1j42b Valves

[ppppenguin]

Also OT, but picking up Brian Cuff's post. I too knew Brian Pethers when he and I were colleagues at Michael Cox Electronics. Very clever engineer with tremendous insight, almost entirely self taught. Probably should have been in academia. Later I used to meet him at Harpenden where we would have long and very technical chats. I didn't know the tragic circumstances of his death.