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

Ready for 41-290 upgrade
#1

OK, I am ready to start on the electronic restoration of my 41-290. I pulled down the "Replacing Capaciators in Old Radios" article off the Philco web site. Here is what I came up with taking readings off the caps themselves:
Non Electrolytic paper caps:11
2X .o5 mfd/200 Volts
1x ? mfd/400 Volts (part # 30-4518s)
4x .01 mfd/400 V (part # 30-4572)
2x.003 mfd/?V (part 4469)
1x .002 mfd/?V
1x ? mfd/? V (part 4472)

Two Electrolytic Caps
1x 12 mfd/400v (axal lead)
1x ? mfd/400 v (dual lead on one end)
The schematic I pulled down off the web at Nostalgia Air is in a very small font and I have trouble reading it. Also, it doesn't have the same complete parts list like I have seen on the some of the Zenith Schematics that inlude mfd and Volt rating in the parts table.
So, can I use the standard orange drop capacitors to replace the paper non elctrolytic using .05 .01, .033 and .022 replacements? Can somebody help me with the unknown Voltages and Mfd rates shown above?
As to the electrolytics, have I identified them all? Of the two I have id'd, can I use a 22mfd/450 or 630Volt replacement for the 12 mfdx400 V? What about the second one? Both of these were found underneath the chasis held in place with a soft metal clip to the chasis. Also, I can't seem to find a dual lead Electrolytic cap in my RD catalogue. Any tips?
Any assistance would be greatly appreciated.

Thanks much, MG


Messages In This Thread
Ready for 41-290 upgrade - by madghost - 11-23-2005, 06:37 PM
[No subject] - by Ron Ramirez - 11-23-2005, 11:45 PM
READING SCHEMATICS - by madghost - 11-24-2005, 02:07 PM
[No subject] - by Ron Ramirez - 11-24-2005, 02:18 PM
[No subject] - by Chuck Schwark - 11-24-2005, 09:37 PM
tv input - by Guest - 12-14-2005, 08:12 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
Hi OSanders, Look carefully at the band switch. Turn it slowly and "wiggle" it around the desired band. ...MrFixr55 — 12:33 AM
5U4 vs 5Z4 tubes
I think that RCA and GE introduced metal tubes in the USA in 1936.  I don't know if they were being made by RCA, GE or b...MrFixr55 — 11:20 PM
Philco 42-345 Restoration/Repair
Vlad95, Thank you for the stringing guides and wow there are so manyosanders0311 — 06:01 PM
5U4 vs 5Z4 tubes
A pre war Hallicrafters, and an early one too, very nice! 1936 is pretty early for metal tubes too, which would explain ...Arran — 05:58 PM
Philco 42-345 Restoration/Repair
Thanks Rod, "When you hear the background hiss and no station it usually indicates that the oscillator quit" ...osanders0311 — 05:52 PM
Philco 42-345 Restoration/Repair
RodB :beerchug:Vlad95 — 10:22 AM
Philco 42-345 Restoration/Repair
Vlad, you nailed it. Swiss and German roots.RodB — 09:54 AM
5U4 vs 5Z4 tubes
Well this is a Hallicrafters SX/9 circa 1936. No real issues so far although I dodged a real bullet with a cap that was...bridkarl — 07:59 AM
5U4 vs 5Z4 tubes
The pinout is the same but the 5U4 has a 3 amp filament, verses 2 amps or less on the 5Z4. I think that the pinout of a ...Arran — 12:04 AM
Philco 42-345 Restoration/Repair
By the way. osanders0311 Take a look here: Dial cord stringing Guides May be here you can fount correct string settin...Vlad95 — 11:15 PM

[-]
Who's Online
There are currently no members online.

>