RE: WG6100 - Mystery transistors

The schematic identifies them as

        MPSU57 Q603, Q703
        MPSU07 Q604, Q704

And the "Woodcock Faq" (xy monitor bible) states

"A common modern day replacement for MPSU57 (Q603/Q703)

is NTE189 and the part for MPSU07 (Q604/Q704) is NTE188. These should

be greased where they touch the heat sink (like the chassis transistors)

to improve heat dissipation. If you are having trouble with these

failing, you might want to beef them up by using TO-202 package upgrades

to NTE50 (MPSU57) and NTE49 (MPSU07)."

Would that be what you are looking for?

Mike

> -----Original Message-----
> From: W. Dennis Shirk [SMTP:dshirk@godfrey.com]
> Sent: Monday, March 22, 1999 6:35 PM
> To: vectorlist@mcfeeley.cc.utexas.edu
> Subject: WG6100 - Mystery transistors
>
> There are 4 transistors on the deflection board (2 PNP, 2 NPN) from the X
> and Y sections that have each have a large metal heatsink attached to
> them.
> Unfortunately, the manual does not identify what kind of transistors these
> are.
>
> Any help?
>
> Dennis
> http://gameroom.godfrey.com
>
>
> ---Original Message-----
> From: Joshua Bergum <jbergum@bellsouth.net>
> To: vectorlist@mcfeeley.cc.utexas.edu <vectorlist@mcfeeley.cc.utexas.edu>
> Date: Monday, March 22, 1999 9:51 AM
> Subject: Re: Space Duel vector chip
>
>
> >
> >
> >Clay Cowgill wrote:
> >
> >> I have a replacement circuit built up, but haven't produced boards yet.
> >> I've been trying to size and cost reduce the board, but the final
> >> version isn't quite done yet. Maybe I'll crank through it this next
> >> week or so.
> >>
> >> -Clay
> >>
> >> > ----------
> >> > From: Joshua Bergum[SMTP:jbergum@bellsouth.net]
> >> > Reply To: vectorlist@mcfeeley.cc.utexas.edu
> >> > Sent: Tuesday, September 22, 1998 12:06 PM
> >> > To: vectorlist@mcfeeley.cc.utexas.edu
> >> > Subject: Space Duel vector chip
> >> >
> >> > I have a bad vector chip on my mainboard
> >> > Has anyone found a replacement or built a homemade replacement for
> >> > this
> >> > chip.
> >> >
> >> >
> >
> > Would it be possible to just buy the plans from you and build the chip
> >myself?
> >The size of the chip really is not important to me.
> >
> >Joshua Bergum
> >jbergum@bellsouth.net
Received on Mon Mar 22 14:45:44 1999