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

37-675 re-cap
#1

Hi Guy's,
Looking at re-capping my 675 chassis, and noticed that electrolitics are not marked as far as voltages on the schematics.
Does anyone know what the corrct voltages are, or can I just use 450 volt for all?
murf
#2

Those on my Philcos were mostly 475V but I use 450V across the board so far.

If you are looking at the rectifier filtering cap and B+ caps.
#3

I think that 450V caps will be fine, as the new caps handle voltage better.

BUT... you might want to actually measure the V present there to be sure. Since house voltage is now in the 120-125V range the actual V present may be much higher than what is was using 110 or 115V that the set was designed for.

The solution IF this is true is to either use 500V or 600V caps OR use a system to reduce the voltage going into your set to 110-115V.
#4

Got it.
Thanks for the help.
murf
#5

How about the odd value dogbone resistors?
I have found that some of them are not available in the value specified on the schematics.
Is it ok to go to the next lower or higher value, or do I have to stack them to get the closest value?
Still learning a radio at a time.
murf
#6

Should be ok. I think the resistors in the set are 20 percent so that give you a pretty good range to choose from.
Terry




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Shadow Meter Bulb
Phorum members, I am trying to find the bulb # for PHILCO Shadow Meter part number 45-2180 that is from a 37-640 chassis...georgetownjohn — 06:53 PM
Philco 41-608 changer coupler
3D-printing...short of machining, of course. Or molding.morzh — 05:20 PM
Philco 41-608 changer coupler
Thanks, Morzh. That solves the issue of the rubber pieces. Now, I need to find a way to replicate the pot metal piec...alangard — 05:07 PM
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

[-]
Who's Online
There are currently 4958 online users. [Complete List]
» 1 Member(s) | 4957 Guest(s)
Avatar

>