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

Model 37-3630A Candohm Replacement (US 37-630)
#1

I am replacing the candohm in the picture attached (#61).
 
In the Philco Phorum I read that the 202 is ohm 20W, 8 ohm is 2 W and the 35 ohm is 5W.  I am considering using Vitrious Enamel Power resistors but the values are not exact unless I stack resistors.  Stacking is not an option with these because they are each 1.75 inches long and space is limited.  What I would like to do is use a 200 ohm 25 W, 10 ohm 5 W and 33 ohm 12 W.  The question is, how exact should be the replacements?

Thank you.


Attached Files Image(s)
   

Glenn
#2

I'm coming up with a bit less wattage than you. The 200 ohm section actual dissipation is a little more that 1.6w. So a 7.5 or 10w unit would be a good choice. The other 2 are under 1/2 w so 2w would be fine. Figured based on 90ma current flow thru the hv winding. Could be less.

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry
#3

Terry:

I obviously have a lot to learn and appreciate the help.  Your reply makes a huge difference in how I intended to tackle the rebuild. 

Thank you for taking the time to respond.  Stay well!

Glenn
#4

Mouser. I like the black (color) wire wound units from Vishay.

Your 200 ohm WW for about $2:

https://www.mouser.com/ProductDetail/Vis...Ap4el4c%3D

Russ

"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/
#5

Thanks Russ I will check them out.

Glenn

Glenn
#6

Hello GRG,
I am with Russ those are good resistors and far as the value with in few ohms is not a big deal Because the voltages nowadays are higher and your filter capacitors too .
Sincerely Rich
#7

Thought I'd post a picture of the replacement I made for the 3 section candohm.  Found enough parts in my existing supplies to make it work.  The 5W 20 is two resistors in parallel to get to the 10 ohms needed. The Radio is now working well.


Attached Files Image(s)
   

Glenn
#8

Looks great Glenn.




Users browsing this thread: 4 Guest(s)
[-]
Recent Posts
12' Philco
And here's a story about the tires on the truck. Same "no-stoop" guy must have installed these! Take care a...GarySP — 01:17 PM
Hickok AC51 tube tester
I think they have only shown the secondaries of the transformer. Two of them feed the rectifiers' filaments.morzh — 12:58 PM
IF can wire size and Rubber mounts?
Arran If the wire inside cans is the gauges you mentioned, the sole reason for that would be mechanical, to stiffen t...morzh — 12:56 PM
12' Philco
Rod, Yes, I know, but the Giant Philco is not around anymore either, so I go by whoever was alive fairly recently. H...morzh — 12:54 PM
Hickok AC51 tube tester
Absolutely no one is going to reverse engineer that circuit. Even the iron core is missing.RodB — 10:37 AM
IF can wire size and Rubber mounts?
Thanks to both members for your help regarding wire and tuner mtg supports. regards--Johngeorgetownjohn — 09:33 AM
Hickok AC51 tube tester
Note that no power cord, power switch, or power transformer switch are shown. That (along with my experience with full s...DaleHCook — 07:09 AM
IF can wire size and Rubber mounts?
A pair of wire strippers can give you an idea of what the existing gauge of the wire leads are in the IF can, I think it...Arran — 06:07 AM
My last cabinet for this year
Hello Dan, That is really beautiful what great looking radio you have ! I have friends who live in Calgary and the wea...radiorich — 01:51 AM
Philco Predicta Siesta picture over time getting dimmer
I found that the wire insulation was burnt.  The fly back needs corona dope! Why would someone put that there?Platinumblonde36 — 01:09 AM

[-]
Who's Online
There are currently 5298 online users. [Complete List]
» 1 Member(s) | 5297 Guest(s)
Avatar

>