[Amps] The GU84B and GU78B tubes / some brief history

[Peter Voelpel]

The exciter should be better then any linear as IMD is worsened by the amp.

By the way, no European manufacturer ever used triodes for RF amplifiers
except before the time tetrodes were invented.

73
Peter, DJ7WW


-----Original Message-----
From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of Jim Thomson


The 3CX1500A7/8877 and 3CX800 are indeed fine / best of breed SSB linear
triodes, but tetrodes have their own following with RF amplifier designers
and users.

##  agreed.  Look no further than  " ssb systems and circuits", written by a

slew  of collins engineers.   They just love grid driven amps..and just hate
GG triode amps, the rational being that the xcvr has to be as clean as the
GG amp, or imd results  from the xcvr.