1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration

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

Threaded Mode
Filament Resistor replacement
elfiself
Member
***
Posts: 58
Threads: 9
Joined: Apr 2016
City: Albany,NY
#1

11-23-2018, 01:45 PM
Half of a 33-3408-3 filament resistor is bad and I'm looking to replace the whole component. It is a 40/80 ohm. what wattage value would be appropriate?
TIA
elfiself
Find
Radioroslyn
Phorum Expert
*****
Posts: 7,302
Threads: 269
Joined: Dec 2009
City: Roslyn Pa
#2

11-23-2018, 02:41 PM
Actual dissipation is abt 3W BUT if you don't want a flaming hot resistor go w/abt X3= 7-10W.
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
Find
morzh
Odobenus rosmarus
******
Posts: 16,533
Threads: 573
Joined: Oct 2011
City: Jackson State, Province, Country: NJ
#3

11-23-2018, 03:35 PM
For power resistors I triple the ating, so for 3W it is 10W for me.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
Find
elfiself
Member
***
Posts: 58
Threads: 9
Joined: Apr 2016
City: Albany,NY
#4

11-23-2018, 04:51 PM
Thanks Terry. The math works out to 2.4W X3 Looks like 10W should cover it.
Larry
Find
« Next Oldest | Next Newest »
Thread Closed




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 91 code 221
Dirty tube pins and socket, cold solder joint, stray tiny strand of wire, clean the entire area around the oscillator tu...RodB — 08:43 PM
Philco 91 code 221
I have been restoring one of these sets and switched it on yesterday. It didn't exactly spring into life, but after a co...Philconut — 08:26 PM
Philco 50-925 antenna connections
That's super. Glad to hear you figured it out. Paul.Paul Philco322 — 11:11 AM
Philco 50-925 antenna connections
Hello Keith, great news !! Sincerely Richardradiorich — 02:14 AM
Philco 50-925 antenna connections
Finally, got the antenna fixed (repaired some broken wires) and have the radio playing. I've got four different schemat...keith49vj3 — 09:38 PM
1949 Motorola 5A9M
Bob, Nice radio.  I’ve not seen one before.  Keep us updated!Joe Rossi — 07:56 PM
Phioco 90 Power Transformer Wire Colors
Thanks for adding that information.klondike98 — 06:09 PM
Phioco 90 Power Transformer Wire Colors
Although I have used this site as a resource for a number of years this is my first post.   I am restoring a Model 90 si...vincer — 05:02 PM
My collection presentation
There is a complete instruction how to solve your problem. One piece of advice - be careful with the low-voltage capacit...Vlad95 — 09:32 AM
My collection presentation
Vlad; I thought your brown RCA portable looked familiar, I have one that is very similar, the RCA-Victor model BX-55....Arran — 02:31 AM

[-]
Who's Online
There are currently 701 online users. [Complete List]
» 2 Member(s) | 699 Guest(s)
AvatarAvatar

>
  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration