Re: G08 question

Be VERY careful here, EARLY G08s used the MJ15003/MJ15004 combination. Later ones
used 2N6259s. The driver circuits are different.

The case of a TO-3 style power transistor should always be collector. I suppose
there is something out there that violates that rule, but I've never seen or heard
of one. To carry this even further, the case of a metal transistor is always the
collector. On plastic power transistors the tab is always the collector.

Noel Johnson wrote:

> Rodger Boots wrote:
> >
> > If it's from emitter to base (would have to be) I wouldn't see any
> > disadvantages to it.
> >
>
> The two pins of a 2n6259 transistor appear to be base and collector per
> the G08 schematics, but I am not sure.
>
> Also, this leads to another question. My G08 manual shows Q705 and Q605
> as NPN transistors (MJ15003 or NTE60) and Q706 and Q606 as PNP
> transistors (MJ15004 or NTE61). I thought it was common to use 2n6259's
> (NPN) in all four locations. In fact that is what both of my monitors
> had installed. Is there a mistake in the G08 manual or a different
> monitor revision which uses the combination of PNP/NPN transistors,
> rather than 4 NPN's?
>
> Thanks!
> Noel
>
> > Noel Johnson wrote:
> >
> > > Hello all,
> > >
> > > I am attempting to restore a couple G08 monitors and have noticed what
> > > appears to be a hack on one of them. One of the X amp deflection
> > > transistors (Q706) has a 100ohm, 1/4 watt resistor soldered accross the
> > > two pins of the T0-3 transistor. Ditto for the Y amp deflection
> > > transistor at Q606. Any ideas what these resistors accomplish and
> > > whether I should leave them in place? It should be noted that the
> > > hacked monitor was working recently, but just needed a cap kit.
> > >
> > > Thanks in advance for any assistance! :-)
> > >
> > > Noel
> > > ---------------------------------------------------------------------------
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> >
> > --
> > Windows:
> >
> > 32 bit graphical interface for a
> > 16 bit patch for an
> > 8 bit operating system written for a
> > 4 bit processor by a
> > 2 bit company that can't stand
> > 1 bit of competition.
> >
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--
Windows:
32 bit graphical interface for a
16 bit patch for an
8 bit operating system written for a
4 bit processor by a
2 bit company that can't stand
1 bit of competition.
---------------------------------------------------------------------------
** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
** message body to vectorlist-request@synthcom.com. Please direct other
** questions, comments, or problems to neil@synthcom.com.