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

A question of polarity
#1

While searching for a suitable speaker, I've been recapping the Stewart Warner model 1691 / R-172 chassis and have a question on the two 16 mfd electrolytic caps, #25 & 26 on the schematic:

 http://www.nostalgiaair.org/pagesbymodel...021218.pdf

I'm "assuming" #25 has the negative side to ground?

But number 26 has me stumped because the symbol for the capacitor on the schematic is just two straight lines, giving no indication of polarity. Can anyone tell me if the negative side of the cap should go to the speaker plug and the rectifier tube or the positive side? Terry?

Thanks!

Greg V.
West Bend, WI
Member WARCI.org
#2

Positive goes to the rectifier tube and speaker plug, negative to center tap for cap #26

Positive goes to speaker plug, negative to ground for cap #25
#3

Icon_thumbup Many thanks! That's how I had them wired in.

Greg V.
West Bend, WI
Member WARCI.org




Users browsing this thread:
[-]
Recent Posts
Restoration of the Canadian General Electric A-87
Well... While the varnish is drying up, I started repairing the chassis... Of course I started by replacing the pa...RadioSvit — 07:12 AM
Philco Model 38-7: what caps & resistors do fail typically?
Hello Martin, Welcome aboard our little community what great Model 38-7 Sincerely Richardradiorich — 12:30 AM
Philco Model 38-7: what caps & resistors do fail typically?
Welcome to the Phorum Martin. I count about 9 paper caps, the 3 electrolytic caps and 2-Y2 safety caps to replace th...RodB — 09:44 PM
Part numbers to model cross
Jim, We have this index put together by Dale Cook but I don't think that is quite what you are looking for. The Parts...klondike98 — 09:37 PM
Philco Model 38-7: what caps & resistors do fail typically?
Yep the dim bulb test is OK but I'd definitely replace all those electrolytics before I did it. Since those #47 conden...klondike98 — 09:18 PM
Philco 42-345 Restoration/Repair
The resistor is a 2.2 Meg, it was the last one I hadn't replaced. The broadcast is coming in after replacing it.osanders0311 — 09:09 PM
Philco 42-345 Restoration/Repair
What does the resistor measure? I think it should be 3.3 Meg. If the oscillator coil has continuity and the resistanc...RodB — 09:03 PM
Philco Model 38-7: what caps & resistors do fail typically?
Good idea to check the coils... then I'll get hold of an incadescent light bulb and see what happens when the unit is sw...Musaeum — 08:49 PM
Philco 42-345 Restoration/Repair
I have that same set, ain't too much shortwave I like anyway.....it is a good AM DX set. PaulPaul Philco322 — 08:32 PM
Philco Model 38-7: what caps & resistors do fail typically?
Welcome to the Phorum, Martin! Open a new thread in Philco Electronic Restoration when you begin working on your 38-7. ...GarySP — 08:28 PM

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

>