[Amps] Capacitor

[Zgieb]

Hello to All,

Another question to refer unknown capacitor.has anybody any information
on KAPSCH high voltage capacitor.
Usually referred to as "pipe"  style, fiberglass or bakelite material cover.
Both side metallic cap with axial screw M8.
Marked: KAPSCH  Ko.2976
However is marked 1000 pf, Betr. Spg. 20 kV=
Brown tubular, approx. 40 mm diameter and 136 mm long.
Suitable for rf coupling/decoupling ?. What type capacitor, vacuum, ceramic, other one ?.
Probably was using for medium wave airport transmitter the British made. 

Thanks for help
Andy SP6AEG