Yep, an excellent condition Model III (the followup to the Model 1) with 16K of memory and the
ubiquitous Z80 processor, which came from the US with the missus a couple of
years ago along with a printer, tape recorder and dust covers. Pity some heavy-handed
baggage handler decided to play football with it at the airport, so when it
was unpacked here it was obvious the screen had been smashed so I fixed the
mountings (as you can see in the pic) and it was put on a shelf until I could
get another screen.
Recenty I discovered that the screens were the same as old B&W
tellies, and I just happened to have one.....
Screen transplanted successfully; power up and I get raster lines.
Dammit. Just as I switch off the magic smoke escaped - I'd totally forgotten
the machine was from the US so the PSU was set to 115 Volts and I'd just fed
it 240. Oops. Fortunately I could 'borrow' one of the PSUs from my 48K Model
III and do some checks and component swaps; after days of desoldering and checking
every single component that was testable (99% of the bloody thing) I discovered
that I'd killed the main voltage regulator, mains smoothing capacitors (where
the smoke escaped from) and nothing else, which isn't bad when you consider
that in 115V mode the incoming voltage is fed through a voltage doubler, so
pretty much every component up to the regulator had had twice it's expected
After all that I fully expected the machine to be dead, but it's
perfectly happy......thanks again to Tony Duell for help on troubleshooting
the PSU :o)