On 7/12/12 5:29 AM, Bob Arenella wrote:
I have 3 1256D variacs. Picked up one at a ham fest for $50, two others
at a garage sale, $10 each. All 3 cleaned up nice and all work!
73,
bob
N2OAM
yes, but how long ago was that.. I've got a few 40+ year old variacs out
in the garage that I bought surplus 15-20 years ago..
I think the OP was commenting that prices are going up for this kind of
thing and/or that they are getting scarcer in the surplus chain.
Sooner or later, someone is going to make a "solid state variac" kit for
pig powered spark gap TC duty.. Should be easier than a SSTC in some
ways. 15 years ago, I fooled with this using a 555 + FET in the middle
of a bridge rectifier to replace a smaller 4 Amp Variac driving a fan.
It worked ok, but was too complex for the application.
Or, perhaps repurposing inexpensive variable frequency drives use for
induction motors... they typically can adjust both frequency and voltage.
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