Re: NEW Self-Resonant COMPLETE SSTC Boards - BULK ORDER

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

Original poster: "Brian" <teslacoiler666-at-prodigy-dot-net> 

Hi Jim,

I feel just the opposite. I would prefer that the boards included the H
bridge, because that is what keeps blowing up all the time in this basement!
It's much easier and faster to replace devices on a PCB rather than a vector
board! I have used IC sockets to make replacing those a snap, but so far I
have not replaced a single IC yet. I am blowing MOSFETS left and right
though.

If someone offered H bridge PCBs alone without the driver I would buy some!
If you blow the output devices, Just take off the heatsink, throw the rest
in the garbage, and pop in a new PCB! A wasteful corporate lazy mindset at
its best! :-) But you are right, the prices would have to come down quite a
bit before I would do that. On the other hand I would not buy a driver
without an output stage. By the way there are as many different driver
circuits as there are output stages.

Just my 2 cents worth.

Brian


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, April 10, 2004 7:38 PM
Subject: Re: NEW Self-Resonant COMPLETE SSTC Boards - BULK ORDER


 > Original poster: "Jim Mitchell" <electrontube-at-sbcglobal-dot-net>
 >
 > Sounds good,  But why don't you try to make the board more compact?  7X10
is
 > pretty big considering my SSTC boards were 2X3...  And the H bridge being
on
 > there doesn't account for the large size,  I managed to fit an entire SSTC
 > into a
 >   5 X 6.75" base,  see here,
 > www.hot-streamer-dot-com/electrontube/temp/dsc01325.jpg and
 > www.hot-streamer-dot-com/electrontube/temp/dsc01324.jpg
 >
 > It might seem that some people would want to make their own H bridge or
 > Halfbridge that way they could build the coil to their caterings.  45$
seems
 > like a lot,  considering those large SOT-227 IGBTs will cost about 20-30$
 > each depending on where you get them...
 >
 > Good Luck.
 >
 > Regards - Jim Mitchell
 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Saturday, April 10, 2004 2:39 PM
 > Subject: NEW Self-Resonant COMPLETE SSTC Boards - BULK ORDER
 >
 >
 >  > Original poster: "Eastern Voltage Research Corporation"
 > <dhmccauley-at-easternvoltageresearch-dot-com>
 >  >
 >  > My friends and I are making a bulk order board purchase for a  ISSTC /
 > SSTC
 >  > type Self-Resonant board.
 >  > The boards will be based on standard full-bridge technology and also be
 >  > self-resonant using a circuit tested and
 >  > perfected by Steve Ward, Justin Hayes, and others . . .  The boards
will
 >  > also contain the standard TL494 based oscillator
 >  > if you wish to drive open loop.
 >  >
 >  > Full-Bridge portion of preliminary schematic
 >  > http://www.easternvoltageresearch-dot-com/sc2045_sheet1.pdf
 >  >
 >  > The boards will be approx. 10" x 7" in size, double-sided,
silkscreened,
 > and
 >  > soldermasked just as the PlasmaSonic SSTC boards were.
 >  >
 >  > FEATURES:
 >  > Uses ISOPAK 227 type FETs or IGBTs (IXFN types or HGT IGBTs etc...)
which
 >  > are
 >  > configued to mount underneath which can easily be attached to heat
sink,
 >  > block of aluminum, etc...
 >  >
 >  > Power Full-Bridge will utilize copper planes, not traces, for improved
 >  > current handling and low inductance connections.
 >  >
 >  > Self-Resonant Circuit (either base-feed or antenna)
 >  >
 >  > Pulse Modulator system (for pulsing the output)
 >  >
 >  > Onboard Gate Drive system and Low Voltage Power Supply
 >  >
 >  > I will be selling these boards at cost for about $45.00 EACH.  The
price
 > may
 >  > go lower if I get enough orders.
 >  >
 >  >
 >
 >