Rotary cause failure ?

From:  richard hull [SMTP:rhull-at-richmond.infi-dot-net]
Sent:  Wednesday, January 21, 1998 2:00 PM
To:  Tesla List
Subject:  Rotary cause failure ?

>Date: Wed, 21 Jan 1998 04:54:23 -0700
>From: dwight duncan <duncand-at-ccsalpha2.nrl.navy.mil>
>To: tesla-img-request-at-pupman-dot-com
>Hi All,
>    Two days ago I fired up my 3 KW Tcoil and got some impressive results
>for being conservative.  I had spent a few days re-building my supply and
>wanted to take it easy for a while using 1000 rpm on the rotary gap.  Last
>night I took photo's of the unit and between frames increased the speed of
>the motor.  After about 30 seconds at 2400 rpm one of my transformers
>again, died.


>Thanks all for any input.

If your tranny's are neon sign types, they were doomed with a rotary in
circuit. Synchronous or not, Rotary gaps chew up and spit out neon transformers!
They are just too high an impedance to use with faster quenching systems at
high power levels.  This is regardless of any and all protection. 

Richard Hull, TCBOR