Receiver - Hammarlund - HC-10 SSB/CW Adapter
The image below is a stock images (the HC-10 is one that was in a Schulman auction) but is pretty representative of the actual unit. I will replace these images over the coming weekend of 22-23 December 2018.The HC-10 adds significant functionality, including a product detector.....
Not often seen for sale - these were really nice units by design, incorporating triple conversion. Known for their very low generated noise. Can be used with almost any old receiver with a 455 to 500 KHz I.F.,
I doubt you will see another one for sale in Australia too often. I would keep it but I have an HQ-170A and it has the bells and whistles built-in.