This was my finding also.? I started with a qcx, then a qcx mini. Then a qdx followed by another qcx mini and finally the qmx with another on the way.?
I had two issues that were nothing to do with either the build or the performance of the units.? Firstly I blew the finals on the qdx by transmitting into an antenna that wasn't actually connected to the radio....? and secondly the power output on one band on the qdx was a little low. A bit of advice from some on here and a little fiddling with one toroid winding and it's all into place and working fine. I've used all my qrp-labs kits out portable and made many hundreds of contacts on them.? The build manuals and thought that has gone into these kits is beyond anything I have experienced from anywhere else.?
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I think the qmx is definitely not a beginner kit. Although you are dealing with all through hole components,? everything is very cramped and the six layer board needs some decent experience with a soldering iron. That said the manual is so detailed,? I'm sure with patients and decent workshop rabbits anyone with a steady enough hand and a strong magnifying glass could make this kit work.?
