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: 2 Guest(s)
[-]
Recent Posts
Atwater-Kent 84, restoration.
Rich yes, this is the way I got it. I have just put it on the table and took it apart. I suspect it even might work,...morzh — 11:31 PM
Atwater-Kent 84, restoration.
Hello mike, What nice looking radio I have one AK in my collection it's a console I have not started restoring it yet ....radiorich — 11:21 PM
91H Code 126 Restore
Just to make it more confusing here is another model 91 schematic that doesn't show parts with dotted lines in that spot...Arran — 10:37 PM
Atwater-Kent 84, restoration.
The wires were desoldered from the can, and the capacitors checked. All checked at 0.102 uF, which is correct. So the c...morzh — 09:41 PM
An attempt to remove the Field Coil from a G speaker
Arran Yours probably then the H speaker, same as mine.morzh — 08:39 PM
An attempt to remove the Field Coil from a G speaker
Mike; I would like to have a look at the speaker in my model 96, but the set is packed into a corner in the basement. ...Arran — 08:04 PM
91H Code 126 Restore
Thanks Arran, I'm convinced the power cord is good but have a nice repro plug for it. Would it be prudent to add a fus...RealRider — 07:28 PM
91H Code 126 Restore
As I was studying this schematic I was wondering what does this dotted line means?  I haven't traced it out yet. An o...RealRider — 07:22 PM
91H Code 126 Restore
When it comes to the cloth covered power cords, if they are not frayed, and are flexible, and if I can bend one without ...Arran — 06:21 PM
An attempt to remove the Field Coil from a G speaker
Could be. The central cylinder is OK, but the sides are...well. What's done is done. I wonder if some standard bobbine w...morzh — 06:02 PM

[-]
Who's Online
There are currently 5302 online users. [Complete List]
» 1 Member(s) | 5301 Guest(s)
Avatar

>