Link to this sstv converter
https://www.wraase.de/sc1.html
Moderators: Dave Moll, Andrew Davie, Steve Anderson
Steve Anderson wrote:Good find Harry. Interesting to note somewhere in the attachments a figure of 'just' $1295 is mentioned. Assuming this was 1975 (about right for such a device), today that would be US$8,525.00. I wonder how many were sold?
Steve A.
Harry Dalek wrote:Parts wise those would be rare these days but updated circuits would bring all that down !
Steve Anderson wrote:It's probably all discrete TTL logic plus some antique analogue, (no micros, therefore no software). The memory maybe dynamic, but usually a reasonably easy conversion (and simplification?) to static. It could be possible to update the design yet keep all those switches, knobs and flashing lights! Who doesn'l like flashing lights?
Steve A.
Harry Dalek wrote:..I was thinking all those parts are pretty rare these days..
Steve Anderson wrote:Harry Dalek wrote:..I was thinking all those parts are pretty rare these days..
In many cases not so, basic TTL chips can still be bought or substituted with a similar and probably faster parts, though that wouldn't make much difference here. 7400->7LS400->74HCT00->74HC00...and so on... Analogue parts (op-amps, comparitors, etc.) likewise....unless you really want to replicate the original...I don't see any point in that myself. Take the principal, maybe, and bring it up to date.
Why use an EF80/6BX6 in a CRT deflection amplifier when a silicon MPSA42 (or the like) can do the same job?...without a heater supply...admittedly the tube/valve may have a wider bandwidth, but is it needed for NBTV/SSTV? Probably not. But those glowing heaters do have a certain charm of their own...Back To The Future - 1956 Here I come!
Steve A.
Users browsing this forum: No registered users and 14 guests