Radio experimenters often need a variable capacitor to tune their circuits, as the saying goes, for maximum smoke. In decades past these were readily available from almost any scrap radio, but the ...

Variable capacitors may be useful, but the air gap that provides their capacitance is their greatest weakness. Rather than deal with the poor dielectric properties of air, some high-end variable ...

The Range comprises five types of operation in high voltage r.f. circuits. All are tunable over an approximately linear capacitance range. High vacuum variable capacitors offer outstanding advantages ...

A total of 15 are available, three with voltage ratings of 15kV and one each of 8 and 10 kV ratings. The ranges available are 5-30, 8-50, 16-80 pF for the 15kV rated units and 5.5-206 for the 8 and 10 ...

The NCD2100 electronic programmable capacitance IC has a capacitance range of 6.6 to 37.55 pF in small 63-fF steps for shunt configuration. The digitally controlled capacitance trimming setting is ...