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

Linear Mode
model 625 tone control problem
Texasrocker
Phorum Expert
*****
Posts: 909
Threads: 117
Joined: Jun 2007
#4

08-21-2007, 09:13 PM
Hello. On your recapping job,( You mentioned electrolytics only),... did you also replace all the old bypass condensers as well? If not, those old bakelite blocks caps,and old paper types (bypass condensers)if still remaining could be faulty as well and cause the prob.I have found in most cases, squeeling or a motorboating sound is because of a faulty bypass condenser prob. I had that happen to me before on a Philco after just replacing the filter caps only. After I went back and replaced all the bakelight blocks, the squeeling stopped. Most likely, it is a bypass prob somewhere? Just my opinion. Randal
Find
« Next Oldest | Next Newest »


Messages In This Thread
model 625 tone control problem - by Guest - 08-20-2007, 11:46 AM
[No subject] - by Ron Ramirez - 08-20-2007, 05:33 PM
[No subject] - by Guest - 08-21-2007, 01:26 PM
[No subject] - by Texasrocker - 08-21-2007, 09:13 PM
[No subject] - by radiomikee - 08-22-2007, 10:06 AM
[No subject] - by davemc - 10-01-2007, 08:32 AM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
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
Philco 16B Parts
Hi Dan, Mike is correct, there's a lot of painted stuff on the chassis but it looks pretty good. The sm is all there,sp...Radioroslyn — 03:50 PM
1930s Stromberg-Carlson Tombstone Radio need help identifying model number
Hi Cap'n Clock, Unfortunately, I do not have this radio.  This is a shame because this should be a good performer.  2A...captainclock1988 — 03:43 PM
Philco 42-390, code 121 speaker
Using a 5W  1.5k  ceramic resistor in place of the field coil and using a 4 ohm PM speaker, I was able to bring the radi...Stevelog — 02:57 PM

[-]
Who's Online
There are currently 4500 online users. [Complete List]
» 2 Member(s) | 4498 Guest(s)
AvatarAvatar

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