Self powered
A tachometer using solid state and/or vacuum tube circuitry.
NSN 6110-01-575-3442
NSN 6685-00-671-9329
NSN 6610-01-384-1587
NSN 5960-01-358-9733
NSN 5930-01-017-0196
NSN 5945-01-227-3056
NSN 6650-01-259-5940
NSN 5910-00-305-9353
NSN 5998-01-245-9231
NSN 6135-00-112-8637
NSN 5999-01-560-9336
NSN 5945-01-337-0816