Re: [Fwd: Spark gap not firing]

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-uswest-dot-net>" <tesla123-at-pacbell-dot-net>

Hi John C.,

There have been numberous discussions on these
configurations as you know since you were part of them. I
believe the consensus showed that the coilers who lost NST's
in the cap||xfmr configuration were very real and that the
gap||xfmr configuration was best for the reasons stated
previously. In either configuration, if the NST does not
have overvoltage protection gaps, then NST death is almost
certain. I don't think we can adequately say that all these
NST's died for the same reason. But, we can say that the
addition of safety gaps and gap||xfmr configuration is less
of a risk than the other.

Take care,
Bart



Tesla list wrote:
> 
> Original poster: "John H. Couture by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <couturejh-at-worldnet.att-dot-net>
> 
> Ralph -
> 
> I have built and tested several TC's with the capacitor across the NST and
> never lost a NST. I always used a protective spark gap across the NST output
> as I show in my books. These protective gaps would operate once in awhile
> during tests so a high voltage was never across the NST output. I do not
> believe Terry's NST tests prove that the cap across the NST is more of a
> risk than the gap across the NST.
> 
> Terry's test setup does show current spikes in the test circuit but high
> voltage is what damages the windings and the curves  show only normal
> voltages across the NST output. According to the List there have been many
> NSTs destroyed that had the operating gap across the output. The TC primary
> regardless of where the gap is located can have destructive voltages created
> during operation and a protective gap across the output will keep these
> voltages from shorting the windings.
> 
> John Couture
> 
> ---------------------------------------
> 
> -----Original Message-----
> From: Tesla list [mailto:tesla-at-pupman-dot-com]
> Sent: Thursday, February 08, 2001 5:13 PM
> To: tesla-at-pupman-dot-com
> Subject: Re: [Fwd: Spark gap not firing]
> 
> Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>"
> <Parpp807-at-aol-dot-com>
> 
> Hi Bart,
> Every text and pamphlet in my Tesla collection, including Circular 74, shows
> the TC schematic with the capacitor connected in parallel with the NST. Now,
> it suddenly
> registers that these older schematics do not pertain to an NST. Until now, I
> was unaware of Terry's paper on the subject. Thanks for calling this to my
> flickering attention span.
> There is learning taking place but it is very sloooow.
> 
> Cheers,
> Ralph Zekelman