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

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

Original poster: "Jim Mitchell" <electrontube-at-sbcglobal-dot-net> 

Hi,

IMO the H bridge is A LOT easier to build then the driver.  It takes me an
hour max to draw the board, etch it, tin it, drill and tap the heatsink,
mount the transistors and solder them in.  It ruins the versitallity of the
board if you include everything,  plus wouldn't you like to say you at least
build SOME of the electronics?  I was going to include the H bridge in my
board design but I decided not to, that way It would allow people to use
cheap mosfets, expensive IGBTs in whatever package they like.

Regards - Jim Mitchell
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, April 11, 2004 10:51 AM
Subject: Re: NEW Self-Resonant COMPLETE SSTC Boards - BULK ORDER


 > 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.
 >  >  >
 >  >  >
 >  >
 >  >
 >
 >