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Re: [TCML] why do variacs cost so much?



.........All were purchased within the last 3 years!

Regards,
bob

----- Original Message ----- From: "Jim Lux" <jimlux@xxxxxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Thursday, July 12, 2012 9:52 AM
Subject: Re: [TCML] why do variacs cost so much?


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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