In article ,
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.

In that time frame, you could buy the front and rear portions of a dual
pot seperately and snap them together. There were versions where one
shaft turned both and other versions where the front pot had a hollow
shaft and the rear shaft fitted inside it, and they could be turned
independantly. If the second case is what you need, just use 2 seperate
pots. For the first case, you are probably SOL.

--
Rich Greenberg Sarasota, FL, USA richgr atsign panix.com + 1 941 378 2097
Eastern time. N6LRT I speak for myself & my dogs only. VM'er since CP-67
Canines: Val, Red, Shasta, Zero & Casey (At the bridge) Owner:Chinook-L
Canines: Red & Cinnar (Siberians) Retired at the beach Asst Owner:Sibernet-L