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

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

84B Restoration - update-Touchdown!
#16

It looks very good Bob.  Would you share what process you used to make the resistors?

John KK4ZLF
Lexington, KY
"illegitimis non carborundum"
#17

Bob nice work!!
#18

John

I think Russ wrote a post on that. He does that all the time.
#19
Question 

John, I used a process I found on the net, although I'd have to search a bit to relocate it. (UPDATE- I found the thread, its our own Steve Davis' thread).  I take the barrel of a cheap Bic pen that is the right diameter and cut it to the right length.  With a hack saw blade I make a notch in both ends about 1/16 " so I can feed the leads through and then make two wraps around the tube (pen barrel).  I take the modern resistor and tack on buss wire (20 Guage if I recall corectly) such that the buss wire is soldered very close to the body of the resistor. This makes the buss wire the new leads for the restored resistor and of the right size and length to allow for the two wraps around the tube plus however much lead you need.  Slide the modern resistor into the tube, wrap twice at each end.   I then add a little solder to the two wrapped leads, just enough to flow solder to link the coils but be careful or you melt the tube. I plug each end with a little epoxy putty (the type that is a roll you cut and knead the two sections together.) I rough up the plastic with sand paper, paint with appropriate color and install.  In another radio I've made the type of resistor with the silver colored ends but in that case I made a mold out of epoxy putty and created the restored resistor with a mold technique....again, not my idea, but from a net search. Russ (Phlogiston) does outstanding restorations so I'll have to find the thread morzh mentioned. 
#20

Thanks Bob, I recall now the Bic pen method.  I think your other method with epoxy putty is the same (or similar) to the one posted on Radio Museum:

http://www.radiomuseum.org/forum/replica...stors.html

It seems like if you're going to re-stuff capacitors then the next step is to recreate the resistors that need to be replaced, although I have not yet given that a try.  Thanks for sharing! 

John KK4ZLF
Lexington, KY
"illegitimis non carborundum"
#21

John, I was adding the radio museum link and Steve Davis' Bic pen link while you responded  Icon_smile  I think this is the link that morzh was thinking of.  The resistor discussion is on page 2.

Ron. Maybe Steve's dogbone thread should be in the "helpful restoration tips" section?




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
Ok MrFixr55,  I have tried the DeoxIT D5 on the band switch and even though it has relieved the tension I felt when turn...osanders0311 — 11:11 AM
Part numbers to model cross
Is there a reference somewhere where you can punch in Philco part numbers and see what models those parts were used in?Jim Dutridge — 10:17 AM
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

[-]
Who's Online
There are currently 1569 online users. [Complete List]
» 3 Member(s) | 1566 Guest(s)
AvatarAvatarAvatar

>