Re: Help with my rotary gap (and other tuning problems).....

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>

At 04:02 PM 7/14/2005, you wrote:

> ........
>
> Also, do I need a safety gap literally ON the motor? I have a Terry Filter 
> in line with the coil (which has two spark gaps to the ground), would that 
> suffice? or do I need a whole new gap just for the motor? (it doesn't seem 
> like it)...just by looking at the math of it, it seems I need to get the 
> phasing right on!
....

I put 220V MOVs and a line filter on my motors.  The motor case is grounded 
(RF ground).  If there is a high current short through the motor to ground, 
the MOVs and filter should protect the AC line.

http://hot-streamer.com/TeslaCoils/MyCoils/BigCoil/Rgap.jpg

http://hot-streamer.com/TeslaCoils/MyCoils/SmallCoil/small_ACwiring.jpg

Sleeve bearings will not care about a big power arc.  Ball bearings will 
get damaged and will wear out far faster.  Since the motors are rarely 
used, probably still nothing to worry about.

Cheers,

        Terry