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

Philco 46-1203
#16

It doesn't matter. If the value is small and you can omit using electrolytics, do so - electrolytic caps are a limited life part.
But if you do use them, observe the polarity.
#17

Thanks Skyscraper. The caps in question are 10MF and 40MF. Due to their higher value, would it be okay to use an electrolytic? Which would be better?

Here is the schematic and diagram: http://s270.photobucket.com/user/Colorad...ent&page=1
#18

Those have to be electrolytics I think. I also think it is a doubling rectifier so the voltage ratings you use have to be about 350V. That is 250V DC will not be exceeded if the load is disconnected (hence the 350V rating to have margin) and normally it is lower (175/110V for 40uF and 10uF respectively) but this is if the load is OK.

So, use electrolytics 40uF and 10uF 350V.
#19

Thanks to everyone for their assistance. The 60hz hum is now gone and the radio sounds pretty good for having the original (from what I can tell) speaker. Now on to the record player portion of the unit.
#20

The cap with the wire wrapped around it is a crude LC circuit intended to make the chassis have a low impedance connection to the radio B- supply line at the IF or RF frequencies, but have the impedance be somewhat high at 60Hz. Radio could oscillate without it. You could carefully slide the coiled wire off the old cap, keeping the turns spacing the same, and putting the coil over a new cap.
[Image: http://www.philcoradio.com/phorum/attach...p?aid=2757]




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
So far still no broadcast, I am posting pictures of #14 Oscillator and also a resistor #27 which connects to an XXL tube...osanders0311 — 04:02 PM
Part numbers to model cross
I believe there is that document, and I think we might have it in the Library.morzh — 03:29 PM
Philco 42-345 Restoration/Repair
Ok MrFixr55,  I have tried the DeoxIT D5 on the band switch and even though it has relieved the tension I felt when turn...osanders0311 — 11:11 AM
Part numbers to model cross
Is there a reference somewhere where you can punch in Philco part numbers and see what models those parts were used in?Jim Dutridge — 10:17 AM
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

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

>