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

old radio philco 3985
#1

I have a radio philco 3985, I want to fix it but I dont know what kind of battery they use and where can I find . Please, I need somebody to help me.
jaimepaz16
#2

Think you meant model 39-85, the 39 indicating year 1939.

Below is the schematic link. Uses 2 batteries, 1.5V high current for the filaments and 90V low current for the plates. However the batteries are obsolete but a 1.5V D cell and 10 transistor batteries wired in series will work assuming they will fit inside the radio. Richard

http://www.nostalgiaair.org/PagesByModel...013312.pdf
#3

Just be sure you connect the batteries to the right plugs. They appear similar on that schematic. 90V mistakenly connected to the tube filaments will fry the tubes instantly. I have a lot of battery sets using modern equivalent batteries that I build myself, as described. If you are unsure how to connect them, feel free to contact me by email and I can supply some pictures of how it is done. I can then post them on this thread for others, but I have so much stuff I need to know specifically what you need so you do not go into information overload.

Ron Mc/
#4

Here are some pictures of mine and some I found on the net that show examples of 1.5/90V combination A-B batteries.
[Image: http://i75.photobucket.com/albums/i305/m...pboard.jpg]
Note that they use several 1.5 batteries connected in parallel (all the plus ends connected together and all the negative ends connected together) so that the useful lives of the A battery and B battery will be nearer the same. The voltage is still 1.5 volts, but the amp hours add together.

Ron Mc/




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 5492 online users. [Complete List]
» 3 Member(s) | 5489 Guest(s)
AvatarAvatarAvatar

>