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

philco 38-116 125 schematic
#1

is there a good factory service information on the 38-116/125 i am having some troubles identifying some resistors. ether i have gone nuts are these 4 band resistors ? i know that other philco radios have good parts drawings


Attached Files Image(s)
           
#2

You can probably use the body-end-dot scheme on these. There was a doggone transition period where the BED was used before the bands became standard. So, if the body is orange, the end band black and middle band red you have a 3000 ohm resistor.
#3

They aren't 4 banded but bed resistors. The the at the top of the first page the predominant color (body) is purple =7. End is black= 0. And middle band (dot) orange =3. Totaling 7 and 4 zeros 70,000 or 70K. The tricky ones are ones that the first two numbers are the same. If you look down 3 resistors below the 70K there's one that just has two colors. First time I saw one of those I didn't take it at face value but scratched my head thought what the heck?? But it's white white yellow= 99K. Nowdays it's replaced with a 100K.

GL

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
#4

so the one in the second photo should be 3k ohms
#5

Looks like it. Body is orange, end looks black and center band looks red. That's 3K.
#6

For the factory service info have a look in the Philco Library - Service Info section:

https://philcoradio.com/library/index.php/service-info/

Here is a direct link to the service bulletin for 38-116 (Code 125):
https://philcoradio.com/library/download...20286A.pdf
#7

Those are the IRC "BT" type insulated resistors. Philco used them heavily, but they turn up in other makes as well, along with early audio equipment. They are read the same as the dogbone type, except that a band is used instead of a dot (some early ones did use a dot). Many times, they are still OK.

Tim KA3JRT




Users browsing this thread: 2 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 5567 online users. [Complete List]
» 2 Member(s) | 5565 Guest(s)
AvatarAvatar

>