Decade Capacitance Box, 10-100 pF, 63V Subcategory_Pipette Bulbs this 20mm-diameter steel helix carries

this 20mm-diameter steel helix carries longitudinal

two movable bridges

Selected through four rotary-switch decades from 0 to 11

Transparent-cased 2V 20Ah lead-acid accumulator with removable handle and printed terminal markings

Four-diode bridge rectifier rated 5A at 100V with 4mm input connections and the circuit diagram printed on the case

Decade Capacitance Box, 10-100 pF, 63V Subcategory_Pipette Bulbs this 20mm-diameter steel helix carriesDecade capacitance box stepping from 10pF to 100pF in 10pF increments at plus or minus 5% on a 63V rating, supplying the picofarad end of the cap reference series for RF tuning experiments.