Gents,
My Commander 2500E never makes a "thump" when I turn on
the a.c. mains. :)
However, the 3,100 V.D.C. HV supply is instantly applied
to the cold anodes of the three 3CPX800A7 triodes. :(
In addition, more often than not, the blower motor does not
start spinning and I need to go inside the amplifier and give the
squirrel-cage a push with an orange stick or a straw to get it
going!
For a timely comparison I contacted Ray at QRO, but he refuses to
build me a three tetrode 4CX800 amplifier that seems to use the very
same blower. I would be curious if the turntable-style shaded-pole motor
driving the blower cages actually need the full EMF that the soft-start
modules both the 2500E and the Mark III amplifiers sport?
Respectfully,
Hal Mandel
W4HBM
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