Three days ago I completed the build on my QMX+ and I'm happy to report it is working fairly nicely. My only disappointment is the low power output on 20(2.9w), 17(2.8w), and 15(3.3w). Those measurements were made in the terminal application, AFTER having tweaked all the low pass filter toroids. Well, actually 10 meters isn't much to write home about either, providing about 1.9w out. But my primary focus here is on the 20, 17, and 15 meter bands. I've spread the turns on L515 and L516 as much as possible. That gave me a bit of improvement from where it started but being right at 3 watts or less isn't what I was aiming for. So, I'm leaning towards removal of one or two turns.
?But, I've got questions. Are those inductors connected in series, where the inductance adds? Do I remove a turn from each toroid, or two turns from one of them? ?Which one - does it matter?
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Jim / K7TXA
Eagle, ID
SKCC 10447T
BUG 301
