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

40-180 electrolitic
#1

Looking at the 12/350 electrolitic, and there are a few wires soldered to the mounting nut for the can.
There is what looks like a noncumductive washer under the nut.
There is a red wire soldered on the nut which has 13.5 volts going thru it from a terminal strip close by as well as a green wire(I think its green) from the transformer. There is also a resistor mounted to this nut which goes up to a terminal strip.
Is this just a tie point for the wires or do they need to be connected to the negative side of the new electrolitic.
Kind of confused on this one?
murf
#2

Those wires, and the nut, are connected to the can of the capacitor. The insulating washer is to keep the can negative above chassis ground for the bias section of the supply. Using the nut for a tie point for all those connections saved them having to add a large solder ring.
#3

Murf and BrendaAnn, this is excellent timing! After a few months of having my 40-180 apart, it is time to put things back together. This conversation saved me from making a silly, yet costly mistake in putting those cans back in - thank you!

Murf, did you restuff those cans, or just put the new cap under the chassis? I was planning on restuffing the can, but decided not to when I figured that cap might need to be replaced in another 15 years or so...

Eric
#4

Glad we could help.
Brenda straightened me out.
I just mounted them underneath. Much easier and I don't get many people flipping the radio over to look at the caps.
Good luck on yours and thanks again to Brenda.
murf




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
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
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

[-]
Who's Online
There are currently 4989 online users. [Complete List]
» 2 Member(s) | 4987 Guest(s)
AvatarAvatar

>