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

[Carl]

Thats why G3SEK had to develop those excellent tetrode boards before WW3 
started in Europe from all the crummy signals.

Carl
KM1H


----- Original Message ----- 
From: "Peter Voelpel" <df3kv at t-online.de>
To: <amps at contesting.com>
Sent: Monday, October 29, 2012 8:33 AM
Subject: Re: [Amps] The GU84B and GU78B tubes / some brief history


> 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.
>
>
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