"John Byrns" wrote in message news:byrnsj- Why would
one want to do this vs. simply driving the control grid as
intended? The only reason I can see is higher potential power output
due to increased peak plate current, assuming the tube can tolerate
abnormally high peak screen voltages while the plate voltage is low.
Exactly! To achieve the same high plate current at a low plate voltage in a
conventional triode would require higher (control) grid current, though the
positive grid voltage might be smaller compared to driving a beam tetrode
via g2.
And you know, a screen grid does tolerate high peak currents at a constantly
high voltage (in a conventional pentode operation). Therefore it can
tolerate the same instantaneous operating point in a
quasi-triode-screen-driven configuration.
Regards,
Alex
Regards,
John Byrns
Surf my web pages at, http://fmamradios.com/