[Elecraft] KXBT2 Battery Connector

[Tim N9PUZ]

Could someone tell me the correct size of the coaxial power plug on the
KXBT2 battery? The KX2 manual indicates the plug is a Switchcraft #S760
(2.1mm aperture, 5.5mm diameter.) I bought some genuine Switchcraft parts
and they will plug into the sockets on the radio itself but they do not fit
into the female coaxial connector on the Elecraft supplied battery charger.

TIA,

Tim N9PUZ