Thanks Ian.. I'll add it to the several versions of your board info that I
already have and use.
I know how amplifier metering works. This is a special application.
73
Jim W7RY
-----Original Message-----
From: Ian White
Sent: Tuesday, November 29, 2016 12:14 PM
To: amps@contesting.com
Subject: Re: [Amps] 8877 Grid Connection DC or Not
This reference, page 3 onwards, may explain what everyone means.
http://www.ifwtech.co.uk/g3sek/boards/triode/triode-manual.pdf
That is how it's done in the large majority of HF amplifiers, and in all VHF
triode amplifiers where a well-grounded grid is essential.
73 from Ian GM3SEK
-----Original Message-----
From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Radio
WC6W via Amps
Sent: 29 November 2016 17:36
To: Jim W7RY; AMPS
Subject: Re: [Amps] 8877 Grid Connection DC or Not
Hi Jim,
Why not leave the grid grounded but, just measure the cathode and plate
currents then subtract to calculate the grid current?
73 & Good morning,
Marv WC6W
http://qsl.net/wc6w/
--------------------------------------------
On Mon, 11/28/16, Jim W7RY <jimw7ry@gmail.com> wrote:
Subject: [Amps] 8877 Grid Connection DC or Not
To: "AMPS" <amps@contesting.com>
Date: Monday, November 28, 2016, 7:00 PM
Has anyone run the grid of an 8877
not connected to ground as far as DC is concerned?
I really need to meter the grid current by bypassing the
grid to ground with capacitors and several 10 ohm resistors
in order to meter grid current. Metering grid current by the
CT of the filament transformer, and the – of the power
supply cant be done. Because the power supply – is
directly grounded.
Anyone had luck doing this?
Thanks 73
Jim W7RY
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