Re: Variac setting (Was Rd: Rotaty popping)

• To: tesla-at-pupman-dot-com
• Subject: Re: Variac setting (Was Rd: Rotaty popping)
• From: Esondrmn-at-aol-dot-com (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Thu, 27 Apr 2000 18:35:02 -0600
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

In a message dated 4/27/00 4:19:56 AM Pacific Daylight Time, tesla-at-pupman-dot-com 
writes:

<< 
 Hi Ed, 
 
 In this reply you made to John, I noticed your variac setting and reaction to
 change is **identical** to my variac setting and reaction. I too have little
 change in performance with movement of the wiper to about 25% or so. I also
 find my best performance just about center of the variac. This makes me 
wonder
 why we are seeing such a similar reaction. I believe we are both using a 
variac
 and series resistor combo (my smoothing resistor is 2.5 ohms). I wonder if
 others using this setup with a pig or potential xfmr are seeing the same type
 of reaction? I find this fascinating - because I don't understand why. Your
 ballast is a 40A and my ballast is 30A. BTW, I measured my variac (setting at
 mid winding) at 11.2mH. I would assume yours is a bit more (maybe 16mH or 
so). 
 
 Does anyone else see this similarity? Does anyone have a theory why? 
 
 Bart  >>

Bart, 

I have a LCR meter, I will measure the inductance of my ballast variac this 
weekend and let you know what I find.

Ed Sonderman

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