Good, had me puzzled.
So where the bottom axis now reads:
-7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11
it should read:
-9 -8 -7 -6 -5 -4 -3 -2 1 2 3 4 5 6 7 8 9 10 11
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An informative graph, thanks!
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Do those SWR's all assume a purely resistive load?
The load could also be capacitive or inductive, which would also affect the peak voltage.
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Keeping the SWR below 2 is clearly a good idea on 80m and 160m.
If you have a VNA so you can see more than just the SWR, shoot for an impedance under 50 ohms.
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Tony's idea of substituting TN0110's could be good for those not planning to use the new SSB firmware.
Perhaps Hans can someday have a menu option to allow SSB mode using the TN0110's.
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Going to TN0110's adds another $4 to the parts cost, I'd guess the kits will continue going out with BS170's.
Using Q507 as a linear regulator to reduce the supply voltage to the? BS170 finals on 80m and 160m should work
or you could vary the power supply external to the rig.
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A future kit might be able to use an SMPS instead of Q507 to keep efficiency high.
But if Hans succeeds in getting SSB firmware out with the hardware as it is, that's a huge win.
And time for him to celebrate with a 6 month break in some exotic foreign land.
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Jerry, KE7ER
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On Fri, Jan 3, 2025 at 12:27 PM, Chris KB1NLW wrote:
FYI?
On my plot I should of suppressed "0" and "-1" on the x axis?
