Gang, I posted this to The Tube Collectors Association a while back, but with the exception of one thoughtful reply from Jim W., all I heard was crickets. So, please take a look, and tell me what this is: http://www.rtm.ar88.net/tubes/mystery/Mystery%20Tube.html 73, Al -- Al Klase – N3FRQ Jersey City, NJ http://www.skywaves.ar88.net/