[GreenKeys] Western Union Rectifier 69-B

[Bill Lewis]

 > Not sure where the "base down" comes from. The 83 in the
 > TV-7D/U tube tester is horizontal.
 > However the operation of a tube tester is not continuous.
 >
 > ??
 > Don
 > K9TTY

Base down is because when the tube is cold the mercury
condenses to liquid droplets.  You don't want it laying in/on
the electrodes.

If it happens to be in the wrong place when you fire up the
tube, it'll short out and blow up.

Bill
K3WRL