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

38-690 Power Supply Chassis Rebuild
#1

Wanted to show you guys the before and after.
Replaced all resistors and restuffed all caps Icon_angel
More to come Icon_crazy
   
   
   
   
   
camman
Edit: I used beeswax and filled each end of all wax caps.
Top of chassis added
#2

(05-08-2012, 10:10 AM)camman Wrote:  Wanted to show you guys the before and after.
Replaced all resistors and restuffed all caps Icon_angel
More to come Icon_crazy


camman

Please put a dated note in the set stating what you have done and when, nd shae your secret for replicating the grunge on the restuffed caps.
#3

Looks the same! Great job!!
Terry
#4

Is there a difference? Should there be any? If the purpose were to make all that's been done barely noticeable, I command you for that Icon_smile

If you re-stuffed the paper caps, great job, but then a picture at an angle to show that they have been re-stuffed would help; otherwise there is nothing I personally can tell that was done to this chassis.

"Find 10 discrepancies" for kids comes to mind Icon_biggrin
#5

Nice job!
I don't mean to nitpick, but I do see one discrepancy - the modern blue resistors Icon_e_wink
Once, I molded a few replica "dogbones" using this technique: http://www.radiomuseum.org/forum/replica...stors.html
It was an interesting little project, but time consuming for sure.
I wonder if the technique could be adapted to these later cylindrical style resistors ?
#6

I think if the power rating is not very critical, and also considering that many of today's resistors are of smaller sizes than those being replaced, in some cases it may be possible to axially drill through the old dog-bone and put the new one inside.

I should try that sometime.
#7

Quote:Nice job! I don't mean to nitpick, but I do see one discrepancy - the modern blue resistors
Bandersen,
Thanks for the complement!
No dog bone style resistors in this model.
I could have used the same style carbon composition resistors.
C.C. is old technology (get noisy, moisture susceptible ect.) and not the long term reliability as carbon or metal film.
That is the best excuse I can come up with. Icon_yawn
camman
#8

Sure, I use metal film / oxide when replacing too. I was just wondering if anyone had tried replicating the late 30s style resistors. I might give it a try in some upcoming projects.




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 4026 online users. [Complete List]
» 1 Member(s) | 4025 Guest(s)
Avatar

>