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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...
________________________________________________________________________