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Connecting Microwave Trannies in Series - how?
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From: Nasalharp-at-aol-dot-com [SMTP:Nasalharp-at-aol-dot-com]
Sent: Tuesday, February 17, 1998 4:32 PM
To: tesla-at-pupman-dot-com
Subject: Re: Connecting Microwave Trannies in Series - how?
Greetings,
2 in series - centre point connected to ground works fine
if every thing is in phase.
4 in series apparently works fine to if the outer transformers are under oil.
2100v is not enough for a coil - the gap would be very narrow with huge
quenching
problems. 4000v maybe. Have you considered putting your beefy xformer on
one side and a matched pair in // on the other?
I've had good results using a 5500v 350mA xformer, on the primary side I use
two microwaves as inductors for current limiting (secondaries shorted out,
primaries connected in series together with a variac used as a variable
inductor.)
Resonance rise in the inductors gives a much increased output voltage.
4 or 5 narrow gaps work much better than one large gap.
Have fun,
Alan Sharp UK
In a message dated 17/02/98 06:39:33 GMT, you write:
<< <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Hi, I'm wanting to make a beefy HV power supply for Tesla use. I have a
number of 1000W (VA?) trannies and a very large 1800va trannie (I can
pull a spark out from this to about 6 inches!) The mains here in New
Zealand is 230V 50hz and I was wondering if there is a special way to
hook these in series to get a higher voltage. I have heard of people
running 2 in series and others say you cant series more but others i
have heard have used as many as 6 in series. Obviously the insulation
on these is not made for that kind of voltage but If I inserted them
under USP oil in an acrylic box would that protect them?
Of course i know that I cant really mix and match the trannies as the
higher amperage ones would be limited by the maximum amperage of the
smaller ones.
Also I was wondering whether or not one can make a good performing tesla
coil from only the 2100v-at-850mA transformer. Does one really need the
high voltage? Of course aperage would mean I would need a rather large
capacitor but I wouldnt need such thick poly with the low voltage.
Would secondary windings need to be different from the norm?
>>