[AMPS] alpha input swamp circuit

[Steve Thompson]

-----Original Message-----
From: Lamb <k7fm@teleport.com>
To: Steve Thompson <g8gsq@qsl.net>; amps@contesting.com
<amps@contesting.com>
Date: 12 November 2001 14:14
Subject: Re: [AMPS] alpha input swamp circuit


>
>Steve asked:
>
>". Has the shunt diode idea been tried in practice? Did it
>work above 10MHz? If yes, please let me know which brand and part # was
>used."
>
>In the late 50's, I think it was W6JAT, who worked for Eimac that published
>a circuit of a shunt diode across the input circuit of a 3-1000 amp, using
a
>6X4.  The diode did not have a series R, although it would have an internal
>impedance.  Circuit was claimed to work fine.  I always had a big question
>mark about it.
I can imagine it working with a vacuum diode. No minority carriers and
storage time etc. I've no idea what capacitance a power rectifier tube
represents.

Steve


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