[Amps] al80a

[PAUL HEWITT]

> >  One more comment here,
> Please??  I turned the amp on
> and noted that the
> > plate(anode to the new
> generation) turned a little
> red, indicating that
> > the
> > plate (anode) is drawing
> current !! ( maybe too much??)
> >  Carl / kz5ca
> >
> 	//When you power "on"
> the amp but it remains in
> standby (unkeyed),
> it shouldn't draw any plate
> current and the anode should
> be dark gray.  If
> it's drawing current, either
> it's keyed or its cutoff bias
> isn't there.
> What happens if you flip the
> switch to STBY?  -WB2WIK/6

Or there's a grid to filament short,
while hot or cold.  With an elevated B-
rail and grid metering between B- and
ground,  plate current will flow through
the grid meter shunt and can't be
cut-off.  This is the wrong direction
for the grid meter hence the negative
grid meter reading, the big clue!!
Cheers, Paul

PAUL HEWITT
WD7S PRODUCTIONS
QRO HOMEBREW COMPONENTS
http://wd7s.home.att.net

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