Chinese CODAN intruding into the 40m band

[VK3RX]

An old school buddy in Adelaide worked for EILCO (Electronics Instrument and Lighting Company). In the 1970's they went into a joint venture with AES (Associated Electronics Services) to develop and produce HF radios, and they then adopted the company name Codan Limited.

My recollection re the 'Carrier Operated Device Anti Noise' system for HF receivers termed "CODAN" (at least within DCA) is I think that system was developed by AWA.

The signalling system between radios was developed by Codan Limited.