[Milsurplus] sweep tubes

[Hue Miller]

I did some looking at sweep tube specs in thinking about a 2E22 replacement. The 

problem with most sweepy tubes is the suppressor is internal connected to the

cathode. Not to mention the question of how to install it. I would not actually

want to remove the original socket in the transmitter.

 

One of the coolest tube subs i have ever seen was from Max Kaplan, showing me

his Torn.E.b. receiver. The RV2P800 tubes cost generally around $30 each, for a tube

that is basically a 1T4 but 2V 0.2A filament. These are German tubes that mount 

flush into recessed sockets, the tubes look like ammo for an RPG and have removable

extractor knobs on top. He had somehow demounted the guts of the tube, retained the

base and extractor, and mounted a US standard 7 pin socket in it. So when you pulled

the extractor knob and removed the tube, it revealed a 1T4 socketed there. However

due to the filament difference you have to do all four in the receiver, no mix & match.

 

I think the 'tube substitution' subject will be an increasingly popular one as prices for

some of the rarities continues to, as the saying goes, "skyrocket".

-Hue