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

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
Zenith H725
Ed; One material that I have seen, but never tried for this was material for making exhaust gaskets, it's similar to ...Arran — 11:42 PM
Zenith H725
I just remembered, I have some hi temp silicone rubber material which could do the trick. Or a piece of FR4 laminate. Th...EdHolland — 08:39 PM
Zenith H725
The PSU filter cap arrived today (thank you USPS!) so I will work on that later. Meanwhile, I have the dial, speaker...EdHolland — 06:42 PM
Philco 610B oscillator wiring
Thanks Terry. After checking my notes I think I recorded about -10v at the 6A7 G4/control grid. The screen grid (G3 &...Tubester — 05:59 PM
The list of my radio & TV collection!
Magical chords of forgotten melodies, old nostalgic music on an old radio... Saturday night blues on the Mid-Waves on an...RadioSvit — 12:20 PM
Philco 42-345 Restoration/Repair
Thank you MrFixr55 the issue with this radio is that the internal coil antenna is missing and there was a wire in its pl...osanders0311 — 11:34 AM
Philco 610B oscillator wiring
Regarding the oscillator circuit which is comprised of the 6A7's cathode, control grid, and screen grid. These elements ...Radioroslyn — 10:33 AM
Philco 42-345 Restoration/Repair
Hi OSanders, First off, welcome to the Philco Phorum where Phine Phamily-Phriendly Pholks Phull of Philco Phacts and P...MrFixr55 — 08:41 AM
Philco 42-345 Restoration/Repair
Today I've been reading through the site trying to learn more about this radio. I also soldered the lose power cord cabl...osanders0311 — 08:24 PM
Philco 610B oscillator wiring
Thanks David! I do have that same later prodution model 610 schematic. I've also studied the Philco service bulletins fo...Tubester — 08:12 PM

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

>