Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

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
HiFi (Chifi) tube amp build - but my own design.
It's the other forum. I'm also in DIY, but mostly read there. Honestly, I kinda jumped into this without much thought to...TV MAN — 10:43 AM
Philco 71 Code 125
Hello,  I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM
54C Cabinet Refinish
I started stripping this cabinet before it got super chilly out because I knew I wasn't going to be able to work on ...glyphmon — 11:18 PM

[-]
Who's Online
There are currently 1728 online users. [Complete List]
» 3 Member(s) | 1725 Guest(s)
AvatarAvatarAvatar

>