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

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, 11:10 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:
[-]
Recent Posts
Philco 42-345 Restoration/Repair
Yes, 57 is an electrolytic cap that should be 12 mfd 400 volts according to the parts list from the Phorum library schem...RodB — 06:01 PM
Philco 42-345 Restoration/Repair
Looks like if I am reading it correctly it looks like the silver capacitor#57 that appears to be a replacement is of a l...osanders0311 — 05:09 PM
Philco model 38 code 121 not receiving signal.
Thanks Arran. Yeah this plastic is pretty thin. It's a little thinner than the original stuff. It kinda reminds me of p...Stormlord5500 — 04:37 PM
Testing a speaker and output transformer Trutone A2-G
The equivalent of one short turn is basically the same as that of a shorted load. If it is the primary's turn, then the ...morzh — 03:53 PM
Testing a speaker and output transformer Trutone A2-G
I've never had an output transformer become shorted, the failure mode is usually an open primary, or in a center tapped ...Arran — 03:52 PM
Philco model 38 code 121 not receiving signal.
As long as the plastic sheeting isn't too thick, I think that the thickness of photographic film would be just about rig...Arran — 03:19 PM
Philco model 38 code 121 not receiving signal.
Well why not! :lol:Stormlord5500 — 03:14 PM
Philco model 38 code 121 not receiving signal.
Good luck next thing you know you will be winding coils just for the fun of it. DavidDavid — 11:29 AM
Testing a speaker and output transformer Trutone A2-G
morzh Short-circuited turns can be considered as a half-dead transformer. But on this case transformer will hot and s...Vlad95 — 11:01 AM
Testing a speaker and output transformer Trutone A2-G
I am not sure how a transformer could be weak. It could be inadequate, but only when you replace the original with somet...morzh — 09:56 AM

[-]
Who's Online
There are currently 2136 online users. [Complete List]
» 1 Member(s) | 2135 Guest(s)
Avatar

>