[sdiy] followup to the vacuum tube tester schematic..

[dragon.servicing]

Hi,
after this discussion I thought I would have a look on the web and see 
if anyone else had already designed a Tube tester along the lines 
discussed. I thought these two links might be of interest.
DIY design
http://www.triodeel.com/tester.htm

commercial design
http://www.vacuumtube.com/toppage31.htm

sorry if the post is off topic, hopefully back to the Synth related 
talk. regards Peter