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

Bakelite Block 3903N
#1

I am working on a Philco 52b and it uses Bakelite block 3903 N.  I have looked at the reference page on the Wayback machine and it shows its as having lugs 3,5, and 8.  So far so good mine does too.  Then is shows the .01 ufd condenser is connected to lugs 5 & 8.  Close examination of mine before unstuffing reveals wires coming out of the inside and attaching to all 3 lugs.  

   Does anybody have a copy of Ray Bintliff's book to help identify what is the correct configeration?

Thanks,

PS. I am definitely going to buy a copy of his book if I can find one.












It is a mistake to think you can solve any major problems just with potatoes.
#2

https://philcoradio.com/library/index.ph...ondensers/

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry
#3

Thank you Terry but that doesn't add any additional information.  I am hoping to find a diagram that will clear up the connection mystery.












It is a mistake to think you can solve any major problems just with potatoes.
#4

There's also clues if you look at under the chassis layout vs the schematic.

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry
#5

You're right. It looks like lug 3 should just be a support but the work by a previous technician has made a mess of this area. I think I remove the insides more carefully than usual in hope of being able figure it out.












It is a mistake to think you can solve any major problems just with potatoes.
#6

Here it is from Ray's book. Sorry about the size.
Henry


Attached Files Image(s)
   
#7

Much appreciated, radiohenry. This gives me a much greater confidence in the correct confiuration. I have ordered my copy of this valuable reference. I don't know what has taken me so long.

Thanks again,
Dwayne












It is a mistake to think you can solve any major problems just with potatoes.




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Part numbers to model cross
Is there a reference somewhere where you can punch in Philco part numbers and see what models those parts were used in?Jim Dutridge — 10:17 AM
Philco 42-345 Restoration/Repair
Hi OSanders, Look carefully at the band switch. Turn it slowly and "wiggle" it around the desired band. ...MrFixr55 — 12:33 AM
5U4 vs 5Z4 tubes
I think that RCA and GE introduced metal tubes in the USA in 1936.  I don't know if they were being made by RCA, GE or b...MrFixr55 — 11:20 PM
Philco 42-345 Restoration/Repair
Vlad95, Thank you for the stringing guides and wow there are so manyosanders0311 — 06:01 PM
5U4 vs 5Z4 tubes
A pre war Hallicrafters, and an early one too, very nice! 1936 is pretty early for metal tubes too, which would explain ...Arran — 05:58 PM
Philco 42-345 Restoration/Repair
Thanks Rod, "When you hear the background hiss and no station it usually indicates that the oscillator quit" ...osanders0311 — 05:52 PM
Philco 42-345 Restoration/Repair
RodB :beerchug:Vlad95 — 10:22 AM
Philco 42-345 Restoration/Repair
Vlad, you nailed it. Swiss and German roots.RodB — 09:54 AM
5U4 vs 5Z4 tubes
Well this is a Hallicrafters SX/9 circa 1936. No real issues so far although I dodged a real bullet with a cap that was...bridkarl — 07:59 AM
5U4 vs 5Z4 tubes
The pinout is the same but the 5U4 has a 3 amp filament, verses 2 amps or less on the 5Z4. I think that the pinout of a ...Arran — 12:04 AM

[-]
Who's Online
There are currently 1477 online users. [Complete List]
» 2 Member(s) | 1475 Guest(s)
AvatarAvatar

>