[Amps] 1625

[Glen Zook]

The P&H 400 series amplifiers could be ordered with either modified 1625 tubes or 837 tubes.  The "Four In Line" was the ARRL's version of the grounded grid amplifiers using 1625 tubes.  That amplifier was in QST and a couple editions of the SSB Manual.

Glen, K9STH

Website:  http://k9sth.com


--- On Wed, 2/11/09, Carl <km1h at jeremy.mv.com> wrote:

I still have 4 of those tubes with slices in the bakelite where the surgery was performed. They were driven by a 20A to some unknown output power on 80-20M.
 
I believe it was P&H who offered a commercial amp with those tubes.