[Amps] 3 phase HV transformer using 240 single phase

[Paul Elliott]

Richard

I have been using a three phase transformer on single phase for several
years.  Two of the primaries are in parallel (240 vac), their secondaries
are in series--the third bank is left floating.  The series aecondaries are
bridge rectified--has 26 mfd on the output and a fairly stout bleeder (have
forgotten the exact value).  No load voltage output is 4000 vdc--with a 500
ma load by my homebuilt 8877 amp voltage drop is about 150 vdc.  The
transformer is a brute--about 100 lbs in weight.  I use a step-start not
only to protect the components but also to keep from tripping the breaker
when I turn it on.  I have forgotten exactly what the primary resistance is,
but it is very low.

The supply has work flawlessly.  I work mainly cw.

Good luck.

73 Paul W5DM  A ham for over 71 years

  
-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of Richard Sisson
Sent: Tuesday, May 06, 2008 01:27
To: amps at contesting.com
Subject: [Amps] 3 phase transformer

since no replies so far on another post, I will ask a more simple question,
has anyone used a 3 phase transformer on 240 volt single phase in a power
supply to power a hf amp?. will it or could it work using 2 coil windings?
  thanks,
  Richard


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