Wanted : Monitor Capable of TTL RGB

[Tony Duell]

> 
> ard at p850ug1.demon.co.uk (Tony Duell) writes:
> 
> > Is CM8833 a TTL-input monitor?
> 
> It depends -- there were lots of variants of the 8833 with different
> input options. I've owned three: a Philips-branded one that has analogue
> RGB on a DE9, a Commodore 1084S which has separate DINs for analogue and
> TTL RGB, and the Acorn equivalent which has a SCART connector.

That's what I thought. I beleive there was also a version with a built-in 
PAL decoder (composite colour video input), 

As an aside, therw was a PAL-input (internal decoder) version of the 
Microvitec Cub too. 

> 
> The 1084S at least is perfectly happy to accept TTL RGB on its analogue
> RGB input, as you suggest; I use mine that way with my BBC Micros

Indeed. I normally put a 300 ohm resisotr in series with each TTL signal, 
given the 75 ohm terminatiuons,that brings 5V signalsdown to 1V.

> (having made up the cable when I didn't have the right DIN plug for the
> TTL input!). They're really nice monitors, aside from the tendency of

Not for this model of monitor, but once when I didn't have the right plug 
to hand, I pulled the case and temporarily soldered the wires straight to 
th PCB.

> the flap covering the controls to fall off and get lost. The 1084S
> seemed quite expensive in 1990, but given that it's still in regular use
> 20 years later, I'm not going to complain. ;-)

Actuially I think mine has a vertical deflection fault at the moment 
(I've not used it for soem time). I have the schematics, it can't be hard 
to sort out. 

> 
> What I'd really like is a nice big old broadcast-quality RGB monitor to
> use with classic computers and laserdisc/video, but I'm not too hopeful
> about one coming up locally (Dundee), and I wouldn't want to ship one...

You're not gettign mine :-). I have an old (delta gun CRT...) Barco 
complete with the 'user manual'. That manual has one page telling you how 
to use the brightness and gain (contrast) controls, a couple of pages 
explaining how to mount it in a rack, and lots of pages of scheamatics, 
alightment data, waveforms, etc. Amd yes the manual does make reference 
to 'studio use'. 

Analogue RGB inputs on BNC sockets, of course.

-tony