[ARC5] My ARC-5 40 meter station

[Charles]

-----Original Message----- 
I see in the linear another glass tube - is that a driver? Looks like a 4-65 
or some such.

Roy

Roy Morgan
RoyMorgan at alum.mit.edu
K1LKY Since 1958
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That is indeed a 4-65A, but it's a shunt regulator for the screen supply, 
fed from the "economy" supply (center tap of the plate transformer) which 
provides about 1600 volts. My Thordarson plate transformer has three 
insulators of equal size on its HV winding with CT, so I figured the 
insulation would be safe in this configuration. So far so good, despite 10 
years of storage since I even fired it up last time.
I'm running 450 volts on the screens which seems to be just about right in 
AB1 at 3200V plate.

-Charles
WB3JOK since 1976 :)