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"accurate" "tubetester" Specification spec data sheet
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Accurate Instrument Co. Inc. New York
Tube Tester 257
Service or Lab Equipment
110 Volt AC
350 x 90 x 230 mm / 13.8 x 3.5 x 9.1 inch
1 kg / 2 lb 3.2 oz
The Accurate 257 Tube Tester was advertised as a "new improved model 257" in 1969 and 1970.
Tests Novars, Nuvistors, 10 pins, Magnovals, Compactrons, Decals. Individual section testing for shorts,
leakage and emission. Leakage sensitivity up to 5 Megohms. 4.5" dual scale meter with dampening chamber.