VT100 and/or VT105 rescued from scrap

[Paul Anderson]

The VT101,02,31, and 32 are the same, as are the VT100, 105, and 125.

The VT103 is different

Paul

On Wed, Oct 21, 2015 at 2:55 PM, Jarratt RMA <robert.jarratt at ntlworld.com>
wrote:

>
>
> > On 21 October 2015 at 20:52 william degnan <billdegnan at gmail.com> wrote:
> >
> >
> > On Wed, Oct 21, 2015 at 3:29 PM, tony duell <ard at p850ug1.demon.co.uk>
> wrote:
> >
> > > [VT100, etc, monitor PCB]
> > >
> > > > Is that true of the vt102 as well?
> > >
> > > I don't think I've ever worked on a VT102, but the same video monitor
> > > boards turn up
> > > in the VT100, VT105 and VT101 (at least). There are at least 3
> different
> > > types, at least
> > > 2 made by Ball Brothers. From what I remember the 2 Ball Brothers ones
> > > I've seen are
> > > very similar, the main difference being the video amplifier.
> > >
> > > What is different between the terminals is the PSU. The VT100 and VT105
> > > use an SMPSU
> > > that is actually quite friendly to work on (there is a separate linear
> > > supply to start it up,
> > > the pscillator and control circuits are on the output side of the
> > > isolation barrier with
> > > transformer coupling to the base of the chopper. The VT101 has a big
> mains
> > > transformer
> > > and a linear regualtor board.
> > >
> > > -tony
> > >
> >
> > VT101 and VT102 are the same, the 01 and 02 pertain to options that come
> > with the terminal. I would *assume* they have the same PSU.
> >
> > --
> > Bill
>
> I have a 101 and a 102 and can confirm that the PSUs in both of mine are
> identical.
>
> Regards
>
> rob
>