The CKTB1000/3.5/79(II)  vacuum capacitor Cross reference
comet old type:CV05C-1000KW/5
comet new type:CVVI-1000AC/5-KED-M
CKTB1000/3.5/79(II) use vacuum as dielectric with ceramic envelope ,which have the following features:High voltage , Small size , High Q value, Stabilization capability , High reliability ,Low price. 
Variable ceramic vacuum capacitors are widely used in influence heating ,medium heating ,the equipments for communication transmitters and broadcasting etc.