Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

BAKELITE BLOCK TYPE capacitors
#5

More likely than not they are all leaky. Number 33 is audio coupling, if leaky, can drive the output hard and burn out OP transformer or the field coil as can the tone control caps. Number 20 if shorted, can also burn out the field. Number 49 if shorted can put a dangerous current on the chassis, replace with .01 safety cap. For safety, reliability and performance it is best the just replace them all. While you are at it check all the resisters, some have probably drifted high.

Steve

M R Radios   C M Tubes


Messages In This Thread
BAKELITE BLOCK TYPE capacitors - by fenbach - 12-31-2019, 08:51 PM
RE: BAKELITE BLOCK TYPE capacitors - by radiodale - 12-31-2019, 10:43 PM
RE: BAKELITE BLOCK TYPE capacitors - by Steve Davis - 12-31-2019, 10:55 PM
RE: BAKELITE BLOCK TYPE capacitors - by morzh - 01-01-2020, 02:27 PM
RE: BAKELITE BLOCK TYPE capacitors - by Kestas - 01-01-2020, 09:29 PM
RE: BAKELITE BLOCK TYPE capacitors - by morzh - 01-02-2020, 10:58 AM
RE: BAKELITE BLOCK TYPE capacitors - by fenbach - 01-04-2020, 02:11 PM
RE: BAKELITE BLOCK TYPE capacitors - by morzh - 01-04-2020, 08:59 PM



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 5070 online users. [Complete List]
» 1 Member(s) | 5069 Guest(s)
Avatar

>