Re: SS Neon power transformer operation

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

Original poster: "Allanh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <allanh-at-starband-dot-net>

It would make a good DC supply, but the recifiers would need to be the "hot
carrier" type. Similar to those used in computer power supplies. They are
very common but not as cheap as say a 1N4007. The output could be regulated,
but one would need to see a schematic first.

allan

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, November 10, 2002 4:22 PM
Subject: Re: SS Neon power transformer operation


 >
 > Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<dhmccauley-at-spacecatlighting-dot-com>
 >
 >  > Has anyone had experience with the 220V 50 Hz input, 15 kV, 20 kHz 20
mA
 >  > output solid state neon supplies being offered on eBay for $9.99 each?
 >  >
 >  > I know that they are not suitable for TC power work,
 >
 >  >>>>>>>>>>>> Actually, they would be good for DC powered tesla coils.  It
 > would be more easy to rectify DC voltage
 > from these as the ripple frequency would be much higher and the peak-peak
 > ripple would be lower as well.  They won't work
 > for conventional coils though.
 >
 >  > I can easily rig an autotransformer to get 220 volts for the input.  I
 >  > suspect that these use a switching type driver that rectifies the input
 > 110
 >  > Vac line input, and probably wouldn't care much if it was seeing 50 Hz
or
 >  > 60 Hz.  However, I thought I'd ask in case some had an experience
blowing
 >  > one up on 60 Hz power.
 >
 >  >>>>>>>>>>>Actually, you cannot use a variable transformer for these type
of
 > power supplies.  Since these supplies are true
 > switching power supplies, the output voltage is controlled via voltage and
 > current feedback.  Lowering or increasing the input voltage, the
 > power supply will still try to maintain a constant output voltage until
the
 > minimum / maximum input voltage threshold is passed which will
 > probably cause the supply to shutdown if it has internal protection.
 >
 >
 >
 >
 >  > Any experiences would be appreciated.
 >  > Thanks, Dave
 >  >
 >  >