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

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: 1 Guest(s)
[-]
Recent Posts
First Radio restoration
You could post in the WANTED ADs section here on the Phorum and see if anyone has an RF generator that they want to sell...klondike98 — 11:55 AM
Zenith H725
Good ideas, thank you Arrange and Rich. I have the adhesive aluminum foil already and can try that immediately. More ...EdHolland — 10:18 AM
Graphics for majestic 1050 dial glass.
Murf; I found this thread on the ARF, the first photo has a pretty good view of the dial glass. Regards ArranArran — 01:12 AM
Zenith H725
hello Ed, how about that speacial tape used for ducting it's like foil or how about thin piece of aluminum roof flash...radiorich — 12:19 AM
Zenith H725
Ed; One material that I have seen, but never tried for this was material for making exhaust gaskets, it's similar to ...Arran — 11:42 PM
Zenith H725
I just remembered, I have some hi temp silicone rubber material which could do the trick. Or a piece of FR4 laminate. Th...EdHolland — 08:39 PM
Zenith H725
The PSU filter cap arrived today (thank you USPS!) so I will work on that later. Meanwhile, I have the dial, speaker...EdHolland — 06:42 PM
Philco 610B oscillator wiring
Thanks Terry. After checking my notes I think I recorded about -10v at the 6A7 G4/control grid. The screen grid (G3 &...Tubester — 05:59 PM
The list of my radio & TV collection!
Magical chords of forgotten melodies, old nostalgic music on an old radio... Saturday night blues on the Mid-Waves on an...RadioSvit — 12:20 PM
Philco 42-345 Restoration/Repair
Thank you MrFixr55 the issue with this radio is that the internal coil antenna is missing and there was a wire in its pl...osanders0311 — 11:34 AM

[-]
Who's Online
There are currently 2597 online users. [Complete List]
» 1 Member(s) | 2596 Guest(s)
Avatar

>