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Re: [Amps] 3CX800 grid collet or SK1900

Subject: Re: [Amps] 3CX800 grid collet or SK1900
From: Steve <>
Date: Mon, 15 Jun 2015 16:18:15 +0100
List-post: <">>
The grid ring on a 3CX800 is the same size as the screen ring on a 4CX250 so you could dismantle a '250 base to get one.

I've done neutralising with grid fingers at UHF but not seen it needed at 2m.


Hi Conrad, the four finger grid grounding may be there for the purpose of
neutralizing the plate to cathode feedback path.

Sort of like you may have seen individual fingers removed from fingerstock
to create a small inductance from grid to ground.

I have seen many 8877 2m amplifiers that use this technique.

Gerald K5GW

In a message dated 6/15/2015 7:09:42 A.M. Central Daylight Time, writes:

I have a  grounded grid 3CX800 2m amplifier that needs some TLC. One of the
most  alarming things is that the grid is grounded by 4 small pieces of
fingerstock  that has seen better days.  I thought that I would remedy the
situation  and so I am looking for a grid collet or the SK1900 assembly. I have
just  moved to the Netherlands and as yet have not learned where I can buy
suitable  fingerstock that can be formed into a rig.

Any help would be  appreciated.


Conrad PA5Y

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