Tube testing

FRED HOLNAGEL w7prv at TELEPORT.COM
Thu May 17 21:57:46 EDT 2007


I have to test some ancient tubes on my 850A Hickok tester.  My chart has no really older stuff on the roll. Types are:
26, 27, ux28c, 71A , 171A.  All are 4 pin types. I need the switch settings. Any help?  Thanks, Fred W7PRV


FRED HOLNAGEL
w7prv at teleport.com
EarthLink Revolves Around You.

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