> 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
