Hi Matt - just reduce your input voltage by adding some series
diodes, rated at 2A or so.
Regards
Roger
8P6RX
On 09/04/2025 14:44, Matt - W6CSN via
groups.io wrote:
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The QMX mid-bander (60m thru 15m) is one of my primary radios
for portable QRP operations for nearly a year now. The “problem”
is that it puts out too
much power in CW mode. Here are the numbers using a
fully charged 12v battery into a 50 Ohm dummy load measured with
an external watt meter:
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60m - 6.1W
40m - 5.3W
30m - 5.1W
20m - 5.6W
17m - 4.5W
15m - 6.5W
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QMX Firmware is 1.00.026
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Question; with the amplitude modulation
capability that exists to provide SSB, can the CW mode be
enhanced with per band configurations that enable trimming the
power down to 5.0W for “by-the-book” QRP and to also lessen any
risk to the hardware resulting from power levels that exceed 5
watts.
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I can also see a use case for an easily accessible CW power
level “knob” for running QRPp without fiddling with the supply
voltage.
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72,
Matt
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