Re: Pushing Neons (fwd)

---------- Forwarded message ----------
Date: Mon, 27 Jul 1998 11:22:19 +0300
From: Marco Denicolai <marco-at-vistacom.fi>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Pushing Neons (fwd)

At 22:35 25/07/98 -0600, you wrote:
>---------- Forwarded message ----------
>Date: Sat, 25 Jul 1998 17:53:00 -0600
>From: terryf-at-verinet-dot-com
>To: tesla-at-pupman-dot-com
>Subject: Pushing Neons
>Hi All,
>        I have been playing with a high performance charging circuit design
>that uses a 15kV 60 mA neon transformer.  I have the design ironed out so
>that when the input voltage is 120 volts, the current is about 8 amps.  The
>output voltage is 15kV and the current is 60 mA (all RMS values).  This is
>charging a 20nF cap to 21 kV peak.  So everything is within specifications
>of the components.  
>        The first problem is when the gap fails to fire or you are turning
>up the variac and the gap hasn't fired yet.  Without the gap firing, the
>neon's input current is 20 amps.  The output voltage is still 15kV but the
>output current is 115mA. 

Please, mind my stupid and simple question, but I don't really understand why
if the gap doesn't fire the NST sinks higher current. Do you mean that if the
gap doesn't fire you reach a point of the AC half-wave (charging the primary 
capacitor) that results in 115 mA of charging current?


 Marco Denicolai                   Vista Communication Instruments, Inc.
 Hardware Development Manager      www.vistacom.fi   

 marco-at-vistacom.fi                 Kaisaniemenkatu 13 A
 fax:    +358-9-622-5610           SF-00100 HELSINKI
 phone:  +358-9-622-623-15         Finland

   Remember, Murphy was an optimist! I am not...