - by morzh - 07-29-2014, 11:02 AM

RE: Philco 38-7CS - by Warren - 07-29-2014, 01:59 PM

RE: Philco 38-7CS - by gregb - 07-29-2014, 03:16 PM

RE: Philco 38-7CS - by Bob Andersen - 07-29-2014, 03:31 PM

RE: Philco 38-7CS - by Bob Andersen - 08-03-2014, 02:06 PM

RE: Philco 38-7CS - by codefox1 - 08-03-2014, 04:29 PM

View a Printable Version

Users browsing this thread: 1 Guest(s)

Recent Posts
Philco 60 Squealing
I seem to remember eliminating a squeal by changing the IF frequency by a few KHz. Not that you should put too much tru...fenbach — 08:48 PM
Philco 42-390, code 121 speaker
These speakers pop up on eBay regularly, even if at bloated prices. Honestly, have not seen many parts on swapmeets.morzh — 08:38 PM
Philco 38-7 Speaker
The put-put is not like the speaker problem.morzh — 08:29 PM
Mission Bell Model 19A Car Radio
Hello everyone, As mentioned in my last post I was going to see if the vibrator / rectifier section could be persuaded...Antipodal — 08:21 PM
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

Who's Online

There are currently 4921 online users. [Complete List]
» 1 Member(s) | 4920 Guest(s)

Login
Username:
Password:	Lost Password?
	Remember me