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

Thompson H-3 Speaker
#10

Thompson speaker update:
The good news is I can see what used to be a red tracer color in one of the wires so would assume that's the + side. The bad news is that checking the ohms across the wires (also checked at the connection points) shows a complete open. I then checked between one lead and the center connection between the two coils shown with the arrows, also open from either end. My conclusion is that both of those coils are open and I think that may be a very difficult fix. I suppose I could disassemble everything and try to rewind the coils Icon_rolleyes Has anyone tried anything like that?

[those lines on the bottom and top right are reflections of the window blinds in my shop. I was using a magnifying lens to light and magnify the image]
[Image: https://www.dropbox.com/s/2mvu3s5fwvw6lt....jpg?raw=1]

I decided to take a quick look at the Stewart Warner 415 speaker and found that the resistance across its two leads was 5 to 7 Meg so something isn't right there either. Getting into this speaker is not as easy as the first. The front and back are fitted onto the body and secured with two rivets. The back was missing one rivet and the other was partially out so I was able to work it out and get the back off. Unfortunately that doesn't give me much access. The workings are on the other side. I was able to re-seat the gasket however. I now have to decide whether to try and dremel grind off the rivets for the front without damaging it and whether its worth it or not.
[Image: https://www.dropbox.com/s/41r4kom1enh9yd....jpg?raw=1]
[Image: https://www.dropbox.com/s/51rvq8yfgnwifu....jpg?raw=1]


Messages In This Thread
Thompson H-3 Speaker - by klondike98 - 03-18-2023, 10:29 PM
RE: Thompson Speaker - by morzh - 03-18-2023, 10:59 PM
RE: Thompson Speaker - by klondike98 - 03-18-2023, 11:26 PM
RE: Thompson Speaker - by MrFixr55 - 03-19-2023, 12:37 AM
RE: Thompson Speaker - by klondike98 - 03-19-2023, 03:44 AM
RE: Thompson Speaker - by MrFixr55 - 03-19-2023, 08:42 AM
RE: Thompson Speaker - by Chas - 03-19-2023, 10:56 AM
RE: Thompson Speaker - by klondike98 - 03-19-2023, 10:59 AM
RE: Thompson Speaker - by klondike98 - 03-19-2023, 11:05 AM
RE: Thompson Speaker & Stewart Warner 415 - by klondike98 - 03-19-2023, 07:41 PM
RE: Thompson Speaker - by klondike98 - 03-26-2023, 08:39 PM
RE: Thompson Speaker - by MrFixr55 - 03-26-2023, 09:21 PM
RE: Thompson H-3 Speaker - by klondike98 - 07-30-2023, 11:11 PM
RE: Thompson H-3 Speaker - by MrFixr55 - 07-31-2023, 03:47 PM
RE: Thompson H-3 Speaker - by klondike98 - 07-31-2023, 08:23 PM
RE: Thompson H-3 Speaker - by Chas - 07-31-2023, 09:24 PM
RE: Thompson H-3 Speaker - by klondike98 - 07-31-2023, 10:41 PM
RE: Thompson H-3 Speaker - by Chas - 07-31-2023, 11:37 PM
RE: Thompson H-3 Speaker - by klondike98 - 08-07-2023, 09:12 PM
RE: Thompson H-3 Speaker - by MrFixr55 - 08-07-2023, 11:26 PM
RE: Thompson H-3 Speaker - by klondike98 - 08-13-2023, 06:00 PM
RE: Thompson H-3 Speaker - by Chas - 08-13-2023, 07:12 PM
RE: Thompson H-3 Speaker - by EdHolland - 08-16-2023, 02:52 PM



Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
RodB :beerchug:Vlad95 — 10:22 AM
Philco 42-345 Restoration/Repair
Vlad, you nailed it. Swiss and German roots.RodB — 09:54 AM
5U4 vs 5Z4 tubes
Well this is a Hallicrafters SX/9 circa 1936. No real issues so far although I dodged a real bullet with a cap that was...bridkarl — 07:59 AM
5U4 vs 5Z4 tubes
The pinout is the same but the 5U4 has a 3 amp filament, verses 2 amps or less on the 5Z4. I think that the pinout of a ...Arran — 12:04 AM
Philco 42-345 Restoration/Repair
By the way. osanders0311 Take a look here: Dial cord stringing Guides May be here you can fount correct string settin...Vlad95 — 11:15 PM
5U4 vs 5Z4 tubes
5U4 and 5Z4 almost identical. I think nothing happened if you left 5U4 instedad 5Z4 long time. Just heater current 5U4 ...Vlad95 — 11:02 PM
Philco 42-345 Restoration/Repair
Hello Vlad95 , Very Funny ! Sincerely Richardradiorich — 11:01 PM
Philco 42-345 Restoration/Repair
RodB You are European yourself   :evil: I'm Canadian for the last 30 years  :snowman: But not Yankee  :lol: Vlad95 — 10:49 PM
Philco 42-345 Restoration/Repair
The band switch selects different oscillator coils for the band selected. I would look for a bad connection in the switc...RodB — 10:31 PM
Philco 42-345 Restoration/Repair
Hang in there...PaulPaul Philco322 — 09:30 PM

[-]
Who's Online
There are currently 825 online users. [Complete List]
» 3 Member(s) | 822 Guest(s)
AvatarAvatarAvatar

>