Thanks to all who offered their valuable opinions and work-arounds.
In the end I decided to build the circuit found here.
http://www.qsl.net/icom/ampcontrol.html
which was within a reference kindly provided by Dick K7VC.
Basically this was a no brainer to construct, worked first time ( a first
for me!), and cost just a couple of quid in components, 1xTIP32,
1x1N4002,1x1K0 1/2 watt, and a little ABS box, all from Maplin.
Once again this reflector proves to be the place for gen. info. Thanks you
blokes!
73
Clive
GW3NJW
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