[Amps] al811h reverse grid current
jim.thom jim.thom@telus.net
jim.thom at telus.net
Sun Feb 22 13:11:37 EST 2026
From: "gudguyham at aol.com" <gudguyham at aol.com>
To: Curt Nixon <radio.ku8l at gmail.com>, Kurt Cathcart
<Kurt at kuhlroad.net>
Cc: <Amps at contesting.com>
Subject: Re: [Amps] al811h reverse grid current
>You did it wrong. ?The GDT do not replace the resistors on the grids. ?You
remove the resistors >and the caps to ground ?on each grid to ground on the
tube socket. ?You directly ground the grid. >?Then one GDT goes from each
filament wire to ground. ?That?s the way it?s done.
Then also wire a 100K @ 3 watt MOF directly in parallel with each GDT.
2 x GDT's required. 2 x 100 k resistors required. GDT's are 160 V
rated. Same as ameritron uses.
Jim VE7RF
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