Seeking an ECL monitor (preferably for a dimple-top Sun base) and Sun 3 Keyboard and Mouse

On 26 Jan 2015, at 09:20, Ian Finder <ian.finder at gmail.com> wrote: Sun type 4 and 5 keyboards work on the 3/50 using an adapter and should be a bit easier to find, pinouts (DB15->Mini-Din 8) can be found in the Sun HW reference: http://www.sunhelp.org/faq/sunref5.html Finding a working ECL monitor might in fact be the bigger problem. I have never tried to run an EIZO6500 or an Atari TT ECL monitor on my 3/50 and 3/60, but I suspect these might also work, However, they probably won't be easier to find today than an original Sun ECL monitor. There might be an option to convert the ECL monitor signal of the 3/50 back to TTL, which will be easier to adapt to a modern monitor. Looking at the schematics of the Sun 2 video board at bitsavers, page 18 of 19 (http://bitsavers.informatik.uni-stuttgart.de/pdf/sun/sun2/800-1187-01_2-120…), a TTL-compatible video output (for very early Sun 2 monochrome TTL monitors) is supported in addition to ECL, selectable by a jumper (right hand side of the sheet). The conversion from ECL back to TTL is done by a 10H125 Quad MECL-to-TTL translator chip (U1809, top right corner of the sheet): http://www.onsemi.com/pub_link/Collateral/MC10H125-D.PDF I checked if this would also be possible on the 3/50 some months ago and - if my memory doesn't fail me - my 3/50 board actually had empty solder pads for a 10H125. The board is currently about 900 km away resolution photo of the board. However, I think it might be worthwhile to investigate if the 3/50 can be adapted to use TTL monitors in a similar way to the Sun 2 video board. Strangely, the Sun 2/50 schematics on bitsavers don't seem to include the option for a 10H125. The chip is still available from OnSemi, I ordered a couple, but didn't get to try them so far. Hope that helps, Michael