Well Jim,
Im changing my 2@3-500Z amp to a single GS-35B and in the spec's for the tube
it states that the warm-up time is Aprox~ 2 minute. So instead of using a
power SCR in the mains to switch on the HV bank( and probably darn slow to
disengage if a fault occurs) I would like to use a Vac relay - probably close
to the Plate choke since i have room in that compartment and a delay circuit is
darn easy to DIY.
Mike
KC7NOA
### U don't need it. [ And u don't need to delay the B+ on a 8877 amp, or
any other oxide tube either.] My buddy just finished a 2 x GS35B for 6m.
We just inhibit the key line for 2 mins. In the meantime,
the filS are warming up.. and B+ is going through it's step start sequence
etc, etc. The tube is cut off anyway, no current flow. All you want to do
is inhibit drive.. AND also inhibit the tube from drawing ZSAC !
## GS35B runs superb on 6M [and HF]. Things get better with more B+. We
tried it with as high as 5.6 kv [ no load].... then backed it way down. It
now sits at 4300-4700 vdc no load. Drive it with a FT-2000 on 6m
and it really cranks out the power. Since 2 x tubes are used...separate
adjustable bias controls are employed.
Later........ Jim VE7RF
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