[Amps] Measuring Grid Current in GG Amp

[Jim W7RY]

Why don’t you want to float the ground?

It's easy to protect circuitry with a properly connected diode along with 
the resistor between B- and ground.

Enlighten us please Charlie.

73
Jim W7RY


-----Original Message----- 
From: Charlie
Sent: Tuesday, November 10, 2015 6:33 PM
To: amps at contesting.com
Subject: [Amps] Measuring Grid Current in GG Amp

Folks-

In a GG amp, suggestions on how to measure Grid current WITHOUT the typical
semi-floating B-.

Using a SMPS. Plate current and Voltage are present as 0-5 volt full scale.

1) Measure Cathode current across Rk, and subtract Cathode I from
Plate I in an op amp to derive Grid I?

2) Untie the grid from physical ground, RF ground with caps, measure
Grid I across a small resistor?

3) ?

Thanks for flexing the gray matter.

73 Charlie N6CFH
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