|Subject:||Re: [Amps] 3CX800 grid collet or SK1900|
|Date:||Mon, 15 Jun 2015 16:18:15 +0100|
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. 73, Gerald K5GW In a message dated 6/15/2015 7:09:42 A.M. Central Daylight Time, email@example.com 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. 73 Conrad PA5Y
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