[TCML] Another NST question

[Chris Swinson]

----- Original Message ----- 
From: "Neal Namowicz" <neal at imagesbyneal.com>
To: "Tesla Coil Mailing List" <tesla at pupman.com>
Sent: Saturday, December 08, 2007 12:28 AM
Subject: [TCML] Another NST question


>I thought I had read before that nst's shouldn't (couldn't?) be put in 
>series to double their voltage, that it would be too much of a strain on 
>the secondaries. But, we all know that there's some "wiggle room" in their 
>construction, otherwise we couldn't get away with removing shunts and 
>doubling the ma output. So assuming that one phases them correctly, is it 
>possible to series two of them together? I was thinking 2 9kv/30ma's to 
>give me about 18kv, slightly less if I don't drive it to 100%. I just chose 
>that size because I have them already. Thanks everyone for your input on 
>this.
>
> Neal.

I have linked them in series, but not at that voltage. The problem is they 
tend to be center tapped to ground , IE, +5KV GND -5KV (10KV). If you 
connect them in series then they would flash over on the NST windings (no 
ground connected, I found that out that hard way).

The ones I had were only 4KV and no ground connection. I linked them in 
series and center taped to ground with no problem. Been like that for over 
10 years and still working.

I am not sure if they make them without center taps, someone else may have 
come across them over the years though I have never seen any...

Most link MOT's in series and center tap to ground with no problem..

HTH
Chris