The PHILCO Phorum
41-285 capacitor - Printable Version

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41-285 capacitor - herromc - 06-29-2017

One of the capacitors under the chassis has 2 ratings on it, 8 mfd & 16 mfd.   Would I replace it with one capacitor that has a rating of 22 or maybe 33 mfd?


Mike

RE: 41-285 capacitor - Kenneth F. Besso Jr. - 06-29-2017

pictures work ,,really well,,,and ,,or schematic,,,,,,to see what is going on,,,,CHEERS

RE: 41-285 capacitor - klondike98 - 06-29-2017

A schematic can be found here: http://www.audiophool.com/Philco.html
or here: http://www.nostalgiaair.org/pagesbymodel/417/M0013417.pdf

Cap # 27 is a DUAL electrolytic cap with values of 8 and 16 uF.  so to replace it you need two electrolytic caps.  a 10 and a 22 rated for 400 volts or more would work.  

You can see on the schematic where the caps are connected in the circuit.

I'm guessing without seeing a picture but you probably have an aluminum can that contains the two electrolytic caps in one container. There would be two leads for the two positive sides of the caps and the can itself is connected to the chassis as ground as a common negative. Those cans can be opened up and the two new caps inserted. There are lots of threads on restuffing those.

RE: 41-285 capacitor - Radioroslyn - 06-29-2017

+1
#62 is 12mfd cap but nowdays that an odd value, 10mfd is a common value and use that to replace the 12. If you increase the value of that cap it can increase the hi voltage output of the power supply. Years ago the tolerance rating on electrolytic caps were +10% and - 30% meaning a 12 mfd cap could be as high as 14mfd or as low as 8mfd. It's much closer now.

RE: 41-285 capacitor - herromc - 06-29-2017

Klondike98. Actually #27 is a single paper electrolyte.

Mike

RE: 41-285 capacitor - klondike98 - 06-30-2017

Mike,
Are we talking about a Philco 41-285 radio?  Here's the schematic with the two electrolytic caps contained in the #27 part circled in red.  Sometimes they appear as a single paper tube with multiple leads and since the schematic says the common is black, the 16 uF lead is red and it looks like the 8 uF lead is green it probably is.  Still, you need two separate caps to replace it since the positive leads are connected to two different points in the circuit.  Or am I misunderstanding something?  

[Image: https://www.dropbox.com/s/m8nizm5egfmnh4r/41-285.jpg?raw=1]


[Image: https://www.dropbox.com/s/erllewzlacnch31/41-285parts.jpg?raw=1]

Here's an example of a 1942 model that had a single paper tube containing 3 separate capacitors.  I was able to stuff in the 3 separate caps as seen in the pictures.  Sometimes those paper electrolytics are impossible to restuff so you just have to wire the new ones in as best you can.  http://philcoradio.com/phorum/showthread.php?tid=5780&pid=35928#pid35928


How to post pictures can be found here: http://www.philcoradio.com/phorum/showthread.php?tid=29