Date   : Sat, 10 Feb 2007 08:42:10 +0000 (GMT)
From   : info@... (Sprow)
Subject: Master Compact speaker

In article <92AB4ACE25A633797DC3566E@...[192.168.102.25]>,
   Joel Rowbottom <joel@...> wrote:
> I've just recently taken delivery of a BBC Master Compact (hurrah!) but 
> it's missing its speaker. It's a bit bigger than a BBC B one so I don't 
> have any spares, but could one of you kind people measure the diameter of 
> one from yours please or let me know the size I need to obtain?

It's 40mm.

> Right, off to find out what chips I need for the serial upgrade now!

Both myself and Pete Turnbull give detail in the archives, and I have the
weird 74 series logic chip available in stock...
Sprow.