Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Z 5-S-127 Chassis Done - Almost
#1

I more or less finished one of two 5-S-127 chassis, recapped, reresisotored (if that's a word)... It works on all bands pretty well but still needs to be aligned, voltages need better checking and the dial needs replacing.

But I think it's getting displaced from the "workbench" by the 37-116 I got last week. So that's it for now.

I tried some things I'd like to apply to the 37-116. I think these things helped the appearance...

- Electrolytics restuffed and negative terminals soldered to insides of  the original aluminum cans.

- Paper caps restuffed, ends capped off with beeswax and lightly coated with wax. Anybody think it's a bad idea to use beeswax? They aren't full of it, just the very end. I stuck cardboard disks into the ends before waxing. I'd like something that melted at a bit higher temp. Carnauba seems shrink and crack as it cools. I tried mix but not much better.

- Resistors replaced with new ones all encapsulated with resin to appear to be dog bones. They seem to have originally used both dog bone and non but with no rhyme or reason to which where. Probably just availability.

Before (Photos don't do justice to filth on it.):

   

   

After:

   

   

Can't think of anything witty.
Greg O.
Whitehall, PA
#2

Nice job.

Merry Christmas. Happy Hanuka.
#3

You've got that chassis shined up all nice and pretty Greg, good job.  I think beeswax is just fine.... often I'll use brown hot glue and sometimes top it with beeswax.

Edit: what process did you use to make the dogbone resistors?

John KK4ZLF
Lexington, KY
"illegitimis non carborundum"
#4

John -

I describe making the dog bone resistors here:
https://philcoradio.com/phorum/showthread.php?tid=20489

For the larger, 1W, ones there are 2 resistors in series. I also added thicker leads.
Since the smaller, 1/2W, ones are similar in size to the dog bone original it's difficult to add thicker leads. Not much room left in the mold.

I dyed the resin black so if it shows through the paint it will look like the original carbon.

I didn't do it, but I thought of painting the ends silver to mimic solder attaching the originals' leads to the carbon rod. Then I add the body color over that. A little silver showing would make them more realistic. But I figured at that point it would be a bit pathological so I stopped Icon_smile.

By the way does anybody know how they soldered the leads to carbon/binder rod. That doesn't seem possible.

Can't think of anything witty.
Greg O.
Whitehall, PA




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Jackson 715 not working
Mrfixr55, its working now. I cleaned the switches and sockets with spray cleaner. Thanks for helping on this one.daveone23 — 06:26 PM
Jackson 715 not working
Now that you posted the schematic, I don't know why that Sprague electrolytic cap is across the meter, as it is not indi...MrFixr55 — 05:51 PM
HiFi (Chifi) tube amp build - but my own design.
What may be lacking in the PP Tube amps may be the 2nd harmonics, which some, especially RCA back in the day called &quo...MrFixr55 — 05:32 PM
Jackson 715 not working
Usually in an emission tester, the tube under test is measured as if it were a diode. So, some testers connect all the g...RodB — 04:17 PM
Restoring Philco 37-604C
Yep. F5 is green, D5 is Red. Red is Bad. Green is Clean.morzh — 01:30 PM
Jackson 715 not working
I did start to do that but I stalled out because I could not figure out how the grid and plate get voltage. In this diag...daveone23 — 11:52 AM
Restoring Philco 37-604C
(Insert Homer Simpson "DOPF" Here.) When all fails, look at the can. Took the Ron Ramirez advice, red Caig D...MrFixr55 — 09:23 AM
Philco 91 Speaker Replacement
From your text I am not sure if you intend to use the existing speaker with a resistor instead of the field coil. It wo...morzh — 08:44 AM
Philco 91 Speaker Replacement
My field coil is bad. I am still hoping to find an original, but if I can't I will go with a fitting Philco speaker, 125...dconant — 08:34 AM
Philco 91 Speaker Replacement
As Rod said, it is OK to use a fitting speaker, and then look for an original one. If you buy a Hammond 125 output tr...morzh — 08:15 AM

[-]
Who's Online
There are currently 5310 online users. [Complete List]
» 2 Member(s) | 5308 Guest(s)
AvatarAvatar

>