Mahoidar wrote:
I am looking for parts to build a portable tube transmitter-receiver
project from an artcle that appeared in the September 1950's QST.
It utilises a dual potentiometer, one gang is 2M ohm, the other is 5K ohms.
The parts list gives the 2M as "RC M13-139" and the 5K as "IRC PQ 11-114".
Do these numbers mean anything to anyone, and if so, please can you explain?
Any assistance will be greatly appreciated.

I think those are numbers from IRC, a company which still exists as part
of the Vishay empire, I think. They are probably not useful.

I think you may be able to get stacking pots still from CTS. And the
Mod-Pot system is still available but relatively low power.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."