On Fri,7/29/2016 10:31 AM, Ron D'Eau Claire wrote:
Are those capable of linear operation for SSB as the poster asked? The ones
I had back then were non-linear (class C) strictly for FM/CW only.
CW is 100% modulation of a carrier by a rectangular wave, so the
harmonics associated with rise and fall times create at least as much
distortion as SSB. That distortion shows up in the form of clicky
sidebands. It's quite easy to see these sidebands on a P3. Here's some
work I did a year or two ago measuring some rigs that were available to me.
http://k9yc.com/P3_Spectrum_Measurements.pdf
The second file contains much of the same data, but focuses on
improvements made by firmware upgrades to the FTDX5000 a year or two ago.
http://k9yc.com/FTDX5000_Report.pdf
73, Jim K9YC
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