[Amps] SS amps watercooling - was PowerGenius XL

[Jim Thomson]

Date: Sun, 26 Feb 2017 08:38:24 -0700
From: Thomas Walsh <w2co at comcast.net>
To: Jim Thomson <jim.thom at telus.net>
Cc: amps at contesting.com
Subject: Re: [Amps] SS amps watercooling - was PowerGenius XL

FYI Alpha did produce a water cooled tube amp back in 70'
See https://www.alpharfsystems.com/?p=1387
There is probably a good reason they stopped..
W2CO

##  Alpha never produced a water cooled amp.  The 70V  was
vapor phase cooled.   Alpha  stopped making  the 70V after Eimac announced 
they would stop producing the  vapor phase  cooled triode used in the 70V. 
Which I think was the vapor phase cooled version of an 8877.  Back then,
Eimac produced a   lot of vapor phase cooled triodes.   They discontinued
all the smaller vapor phase cooled triodes, and notified Apha at the time.  I
remember at the time, that Alpha notified all its 70V owners, that Eimac would
be doing one last production run of the vapor triodes used, so put in your
order. 

##  Back then, what was left was just the larger Eimac vapor cooled triodes, and tetrodes. 
As of 5 min ago, Eimac depicts only 4 vapor cooled large tetrodes on their site,
and no vapor cooled triodes at all.   Eimac still makes  1-2  multi phase cooled tubes.    

##  So the 70V  was short lived in production.  Cant produce the amp, if eimac doesnt make the
tube anymore. 

Jim   VE7RF