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.jarr...@ntlworld.com> wrote: > > > > On 21 October 2015 at 20:52 william degnan <billdeg...@gmail.com> wrote: > > > > > > On Wed, Oct 21, 2015 at 3:29 PM, tony duell <a...@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 >
