Bad form to follow up my own post so fast but - just had a play and
there is no obvious difference between the scope match at the shack or
the aerial - except its a lot colder at the aerial :-)

However if I give the amp a capacitive load it is much happier ... and
will take over 15V and no oscillation - that ought to tell me something
but I'm not sure what :-(

Regards all

Nick
M0HGU

-- 
"Emberella," thought Magrat. "I'm fairy godmothering a girl who sounds
like something you put up in the rain."
(Witches Abroad)
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