I remember reading a constructional article, might have been 5 or 10 years ago, in an electronics magazine. From memory it used a single vacuum tube with a top cap grid connection, to maintain the lowest possibe leakage between the tube and the external field probe.
I've looked through all my back issues I have here with no luck. Anyone remember this or a similar article and could point me in the right direction. I want to build one !!
regards..
I've looked through all my back issues I have here with no luck. Anyone remember this or a similar article and could point me in the right direction. I want to build one !!
regards..