[AMPS] What (modern) tube to use?

[Joe Subich, W8IK/4]

>
> €   The good news is that the 8171 does not need to be left on because it
> is "instant on".  Thus, it makes no heat when laying in wait.    When I
> ran one, I found that I needed it only occasionally.  During the summer,
> I opened the window to let the heat escape.  During the Winter, I used it
> to take the chill off of the room in the mornings.
>

Still, 550 watts of filament power and 120 to 150 CFM of airflow (Svetlana
data sheets) seem a bit hefty for an amateur amateur amplifier.  Of course,
it looks like one of the 200 watt rigs will drive the 8170 or 8171 to 10 KW
output with a 400 Ohm grid resistor and a 9:1 autotransformer in the input
circuit.  All in all ... not an amplifier really appropriate for amateur
service.

73,
   ... Joe Subich, W8IK/4  ex-AD8I
       <W8IK@IBM.NET>



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