List: time-nuts@lists.febo.com
From: Steve Rooke
Re: [time-nuts] Conducting Bench Top Material
Thu, Jan 28, 2010 1:04 PM
Remember the valves that used to have the grid at the top of the
envelope via a separate connection. That made it real easy to inject a
signal for tracing through the circuit, you just put your finger on it
and listened for mains hum at the speaker, for instance. hat was
alright till you found the valve that had an anode at the top...