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[AMPS] grid termination resistor value?

To: <amps@contesting.com>
Subject: [AMPS] grid termination resistor value?
From: zeitler@ibm.net (zeitler@ibm.net)
Date: Wed, 27 Jan 1999 19:47:06 -0800
Pls make these public comments. I would like to learn something too.

Lane
ku7i
-----Original Message-----
From: Skip S Isaham <nospam4me@juno.com>
To: amps@contesting.com <amps@contesting.com>
To: <amps@contesting.com>
Date: Wednesday, January 27, 1999 7:35 PM
Subject: [AMPS] grid termination resistor value?


>
>?  I know only too well that, in HF service, tetrodes with >50-ohm grid
>terminations are more likely to turn into surprise oscillators if they
>are not neutralized.
>
>So how is the grid termination resistance value selected?
>I've seen amplifiers with 50 ohm termination values going higher.  With
>higher resistance values, I've seen toroid matching transformer networks.
>
>Is there a guideline for the selection of a grid termination resistor, or
>is it done by method ?
>
>thanks
>skipp
>nospam4me@juno.com
>
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>


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