Re: SIZE of RF chokes?

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

Hi JT,

There are never guarantees with using NST's in TC service.  Many if 
not most members in this group run the input of their 120Vac rated 
NSTs at 140Vac. Do what you are comfortable with.  If you have a NST 
that is rated at 120Vac_in 12KV_out, then this NST will generate 
14KV_out with 140Vac_in. Remember, these are rms voltages.  If you do 
plan on running your NST at 140Vin, then set your safety gap with 140Vin.

Gerry R.


> Original poster: "JT Bowles" <jasotb@xxxxxxxxxxx>
>
> So, you're saying i can run my transformer at 140VAC in, and as long 
> as my safety gap is set correctly, I dont have to worry about destroying it?
>
> sweet. Except ,it is a linear relationship right? if i increase my 
> input voltage by 1/6 previous voltage,
> I should get in increase of 1/6 voltage on the secondary right?
>
> That means if i wire my NST for 140VAC in, 14KVAC comes out, correct?
>
>
> > From: "Tesla list" <tesla@xxxxxxxxxx>
> > To: tesla@xxxxxxxxxx
> > Subject: Re: SIZE of RF chokes?
> > Date: Thu, 24 Nov 2005 10:38:59 -0700
> >
> > Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>
> >
> > Hi JT,
> >
> > Excessively high voltage is what usually kills NSTs.  Use LTR cap 
> > value to avoid resonant charging and a properly set safety gap to 
> > avoid these high voltages.  Yes 140Vac will probably shorten the 
> > life of an NST to some extent.  If you have a properly set safety 
> > gap and an LTR cap value,  you probably shouldn't  worry about this 
> > too much as you wont enjoy the hobby as much.  I run my 15 KV (21 
> > KVpeak) NST's at 25 KVpeak with a SRSG and haven't lost one yet.
> >
> > Gerry R.