The PHILCO Phorum

What is the little spring thing just above the mica cap in the attachment photo?  
elfiself

Looks to be a flex resistor w/o it's cover.

Terry why would it be connected between the pin 7 heater of the 50L6GT and the pin 1 heater of the 35Z3?

And so what unknown chassis would this be from????

PT-12 is the best guess. 42-PT10 has the same schematic.  It was removed from a 42-PT3 cabinet.  All original!  Speculation holds the marrage was due to wartime parts shortage. Pictures on the "help identifying a philco model" thread.
Larry (username elfiself)

> Speculation holds the marrage was due to wartime parts shortage.

I don't believe that. The government forced all radio manufacturers to cease domestic radio production somewhere around March, 1942 due to World War II. I don't think Philco would have continued producing radios, even if they had mismatched cabinets and chassis, after the government deadline.

Yes, there is precedent for Philco issuing mixed-up radios (chassis inside cabinets they were not intended for) to use up excess stock, but there is no evidence of this happening in this instance. Now, if two or three more 42-PT10 chassis show up inside 42-PT3 cabinets with no evidence of after-the-fact switching by collectors, I will gladly offer a retraction and apology.

But for now I offer one more comment:

"You don't have to agree with me. You have every right to be wrong if you want to be. Amen?" - Rev. Lowell Mason, RIP

Not a conspiracy to create a special find Ron, just trying to figure out what I have.  I trust your expertise. So what about the spring thing connecting two heaters, one end to pin 7 on the 50L6GT, the other end to pin 1 of the 35Z3.

Hi All
Code 121 - 122 to what does it refer?
thanks
Larry

I think it is the resistive element of the broken resistor, the two pieces of which it is coming out from.

Still wondering about the spring thing.  It seems to have connection tabs rather than leads. Also it is connected between heaters on the 50L6GT and 35Z3.
Thanks Larry

Again. It is a broken resistor.

I've not seen this type of resistor with tabs rather than leads and can't figure why it would be connected between heater pins on two ajacent tubes.
Any thoughts?
Larry

(04-02-2018, 04:03 PM)elfiself Wrote: [ -> ]I've not seen this type of resistor with tabs rather than leads and can't figure why it would be connected between heater pins on two ajacent tubes.
Any thoughts?
Larry

Raises hand..

If the 50L6 was once subbed by a 35L6, a resistor should be added to string, likely best location.. If resistor 30 has been removed or replaced by a lesser value than orig, a "make up" resistor could have been added between heaters of 50L6 & 35Z3...  

If tubes types match the schematic & R30 & 30A are correct value, it can be replaced by a wire & tossed into trash...

wire wound resistor ,,,which loss its cloth cover do to age ???,,,,,they break with JUST your breath,,lol