Alternator 480 hz air core transformer

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Harvey Norris <harvich@xxxxxxxxx>

I was making a reply to Mr Herrick concerning the
internal primary thread questioning; and somehow the
wrong key was touched and the reply was sent without
finishing. I made an air core transformer using a 11
mh primary coil which was a spool of 500 ft of 14
gauge wire, commonly sold from wire suppliers. The
secondary was a 80 lb spool of 23 gauge wire
containing some 20,000 winds of some 9 miles of wire.
This was NOT a high frequency transformer, it was
simply a source frequency air core transformer driven
with 480 hz from a AC converted car alternator. In
this case the primary spool easily fit inside the
conical top opening of the 20,000 turn secondary. Each
primary and secondary L value then could be given
discreet separate C values, to make a tunable pair of
LC combinations and furthermore the air core
transformer resembled the actions of a high frequency
tesla air core coil in many respects. This was
actually a pair of L and C values, and the C value
that needed to be used for the primary could be easily
tuned, but the C value needed for the secondary was
barely effected with tuning, simply because the
variance of each primary and secondary L value was
exceedingly large; thus the secondaries C value used
for tuning could remain close to the same value,
irrespective of the mutual inductance considerations.
In this circumstance with the primary inside the top
volume of the secondary; the amp turns of the
secondary clearly exceeded the amp turns of the
primary. If I remember right Malcolm Watts made a
comment that with a high frequency tesla coil, the amp
turns of the secondary dont always exceed those on the
primary, and this aspect qualified as a misunderstood
aspect. He said that if the primary appeared
relatively in space as internal to the secondary, then
the amp turns of the secondary could exceed the amp
turns of the primary. In my case this was easily
proven since no high frequency was involved and then
the amp turns of the secondary could be shown to be
greater then the amp turns of the primary.

This was only one aspect for comparisons. If the
primary in this case was separated from the secondary;
so as to enable a looser coupling between them; the
primaries Q factor would go up quite significantly,
thus a most unusual demonstration could be made where
because of tuned circuits, the secondary could record
more voltage output as the primary was removed in
space from the secondary. Using a 20 inch neon bulb
connected to the secondary LC midpoint voltage rise,
the primary could be placed inside the secondary top
conical opening and the secondaries neon would not
light, beacause the primary could be tuned that way by
choice of C value. The voltage input to the air core
transformer was only around 15 volts from the AC
alternator, and it requires about 550 volts to light
the neon tube from the secondary. The primary could be
gradually raised away from the secondary and then the
tube would light. It functioned more efficiently with
loose coupling rather than tight coupling, another
characteristic of tesla high frequency transformers,
but again this was NOT a high frequency transformer,
only a source frequency transformer, that with the
usage of 480 hz made the LC combinations a
practicality, but at 60 hz the combinations would not
be easily made possible at all. In this specific case
the primary could be tuned to act with the secondary
so that as the distance between them increased, its
effective reactance used for the tuning became matched
with the C Value employed so that when the proper
distance between the secondary and the primary was
obtained, then the  secondaries neon would light. It
then became a tuned circuit negotiated by the
reactance change it experienced with the proximity of
the L and C values made with secondary.

Sincerly HDN