Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

IF Can Capacitor value (SMD)
#1

Hey guy's I have a Admiral 5R11 with a 5R1 chassis the print is here.

http://www.nostalgiaair.org/pagesbymodel...000103.pdf

It had SMD so I have disassembled and removed the mica and trimmed the paddled so they don't touch.
 the original cans have been replaced ( probably smd), the resistance of the new cans is the same at 24 ohms per coil 455kc

There is silver mica disease so my problem is this. What value for the caps? The print shows nothing, is there any way to ball park the PF value or do I just start subbing values, if so what is a starting point 130pf? 

Thanks Eric
#2

Hey Eric, start by lightly tacking in 100pf caps on both transformers. Then try your radio and see if you can get it to peak out and receive. If 100 pf doesnt work, go up to 110, then 120, then 130pf. Just lightly tack the leads to the transformer terminals so you can remove them to try a different value. I've read that restorers are using 100pf caps in the IF cans, but 100pf doesn't work al the time. I recently restored a Philco 53 - 564 and 100pf caps worked on the first IF transformer,  but I ended up using 120pf in the second IF transformer.  Just experiment and you will get it. Just take your time.




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
12' Philco
If it is 12', either Kareem or Andre would have to jump pretty high to look at the front panel. Kareem would have an e...morzh — 01:48 PM
12' Philco
And here's a story about the tires on the truck. Same "no-stoop" guy must have installed these! Take care a...GarySP — 01:17 PM
Hickok AC51 tube tester
I think they have only shown the secondaries of the transformer. Two of them feed the rectifiers' filaments.morzh — 12:58 PM
IF can wire size and Rubber mounts?
Arran If the wire inside cans is the gauges you mentioned, the sole reason for that would be mechanical, to stiffen t...morzh — 12:56 PM
12' Philco
Rod, Yes, I know, but the Giant Philco is not around anymore either, so I go by whoever was alive fairly recently. H...morzh — 12:54 PM
Hickok AC51 tube tester
Absolutely no one is going to reverse engineer that circuit. Even the iron core is missing.RodB — 10:37 AM
IF can wire size and Rubber mounts?
Thanks to both members for your help regarding wire and tuner mtg supports. regards--Johngeorgetownjohn — 09:33 AM
Hickok AC51 tube tester
Note that no power cord, power switch, or power transformer switch are shown. That (along with my experience with full s...DaleHCook — 07:09 AM
IF can wire size and Rubber mounts?
A pair of wire strippers can give you an idea of what the existing gauge of the wire leads are in the IF can, I think it...Arran — 06:07 AM
My last cabinet for this year
Hello Dan, That is really beautiful what great looking radio you have ! I have friends who live in Calgary and the wea...radiorich — 01:51 AM

[-]
Who's Online
There are currently 4454 online users. [Complete List]
» 5 Member(s) | 4449 Guest(s)
AvatarAvatarAvatarAvatar
Avatar

>