Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

battery pack for Philco 39-85 121
#4

Tank, I certainly agree with the above comments on replacing caps and checking resistors. However I am concerned about your comment of your A pack of batteries giving 3V. Being twice as high as it should be, those tubes would not last long. You really need to check how those batteries are wired together. They don't "glow" much, in fact hard to see them glow without turning out the lights. If you saw them glowing, probably running too high on the filament voltage. Check the A pack and then check the tube filaments by removing one at a time and using an ohm meter check each for very low resistance. Let us hope, you have not taken out all of the filaments in the tubes. Must get that voltage down to about 1.5V. Report back on your findings and good luck on your first radio. Always memorable and will lead to working on even more.

Jerry

A friend in need is a pest!  Bill Slee ca 1970.


Messages In This Thread
battery pack for Philco 39-85 121 - by Tank - 07-27-2012, 04:34 PM
RE: battery pack for Philco 39-85 121 - by jerryhawthorne - 07-28-2012, 05:49 PM
RE: battery pack for Philco 39-85 121 - by Tank - 08-01-2012, 03:47 PM
RE: battery pack for Philco 39-85 121 - by Tank - 08-02-2012, 12:15 AM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
hello david, I have a similar generator in my collection that features a cast iron, single-cylinder Briggs & Stratt...radiorich — 01:00 AM
under chassis parts locator diagram for 1938 Zenith 9s262
Has anyone gone to the trouble of creating an under chassis parts locator image?  Yes, I can identify components by foll...bobloney — 08:57 PM
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
Try looking at this site the book mark is for a old generator that I was given. David    https://radionerds.com/index.ph...David — 08:36 PM
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
Hello Everyone, I am looking for voltage identification for all the pin positions on the socket of a CRV-20130 power su...Tonym4704 — 08:16 PM
Philco P45-6365 Universal Transformer Instruction Manual
Can anyone guide me to where this may be found?GRG — 03:00 PM
54C Complete Teardown/Rebuild
I don't think that I have encountered a 12Z3 before, curious how it uses one of those but includes a #43, which is a 25 ...Arran — 02:17 PM
HiFi (Chifi) tube amp build - but my own design.
It's the other forum. I'm also in DIY, but mostly read there. Honestly, I kinda jumped into this without much thought to...TV MAN — 10:43 AM
Philco 71 Code 125
Hello,  I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM

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

>