New Philco 20 Filter Caps...In, but Another Question??
Posts: 2,353
Threads: 92
Joined: May 2010
City: Clayton, NC
It could be that you are drawing additional curent, possibly through an un-replaced cap down the line.
Agree, finish the re-cap, then address the power resistor issue.
Posts: 31
Threads: 5
Joined: Feb 2012
That makes excellent sense. Thanks!!
Posts: 2,353
Threads: 92
Joined: May 2010
City: Clayton, NC
Current.....
Jeez, my teachers learned me good.
Posts: 31
Threads: 5
Joined: Feb 2012
TA.....no problem...I understood your post very clearly
Posts: 7,305
Threads: 270
Joined: Dec 2009
City: Roslyn Pa
I'll mention in passing that it is important that the input filter cap (#26 pins 1-2) should not exceed the capacitance value of the original. If it does it can give you a much higher plate volt than is shown on the diagram and will cause the B/C resistor to get very hot!!!
Terry
Posts: 31
Threads: 5
Joined: Feb 2012
I'm almost done recapping, BUT, I need to know what the values and voltage ratings are of the filter caps (26), between pins 1 & 2, 2 & 6, 1 & 4, 1 & 3 . THANKS!!
Posts: 2,128
Threads: 18
Joined: Oct 2008
City: Merrick, Long Island, NY
Schematic not the best, but I think you would be OK with 10 watts ---- if there is nothing else dragging the rest of the voltage divider down. You will know better once you recap and recarb the set. If you have an analog 250 or 500 ma DCmilliampemer you can see just how much current this resistor is drawing by putting it in seriees with the hot resistor l (+ side to B+. ) I wouldn't expect to see more than 30-50 at most ma load from there. If there's more, something is wrong down the line. But do completely recap first at very least.
Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand
State, Province, Country: Indiana
As for the capacitors in the multi-cap can...it would be best if you use yellow metalized film caps rated at 600 WVDC. You can use electrolytics rated at 450 WVDC for the 1 and 1.5 uF caps but they will not last as long.
--
Ron Ramirez
Ferdinand IN
Posts: 31
Threads: 5
Joined: Feb 2012
Thanks for all your help on this so far guys. I'm going to order the caps, and from reading other posts, I know how to open the can and wire the caps inside when I get them. Learned a lot so far. Thanks again!!
Posts: 31
Threads: 5
Joined: Feb 2012
Hello.......Found Metalized Polypropylene, 630V, aluminum metalized polypropylene film capacitors on Antique Electronic Supplies web site. They have 1.0 1.5 & .15 Will these do?...THANKS!!
(This post was last modified: 01-19-2013, 10:58 AM by Joe.)
Posts: 2,353
Threads: 92
Joined: May 2010
City: Clayton, NC
Posts: 31
Threads: 5
Joined: Feb 2012
Thanks TA...I'll order them now. P.S. Got the top of the can off, with the base still wired and intact. I can clean the can out while I wait for the caps. So far so good. THANKS AGAIN!!
Posts: 7,305
Threads: 270
Joined: Dec 2009
City: Roslyn Pa
Hey Joe
I might have a spare B/C resistor if you need it. Awhile back I ended up with a few extra 20 chassis... Tnx Tom and others.
Terry
Posts: 65
Threads: 12
Joined: Dec 2012
City: TN
Words of wisdom and lessons learned-take plenty of pictures before you disconnect those wires for recapping. I managed to stuff mine with standard orange drops at 630v but it was tight. 450v electrolytics would have given much more room but as Ron indicated, the longevity wouldn't be as good. This is what the wiring looked like inside the can on mine before snipping and removing some of the tar to have room to fit the caps.
[Image: http://i180.photobucket.com/albums/x220/...EF4684.jpg]
[Image: http://i180.photobucket.com/albums/x220/...F4682a.jpg]
Posts: 31
Threads: 5
Joined: Feb 2012
Hello All.....
Want to say up front...thanks for all the posts and help. Here is where I am now. New caps came. Took top of can off, clipped all old wires from the old caps and lifted the can out, leaving the bottom part of the can in; also leaving all the wiring in place under the can. (Did not have to touch that)! So now have 1mf across 1 & 2, 1mf across 1 & 4, 1.5mf actoss 1 & 3, 0.15uf across 2 & 6. (Again, old caps completely out of the circuit). The caps are rated at 630v. P late voltages all within speck. The 10 watt power resistor across b/c pins 1&2 still gets hot to the touch. There is 55vdc across it, and putting an amp meter in series, it is drawing about 33ma. This is the olny component hot to the touch. I have had the radio on now for 5 hours, running like a champ! Aligned it at 1400 on the dial, and the dial tracks. Should I put in a 20 watt 1500 ohm resister, or just snug the 10 watt against the chassis as a heat sink? The resistor has not gotten any hotter. Thanks again everyone. Joe
Users browsing this thread: 1 Guest(s)
|
Recent Posts
|
A Marconi model 86
|
I have recapped this large Marconi model 86. It plays quit good.
I have stripped the cabinet and using Mohawk...Dan Walker — 12:18 AM |
Table radio 51C or 52C?
|
I think what you may have is another Phactory Phranken Philco, if the holes in the front panel lined up it was not unusu...Arran — 10:41 PM |
Philco 42-345 Restoration/Repair
|
Ho OSanders,
Sorry, I got really busy in May and haven't seen your thread in a while. I am VERY sorry about that. ...MrFixr55 — 10:30 PM |
Philco 45L Initial Check Up
|
Dan;
I don't think that the model 45 is especially know for coil problems, not that they can't occur for one reason o...Arran — 10:19 PM |
Philco 42-345 Restoration/Repair
|
Yes, the end with the groove is positive, the stripe with the arrows points to the negative lead. The arrows have minus ...RodB — 09:36 PM |
Philco 42-345 Restoration/Repair
|
Thank you Rod and Paul
I took a break, did some yard work and Rod "Therefore, it appears cap 40 is connected backw...osanders0311 — 06:35 PM |
Philco 45L Initial Check Up
|
Hello,
I am in the process of checking out a Philco 45L. My question is does this model suffer from the Philco coil r...dconant — 06:11 PM |
Table radio 51C or 52C?
|
Purchased a table radio at auction, not because I had to have it, but because no one else bid on it. $5 Unable to fi...antiqueradionut — 05:14 PM |
Philco 42-345 Restoration/Repair
|
The 2 towns you mentioned "Frustrated" and "Give Up" are places we have all been. Relax, take 5, thi...Paul Philco322 — 03:23 PM |
Philco 89 Code 123 Osc Coil
|
Thanks for posting that information!klondike98 — 03:14 PM |
Who's Online
|
There are currently no members online. |
|

|