COMPOSITE VIDEO COLOUR MODIFICATIONS
=====================================
Applicable Hardware: BBC B, BBC B+, BBC Master 128
Support Group, Acorn Computers Limited, Acorn House, Vision Park, Histon,
Cambridge CB4 4AE.
Related Application Notes:

Copyright (C)Acorn Computers Limited 1992. Every effort has been made to
ensure that the information in this leaflet is true and correct at the time
of printing. However, the products described in this leaflet are subject to
continuous development and improvements and Acorn Computers Limited reserves
the right to change its specifications at any time. Acorn Computers Limited
cannot accept liability for any loss or damage arising from the use of any
information or particulars in this leaflet. ACORN, ECONET and ARCHIMEDES are
trademarks of Acorn Computers Limited.

Composite Video Colour Modifications 16th June 1992
Support Group Application Note Number: 001, Issue 1
Issue: 1
Author: 

Modifications for the Master 128
--------------------------------
On Master 128 issue 1 boards a 470 PicoFarad capacitor should be connected
between the east leg of R137 and the east leg of R153 which are located
directly to the east of the modulator.  Connections should be made on the
component side of the PCB with the leads of  the 470 PicoFarad capacitor
being soldered directly to the leads of the two resistors. On Master 128
issue 2 boards link LK11 should be made.

Modifications for the BBC Model B and B+
----------------------------------------
On Issue 1, 2 & 3 boards a 470 PicoFarad capacitor should be fitted between
the emitter of Q9 (identifiedby an "e" next to one leg) and the central leg.
On Issue 4 and later, the capacitor is on board and can be connected simply
by fitting link 39 which may be found next to the modulator in the far right
hand corner of the PCB. On the BBC Model B+ link S26 should be made.