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

Grid cap ?
#1

Hi, I think that is what they are called. Metal cap at top of a tube connected to the grid . I am starting to recap a farm set 41-95 .As I tried to remove the wire carefully from the top of the tube the metal cap came off. So there is a small wire sticking out of the tube on top .
I suspect the seal to the tube is ok. And I can only think this wire needs to be soldered back on. Has anyone had to do this before ? Is there a tip or certain method to use .The cap has a cork like plug in its base that rest against the tube.Then way up at the top of the cap it was soldered .I do not think I can pull that type of solder job off. I know I can't . I was going to half fill the cap with solder heat then stick the tube (upside down ) into the cap . Don't want to learn from experience (mine) if possible.So I would appreciate any info or help on this .
Thanks !

Bill T
#2

Bill-
We have all done it before. If the lead from the tube is full length- that is it will stick through the hole in the metal cap- just resolder it and glue it back on with super glue. You may want to scrape the lead and tin it with solder first.

If the remaining lead on the tube is short, you will have to scrape it carefully with an Xacto knife, and wrap it with some fine buss wire, and solder it. Before you feed this fine wire through the grid cap hole, leave an extra length inside the cap so that your wire doesn't come unsoldered from the tube lead when you do the final cap joint.

Pete AI2V
#3

Pete, Thank for the instructions .That was the first time I run into that.
Did not realize there was a hole in the cap . I did'nt think the solder was on the outside , it looked like metal or part of the cap ! That was'nt so bad after all.I thought I was going to have to solder the wire up inside the cap somehow. Anyway worked out fine once I read your post and tried it .
Thanks for the help!

Bill




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
Hi OSanders, Look carefully at the band switch. Turn it slowly and "wiggle" it around the desired band. ...MrFixr55 — 12:33 AM
5U4 vs 5Z4 tubes
I think that RCA and GE introduced metal tubes in the USA in 1936.  I don't know if they were being made by RCA, GE or b...MrFixr55 — 11:20 PM
Philco 42-345 Restoration/Repair
Vlad95, Thank you for the stringing guides and wow there are so manyosanders0311 — 06:01 PM
5U4 vs 5Z4 tubes
A pre war Hallicrafters, and an early one too, very nice! 1936 is pretty early for metal tubes too, which would explain ...Arran — 05:58 PM
Philco 42-345 Restoration/Repair
Thanks Rod, "When you hear the background hiss and no station it usually indicates that the oscillator quit" ...osanders0311 — 05:52 PM
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

[-]
Who's Online
There are currently 1321 online users. [Complete List]
» 1 Member(s) | 1320 Guest(s)
Avatar

>