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

Thread Closed

Philco 96 work around?
#1

I've started work on a cosmetically nice Philco 96 (one of Philco's last TRF sets, I believe). This set seems clean yet it has a lot of electronic problems with open power resistors, coils and an open input transformer.

The primary of the input transformer (no. 38 in schematic) from the plate of the 27 first audio tube to B+ is open. Secondary goes to push pull 45s and is OK. Question: I know it will be difficult to find another input transformer to drop in so can I use RC coupling as a work around for this set? I have done similar things with battery sets with open interstage audio transformers. I've used about 22K resistor across the open primary and a 0.05-0.1uF capacitor between the primary and secondary of the transformer. Do you think that would work here?
I've attached part of the schematic showing the input transformer.

Thanks,
Mark
   


Messages In This Thread
Philco 96 work around? - by retiredinprescott - 07-12-2013, 09:34 PM
RE: Philco 96 work around? - by codefox1 - 07-12-2013, 10:14 PM
RE: Philco 96 work around? - by BrendaAnnD - 07-12-2013, 10:23 PM
RE: Philco 96 work around? - by jerryhawthorne - 07-12-2013, 11:11 PM
RE: Philco 96 work around? - by Ron Ramirez - 07-13-2013, 07:22 AM
RE: Philco 96 work around? - by retiredinprescott - 07-13-2013, 08:48 AM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
That looks a lot like an aircraft connector of some kind, even if it's a U.S.N power supply. I have a book somewhere abo...Arran — 02:56 AM
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

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

>