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RE: H&R Transformers

Subject: 
        RE: H&R Transformers
  Date: 
        Fri, 14 Mar 1997 12:38:00 -0500 (EST)
  From: 
        Benson_Barry%PAX5-at-mr.nawcad.navy.mil
    To: 
        tom_mcgahee-at-sigmais-dot-com
    CC: 
        tesla-at-pupman-dot-com


TRANSFORMER, PHOTOCOPIER, H & R
Hi Fr. Tom McGahee, All,
     I started using these transformers after seeing
a system built with them in the T.C.B.A. news.  I have been
able to get 56" of spark with 120VAC before tripping the
breaker with a 6" X 27" X #18 gauge magnet wire wound
secondary terminated with a 4 X 20" toroid using a 0.06 uF
capacitor and 14 point X 10" diameter X 1725 RPM driven
rotary wheel using 8-32 stainless steel screws with 4
parallel sets of 1/8" stationary tungsten rods.

When I first bought a pair of these transformers 10 years
ago I cooked both of them.  The high voltage winding lead out
was put too close to the low voltage side of the winding.
When stressed with Tesla coil use without protective gaps
it arced over and made one the transformers useless.  I
rebuilt the other by scraping off the carbonized insulation
and repotting with RTV.  I now run with safety gaps and
a 4" X 3" X 1" cross section cored common mode choke
with 100 turns for each side.  This limits the current and
protects the transformers from RF spikes.  I ordered a
new transformer recently that came with silicon rubber
insulated wires for the high voltage lead.  This is a vast
improvement.

These are serious transformers.  They are like mini
pole pigs.  I suppose that if you put one in oil that it
would be indestructible.  I have been thinking of using
six of these transformers with primaries in series parallel
for running 10 KW off of 220 VAC.

Barry

 ----------
From: "tom_mcgahee"-at-sigmais-dot-com-at-PMDF-at-PAXMB1
To: Benson Barry
Subject: H&R Transformers
Date: Tuesday, March 11, 1997 9:09PM

<<File Attachment: 00000000.TXT>>
Barry,
I included information you posted on February 11 to Malcolm Watts in the
following post that I have sent out to the Tesla list. I am sending this
copy direct to you, because I would appreciate it if you would send a
post
concerning your use of this type of transformer to the Tesla list under
the
subject heading "RE: H&R Transformers"

In particular, if you could share with the rest of us your impression of
this transformer, and any pertinent details about using it that you can
share with us. Like, did you remove the shunts? Do you use the AC
capacitor
that it came with? Are you happy with the transformer? I know that you
are
probably very busy (as we all are), but this is something that you could
share with us that would be most useful. I will be looking foreward to
hearing from you. I would appreciate it if you would CC me a copy of
your
response when you send it to the Tesla list, as this will allow me to
read
your response earlier.

Thank you for helping Malcolm, by the way. I hope that I can perhaps get
you to fill in a Project Coiler form some time in the near future.
Project
Coiler is my ongoing attempt to gather information on operational coils
and
make this information available to all interested persons on the Tesla
list. I have a standard form that helps to organize this data in a way
that
will hopefully be useful to many coilers.

Fr. Tom McGahee