Tom Rauch wrote:
>
>Ground the grids, or at least bypass them thoroughly and get rid of
>that nonsense. Use a conventional metering system.
>
There is indeed a "conventional" metering system that allows you to
ground the grid directly, and still be able to measure grid and anode
currents separately. Unfortunately this is another area where there's a
lot of "monkey see, monkey do", so you can't reliably copy just any
published metering system. Some contain serious technical mistakes -
they either measure the wrong things and/or fail to protect both meters
adequately.
There's an article about this on my web site, at:
http://www.ifwtech.com/g3sek/boards/triode/triode-3.htm
(Disclaimer: this page is technical background material for a commercial
product. It's there so that you can do your own thinking about the
technical issues.)
73 from Ian G3SEK Editor, 'The VHF/UHF DX Book'
'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.com/g3sek
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