[Amps] Curious About Design Specs For Vapor-Phase Cooled PA

[Paul Nix]

Hello;

I've been fascinated with vapor-phase cooled amps ever
since I was a kid and read the article in 'QST' (~1965)
on 'The Stanley Steamer'.

It used an EIMAC 4CX1500 that had the anode cooler
converted to a 'pineapple' design for efficient cooling
by 'boiling-water'.

I believe that it was probably the
forerunner to the Alpha PA70V.

Does anyone know of any design specs
on the design of the 'pineapple' structure ?

I've gone through some old tube manuals, plus done
some searching-on-the-Web, but all that I've found
are a few pictures that show some big shortwave
tubes with the 'pineapple' cooling structure but no
design specs/papers.

I think it'd be fun to take a small external anode tube
(and cheap if it got broke!), remove the air cooled
anode fins and attach a 'boiler'.

Comments would be appreciated.

Paul, WB5AGF