Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

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

1948 Westinghouse Model 1821 (182) audio problems
#40

Quote:Even 50 is wrong. Should not exceed 40uF.


morzh, 50 MFD is NOT incorrect, that's what's in there right now, its a 3 section can that has 2 sections that are rated at 50 MFD @ 150 WVDC and then a 3rd section that is 20 MFD @ 25 WVDC, the filter cap can that's in there right now is the original unit to the radio, the Riders even calls for a 50/50 MFD @150 WVDC  and 20 MFD @ 25 WVDC.

Unfortunately there's no such thing as a 50 MFD cap anymore since they changed the capacitor rating system back in the 1970s, so the next closest thing is a 47 MFD (which I don't have on hand right now, I would have to order it) or a 68 MFD Cap (which I don't have any of those around either and those would have to be ordered too).

So either way right now the only capacitor I had on hand was the one that could replace the 20 MFD at 25V unit, which I replaced that with a 22 MFD at 63V.

But the good thing is, the place where all of the e-caps need to go are conveniently located near a terminal strip with an unused lug that ties to chassis ground so all I need to do is get some axial lead 47 MFD or 68 MFD @ 160 V e-caps to replace the remaining sections of the old can and solder the negative leads to the unused terminal strip that's tied to chassis ground and then tie the positive leads to their respective terminal leads, and that has eliminated about a foot and a half of wire out of the chassis that was used to connect the old can cap to their respective tie points, and thus cleaning up the chassis more.

Also in regards to the output transformer that I had said was "dead" it actually isn't because when I was probing around in the radio with it turned on with my DMM (the radio was plugged into an isolation transformer) I was able to get it to produce a hum, a loud hum at that, so I'm wondering if there isn't a cold solder joint on one of the output transformer primary leads and where they connect.


Messages In This Thread
RE: 1948 Westinghouse Model 1821 (182) audio problems - by captainclock1988 - 09-10-2020, 10:32 AM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
Hi OSanders, Look carefully at the band switch. Turn it slowly and "wiggle" it around the desired band. ...MrFixr55 — 12:33 AM
5U4 vs 5Z4 tubes
I think that RCA and GE introduced metal tubes in the USA in 1936.  I don't know if they were being made by RCA, GE or b...MrFixr55 — 11:20 PM
Philco 42-345 Restoration/Repair
Vlad95, Thank you for the stringing guides and wow there are so manyosanders0311 — 06:01 PM
5U4 vs 5Z4 tubes
A pre war Hallicrafters, and an early one too, very nice! 1936 is pretty early for metal tubes too, which would explain ...Arran — 05:58 PM
Philco 42-345 Restoration/Repair
Thanks Rod, "When you hear the background hiss and no station it usually indicates that the oscillator quit" ...osanders0311 — 05:52 PM
Philco 42-345 Restoration/Repair
RodB :beerchug:Vlad95 — 10:22 AM
Philco 42-345 Restoration/Repair
Vlad, you nailed it. Swiss and German roots.RodB — 09:54 AM
5U4 vs 5Z4 tubes
Well this is a Hallicrafters SX/9 circa 1936. No real issues so far although I dodged a real bullet with a cap that was...bridkarl — 07:59 AM
5U4 vs 5Z4 tubes
The pinout is the same but the 5U4 has a 3 amp filament, verses 2 amps or less on the 5Z4. I think that the pinout of a ...Arran — 12:04 AM
Philco 42-345 Restoration/Repair
By the way. osanders0311 Take a look here: Dial cord stringing Guides May be here you can fount correct string settin...Vlad95 — 11:15 PM

[-]
Who's Online
There are currently 1182 online users. [Complete List]
» 1 Member(s) | 1181 Guest(s)
Avatar

>