GG Tetrode/Pentode QRO
The control grid should be connected directly to ground but never allow
the other grids to float. They must either be connected to a standard
bias supply or grounded themselves. If they are floating, they will
pick up a charge and do things you don't want them to do. :-)
Connecting all grids to ground was a common practice in the old days
but is rarely done anymore, due I believe to bad linearity. If you're
only doing CW, FM or RTTY, linearity is not an issue and it should work
fine that way.
Bill, W6WRT
Thanks Bill...
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73's de IZ5FCY Roberto
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