Ok, thanks Ken & Ian & others. My post has spawned just the type of
comments that I had hoped for.

Ian, I've been over to Tom's tubes and I see you have boards over
there. If I do the tetrode I will probably pick up a kit to help out.
I don't like to re-invent unless there is a clear-cut advantage to
doing another way.

Ah, I didn't realise you were a neighbor of Tom's. (As I hope you
understand, I was writing with the 'In Practice' hat on, and definitely
wasn't trying to sell you anything.)

I'm up in the air over 2 stages or the Tetrode. I
think the tetrode is probably going to win. I've posed the question to
some AM types on AM Fone to see what they say.


--
73 from Ian GM3SEK 'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek