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Hello all,

Today I finished my QMX+ and after some initial configuration / diagnostics I measured the output power by triggering in TX in the diagnostic screen.?
The power outputs where (for 9V):

160m - 5.75 W
80m - 5.00 W
60m - 4.47 ?W
40m - 4.47 W
30m - 4.57 W
20m - 3.09 W
17m - 2.57 W
15m - 2.88 W
12m - 2.14 W
11m - 3.24 W
10m - 2.95 W
6m - 2.09 W

As expected there is a roll off at the higher bands and as observed before by other builders a dip on the 17m band (compared to 20 and 15m).

The diagnostics showed nice curves on the LPF and audio filters. But the RF filters look a bit funky (not like the manual, so there is some work to be done there.?
But as this is for the RX part, I fired up WSjtX, monitored the 40 and 20m band for a while and? made a few FT8 QSO's on those bands for testing.?

Next steps will be taking a closer look at the RF filters, do some more RX with it, take a better look at all the configuration options (big thumbs up for the terminal interface for easy configuration).??

The build, which took me a few weeks instead of a few evenings to complete due to personal reasons,? I documented in a kind of blog style on my website: (still needs some text to be added and edited). Growing into be a grumpy old man,? I don't mind SMD, but? find it sad that there are less through hole components to be installed compared to the QCX+ ;-) ??

Hans, again you showed me that you make great hamradio kits which are a fun to build. I tip my hat for you.?
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73 Lex PH2LB?

Thanks Hans, for adding the links :-)

Small update on my QMX+.

Like all the cases from QRP-Labs, I really love the QCX+ / QMX+ case. But when you the have QCX+ or QMX+ case it on a desk, the ergonomics aren't that good. Just try to turn the tuning dial and you feel what I mean.?

But luckily I already solved this problem with my and with my experience on the I desiged to re-design the original QCX+ tilling feet so, the they could be used with strong double sided tape.

I used this tape from or if the link is broken, google for "hxres tape".

?

I have very good experience with this tape, it's strong like hell, but this is the first time I tried it for the tilt feed on a case of this size (used it also for the QMX-mini but that case is smaller). So success is defiantly not guaranteed.



The height of the 3D printed tilt-feed is the same as the rubber feet supplied with the QMX+ case. So no wobbling whats so ever.?

??

Now the ergonomics is much better when using the QMX+ on the desk. For now I leave it stand on the work bench for a day and if tomorrow morning the case is still in this position, the tape is approved for this job :-)

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73 Lex PH2LB?

And 24 hours later, it's still standing. So this tape can handle it and is approved for this usage :-)

The 3D design of this tilt feet can be accessed through (just click on the 3D picture).

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73 Lex PH2LB?