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RE: [TCML] NST Terry filter
Hi Jeremy,
I would not use the heat sink resistor for this application. They are rated
at 7kv max. A 15kv (nice to have working) will be 15,000/.707 ~= 21216 volts
peak.
Spend the money to protect your nice NST. They are getting hard to find. My
15/60x2 are going up in value and I plan to keep them well with the fine
protective functionality of a TF filter as designed. I have no fear of
turning up the variac!
Regards,
Jim Mora
-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Jeremy Chan
Sent: Tuesday, December 08, 2009 7:51 PM
To: TCML
Subject: RE: [TCML] NST Terry filter
Would these resistors do?
http://docs-asia.electrocomponents.com/webdocs/0031/0900766b8003123a.pdf I
found them on RS online as the L100J1K0E is out of stock in Singapore. I am
afraid of arcing to case occurring for these aluminium housed units though.
Jeremy
> Date: Tue, 8 Dec 2009 17:41:04 -0800
> From: bartb@xxxxxxxxxxxxxxxx
> To: tesla@xxxxxxxxxx
> Subject: Re: [TCML] NST Terry filter
>
> Jeremy,
>
> Mouser, Digikey, Newark, and Allied all have the 1k 100W resistor in
> stock (all priced nearly the same).
>
> L100J1K0E is the number to look for. In the NST_Filter.jpg, the -ND at
> the end simply indicates Terry bought them at Digikey (Digikey adds the
> -ND to every part number they have). The E at the end of the number
> indicates a ROHS compliant part (with the E or without is fine).
>
> Take care,
> Bart
>
> Jeremy Chan wrote:
> > Hey all,
> > I am trying to build a terry filter for a 15/30 NST according to the
following diagram:http://www.classictesla.com/download/NST_Filter.jpgbut am
having problems finding the 1K 100W resistors.What is their function, and
would chokes wound using flyback cable rated at 40KVDC on ferrite cores help
in filtering out the hf? If so, how many turns on the chokes would be
required?Also I plan to replace the cap and 10M resistor string with 2 1nF
15KV ceramic caps in series on each side to give 30KV 500pF sans the 10M
resistors. Is that workable?
> > Thanks and regards,Jeremy
> >
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