On Apr 1, 22:26, Tony Duell wrote:
> The Spectrum uses a 'power connector', probably 2.5mm (but I've not
> measured it). The central pin of the part on the PCB is -ve, and the
> outer of the plug (cable mounted part) is therefore +ve.
>
> The ZX81 uses a 3.5mm jack socket (what you call a 'phone socket' across
> the Pond) for the power input. The tip is +ve and the sleeve is -ve.
Oops, looks like I was too hasty and grabbed the wrong PSU. I'm sure Tony
is right, now that I think about it. The ZX81 certainly uses a 3.5mm jack.
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
Received on Sat Apr 01 2000 - 16:06:07 BST