Yahoo Group -- Icom IC-21Ahttp://groups.yahoo.com/group/IcomIC-21Agroup/?tab=s
The RigPix manual for the Icom IC-21 shows a male 8-pin Amphenol/WPI Octal plug.
The manual also shows AC and DC wiring from that plug (common for 1960s designs).
Schematic, on last page, shows octal wiring (bottom margin, right middle) for DC and AC operation. Time to build cables.http://www.rigpix.com/icom/ic21_manual.pdf
Icom Global Support (Japan) has the Icom IC-21A manualSame as the IC-21 manualhttp://www.icom.co.jp/world/support/download/manual/pdf/IC-21A.pdf