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

[Paul Christensen]

Ian,

If you could list the top few important parameters to low distortion tetrode 
sign, what are they?  I think most of us know the importance of 
well-regulated screen voltage.  Other top factors?

Paul, W9AC

----- Original Message ----- 
From: "Ian White GM3SEK" <gm3sek at ifwtech.co.uk>
To: <amps at contesting.com>
Sent: Monday, October 29, 2012 11:28 AM
Subject: Re: [Amps] The GU84B and GU78B tubes / some brief history


> Carl Wrote:
>
>>> By the way, no European manufacturer ever used triodes for RF amplifiers
>>> except before the time tetrodes were invented.
>
>>Thats why G3SEK had to develop those excellent tetrode boards before WW3 
>>started in Europe from all the crummy signals.
>>
>>Carl
>>KM1H
>
> Not quite... I originally developed the Tetrode Boards because of all the 
> crummy signals from 4CX250Bs!
>
> The differences between triodes and tetrodes are far less important than 
> the differences between individual amplifier designs, and the ways that 
> individual people try to operate them.
>
>
> -- 
>
> 73 from Ian GM3SEK
> http://www.ifwtech.co.uk/g3sek
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