@ac427 - a TRS-80 was my first development system at work too, when I started out as a professional Z80 programmer.
I built a Maplin 5600S analog synth in the late 70s.
mea culpa - seriously off topic.
Those Tandy cables seem solid and my sync rates are healthy on the three modems.
Blimey, Our first computer was a kit, a Sinclair Mk.14. God knows what happened to the first 13. It turns out to be an INS8514 devlopment board.
Do you still have the Synth ?
I only made it as far as building the Syntom
Did Maplin have their own elecronics magazine, i remember the Sci-Fi illustrated covers of the catalogues ?