Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

Philco Model 70 and Electrolytics
#1

Hi Everyone,

I'm still working on my model 70.I've just finished replacing the capacitors in the blocks and I wanted to check in on the two Wet Electrolytics before I get started on them. I've read the instructions on the Repair Bench and it looks like I will need a 6uF at 400V and a 10 uF at 475V capacitor to do the repair. Please correct me if I'm wrong.

Also, I read a previous posting that I think Ron made that said you could just buy both at 450volts. Did I understand that correctly and is that what is best?

One other question, does anyone have a preference of a place to purchase these? I'm going to look to see if I can pick them up locally but, I'm not sure I will be able to. I've ordered some things from Just Radios, and he was really great to deal with, but because this will be a smaller order I was hoping to cut down on the shipping from Canada.

Mike
#2

If it were a 500V electrolytic that might present a problem but two 450V of the correct uf rating should do. You can purchase caps from various places, I think both Ron and the repair bench have links. I purchase mine from ebay, along with just radios and Radio Daze. Modern caps are rated at least 10% surge over rated capacity so for a 450 volt cap you are looking at about 495v. Syl posted a nice way to rebuild caps where you screw the top on and it looks rather neat and easy to do. Check ebay item 380096414578, I have purchased from him many times on many items and his prices are fair.
#3

49stud663, thanks for the info and for the ebay suggestion. Syls idea looks pretty good too. I'm not sure which direction I'll go yet, but I'm looking forward to hearing this thing play!
#4

Hi Mike,

6uf is not a standard value anymore. The caps in that radio are not too critical though. You can just use 10uf/450v electrolytics for both of those. As far as purchasing them is concerned, I usually wait until I need quite a few capacitors and order all at the same time, so as to minimize the shipping costs.

Regards,

Ed
#5

Thanks Ed. I wondered why 6 uF was so hard to track down. And you are right, I should have ordered these with the other capacitors, but hind site is 20-20 in this case. This is my first attempt at a restoration, so I'm learning as I go. I decided to order a dozen of them and figured I'd have a few on hand when I move on to the next project. Thanks again for the help, I hope to report that I hear music coming from it soon.
#6

I can still find 4.7's and 6.8's if you really want close to 6uf you can use the 6.8's or go with 10's. I do the same also, purchase 5-10 or so of each common rating so I have some stock and to reduce shipping costs.




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
54C Complete Teardown/Rebuild
I don't think that I have encountered a 12Z3 before, curious how it uses one of those but includes a #43, which is a 25 ...Arran — 02:17 PM
HiFi (Chifi) tube amp build - but my own design.
It's the other forum. I'm also in DIY, but mostly read there. Honestly, I kinda jumped into this without much thought to...TV MAN — 10:43 AM
Philco 71 Code 125
Hello,  I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM

[-]
Who's Online
There are currently 1719 online users. [Complete List]
» 2 Member(s) | 1717 Guest(s)
AvatarAvatar

>