Just had my first QSO.? A local ham.? Received a good audio report.? I was using the QMX+ and my "Tiny Linear".? The Tiny Linear is a 100W-capable homebrew unit.? It is in a box only slightly bigger than the QMX+.? It doesn't need band codes, you change bands manually with a touch screen.
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? To make it work, I had to modify the QMX+ a bit.? There is a 220-ohm resistor in series with the output switch for the PTT.? That was too much resistance for the Tiny Linear, which actually runs its T/R relay through its PTT input.?? How much
current?? The output switch of the QMX+ is rated 170mA.??? OK, I forget how much the linear sources, so I measured it...17mA.? So I pulled the card out of the QMX+ and shorted across the 220ohm resistor.
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Seeing 60W out on peaks.? Enough to be heard.
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?????????????????????????????? - Jerry, KF6VB
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