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Lower band QDX-M options?

 

I¡¯ve had a hankering for a monoband QDX or three. With 160 meter support in the QMX+ is there an (experimental) path forward for 160, 80, or 40 meter monoband builds perhaps by duplicating the filters in the QMX+? Happy to source the components myself.

73 KD2WQI
 

Hi Joel
QMX+'s 6m LPFs and BPF worked with no problem with QDX-M (8m was bonus)
160-80-40 should work
even try 2200, 630 :)
73 DE muhsin TA1MHS
 

Joel, I have a QDX-M here I plan to build for 160m over the winter. I had came up with values for the LPF in Elsie and another online calculator, and then Hans came out with the QMX+. People seem to be getting plenty of power out, and Hans seems to have softened the BPF sharpness a bit, I think, so good chance of many different builders winding something that works well.?
So I plan to use the QMX+ values, although I *might* use T50-2s for the LPF with less turns, just to see how that works out.?I just recently bought 25 of them from KitsandParts. Happy to send a couple your way if needed for BPF, etc.?
?
-Nate
N8BTR

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