I skimmed Hans' paper on the topic (what a great read!):
https://qrp-labs.com/images/qmx/fdim/G0UPL.pdf
It looks doable on the software side -- the T41 has plenty of processing power and the methods look tractable. I worry about two things on the hardware side:
1) Can we run the si5351 I2C at 1 MHz?
2) How hard will it be to change the voltage of the amplifier to perform amplitude modulation?
The design needed to support the self-calibration routines needs some thinking about too.
-------- Original Message --------
On 5/25/25 10:04 AM, John G0SDF via groups.io wrote:
After learning that Hans Summers was at Dayton Hamvention promoting his QMX which can now operate SSB using Polar Modulation, this got me thinking.
Has anyone considered a T41 using Polar Modulation?
How difficult would the software be to implement? I am sure I can sort the hardware side of things.
?
John, G0SDF
