Date   : Wed, 29 Aug 2007 23:36:48 +0100
From   : julesrichardsonuk@... (Jules Richardson)
Subject: Econet oddities

Pete Turnbull wrote:
>> Or did you mean clock box? That does seem to be a little more involved from 
>> how I remember the Acorn one (the only Acorn copy I have is an original 
>> "blueprint" on A0 paper and is buried in the loft - I'm not motivated to go 
>> and find it :-)
> 
> The original Acorn clock in two-tone Vero case was a simple square wave 
> generator and divider with provision for different divisions thus 
> providing different clock speeds.  The SJ one, from which the later 
> Acorn black one is derived, also has provision to vary the mark-to-space 
> ratio of the clock, which allows for faster speeds.

Aha - I suspect my diagram's for the earlier Acorn one, which is why the SJ 
schematics appeared more complicated :-)