It really is a big pivotal moment in Amateur Radio, and Hans with the QMX is leading the way.
It is important to understand that such a rig can have any amount of output power desired by choosing the RF switching outputs, the size of the modulator and power supply, and ¡°linearize in software!!!¡±
I¡¯m looking at several matched pairs of Motorola HF RF output transistors and remembering how expensive they were, and how unobtainable they are now. ?Same with Toshiba.
Yes the world has changed, for the better in several ways. ? Thanks Hans.
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On May 25, 2025, at 08:54, Hans Summers via groups.io <hans.summers@...> wrote:
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That Wikipedia article describes polar modulation as a form of quadrature modulation for digital encoding. That's not quite the same thing as what we're doing here to create SSB, as proposed by Kahn in his 1952 EER paper (Envelope Elimination and Restoration).
I chatted at length with Tony K1KP at hanvention and I understand he did invent it independently, though of course none of it is really new. And it was done too by Guido PE1NNZ in uSDX and (tr)uSDX. Commercially in broadcast applications and cellular.?
I don't think the point of any of this is that it's really new. It isn't. The point is that it's the first time polar modulation has appeared in high performance amateur radio transceivers. In particular it's been adopted by a big producer (Flex Radio). That's extremely significant because it's a large deviation from the well trodden path (Class A/B Linears) used by all the major amateur radio manufacturers to date. I was excited and impressed by Aurora and enjoyed all the chats at the Flex booth and at mine. It really felt like a big pivotal moment for amateur radio. Given the large gap in power levels, complexity and price, I don't think there's much overlap in customer base, so it was all very friendly.
73 Hans G0UPL
Ok, thanks, so Edison thought of Polar Modulation. But in a sense which is very far away from SSB implemented by pilar Modulation.
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Sverre
LA3ZA
