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

Speaker Connection to Ground in 42-350
#1

OK, this is embarrassing. I'm almost finished rewiring and recapping a 42-350 that I started before Christmas. I took notes and drew pictures where the wires went, but unfortunately left the speaker wires off of the drawings. I probably figured it would be easy to reconnect them to the secondary leads from the output transformer, so I didn't bother to draw them in.

That was true with the one of the leads, but the output transformer has only one secondary lead. The other is soldered right to the transformer frame and apparently grounds to the chassis through the rivets.

My question is: can I ground the other side of the speaker to any convenient ground, regardless of where it went originally? The two speaker leads are the same length and are tied together about 3 inches from the end, so they evidently terminated near one another. The most convenient ground terminals are the center pin of the rectifier tube socket and the ground pin of the Bakelite condenser.

What do you guys think? Will any convenient ground do? Is there any reference to where this wire went originally?

Lesson learned. Never again take apart a radio without using the digital camera!

John Honeycutt
#2

Hope I'm not speaking out of line since I haven't seen this particular set, but going to assume that it shouldn't be too critical where you connect the wire since it's an audio return path. Lead dress can make a difference in other stages but I'm thinking for this you should be fine at any convenient ground point.




Users browsing this thread:
[-]
Recent Posts
Need to purchase some accessories for restoration of my Old Philco Radio
Hi Paulo, Welcome to the Philco Phorum. I can see why you want to find good reproduction parts. That is a bea...MrFixr55 — 11:10 PM
HiFi (Chifi) tube amp build - but my own design.
Tim, I have some bakelite sockets in my work shop that I can dig up. I believe quite a few are NOS. I will take photo...RodB — 10:03 PM
Philco 610B oscillator wiring
> The cathode as noted is wired directly to the ground side of the heater filament for that tube, not to the #17 and ...Radioroslyn — 08:12 PM
HiFi (Chifi) tube amp build - but my own design.
Tim; I noticed your post a little late, but I would take one of the junk sockets and try to break a chunk out of it wi...Arran — 08:07 PM
Need to purchase some accessories for restoration of my Old Philco Radio
Here is a list of resources found in our online library that you might find useful. Mike's Gobs of Knobs email addres...klondike98 — 01:46 PM
First Radio restoration
Hi Tubeman, Welcome to the Philco Phorum.  Phamily Phriendly Pfun with Phine Pholks Phull of Philco Phacts. (See a p...MrFixr55 — 12:33 PM
First Radio restoration
You could post in the WANTED ADs section here on the Phorum and see if anyone has an RF generator that they want to sell...klondike98 — 11:55 AM
Zenith H725
Good ideas, thank you Arrange and Rich. I have the adhesive aluminum foil already and can try that immediately. More ...EdHolland — 10:18 AM
Graphics for majestic 1050 dial glass.
Murf; I found this thread on the ARF, the first photo has a pretty good view of the dial glass. Regards ArranArran — 01:12 AM
Zenith H725
hello Ed, how about that speacial tape used for ducting it's like foil or how about thin piece of aluminum roof flash...radiorich — 12:19 AM

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

>