FS: excellent calibrated Hickok 6000a tube tester, good Hickok 539c alternative at much lower price
cmdr buzz corey wrote:
You can monitor the filament voltage with a voltmeter with the tube
under test and reset the line voltage.
Requiring a test-socket and a VOM. Many Hickoks had this function built
in, hence Mike's note.
Peter Wieck
Wyncote, PA
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