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: 1 Guest(s)
[-]
Recent Posts
Philco 60 Squealing
Usually a wave trap is for keeping IF signals from entering the antenna and from leaving the antenna. You feed an IF sig...RodB — 09:30 PM
Philco 60 Squealing
I just peaked it for the best signal at 600. NULL it for IF frequency, originally it would have been null for 500kh...Chas — 08:05 PM
Philco 60 Squealing
Wavetrap no longer matters.morzh — 05:19 PM
Philco 60 Squealing
Rod, I had checked out your suggestions but did not help. I did solder the ground rivets to the chassis as Chas suggeste...dconant — 04:52 PM
37-690 Bass Choke Replacement
Yeah, I know, Mouser and Digikey don't have "big iron" components. For some reason Philco was messing with the...Radiodial — 04:25 PM
37-690 Bass Choke Replacement
Yes, I just had to deal with that while repairing the 37-604 Philco. Exactly that value choke was gone. And the current ...morzh — 03:52 PM
37-690 Bass Choke Replacement
Ah, now where to find one. I've into this before on smaller sets, I now recall. Hammond makes one that is only rated...Radiodial — 03:27 PM
Philco 38-7 Speaker
Ask the admins to put them together. As for the renaming, while inside the thread, you simply press "New reply&quo...morzh — 02:23 PM
37-690 Bass Choke Replacement
This is the parts catalog. 32-7528 choke is 65H, 10mA, 2,250 Ohm inductance. Find a suitable one.morzh — 02:18 PM
37-690 Bass Choke Replacement
While troubleshooting the no bass amplification issue, I think I found the culprit. The choke #104 is reading 164K ohms....Radiodial — 01:42 PM

[-]
Who's Online
There are currently 2662 online users. [Complete List]
» 2 Member(s) | 2660 Guest(s)
AvatarAvatar

>