Thank you John Z.? Back up with power by reheating all the connections associated with the 17m/15m toroid inductors.

Hi
I just had another session with my new QMX and loving it more and more.? I've decided it is the only radio I need to take on holiday.? I'm normally torn between both QCXs, but I've made a two bander covering 40 and 20 m so I could reduce it to one.? MCHF- it feels a bit fragile and draws a lot of current, eats my battery pack in less than an hour so realistically you need to carry a spare battery and I haven't got one.? KX3- a bit heavy and I worry about the cost of anything happening to it, its advantage is it is one of the best cw radios in the world and it lasts for ages and ages on its internal batteries.? I normally end up taking my KX3 and so far I haven't lost or damaged it, but I worry.? It is a good benchmark against which to judge other radios though.??

Within the limitations of what I want a radio to do, the QMX does probably 90% of what the KX3 can do.? The extra 10% is for competition or serious dx and to be honest I don't do much of that, particularly on holiday!? Its mostly to do with receiver sensitivity, crystal roofing filters and a vast array of DSP options and electronic filtering that enables a KX3 to pull out a barely detectable signal even with a kw transmitter contesting on the same band in the next room.? I probably miss out on some of its performance anyway because I don't know what all the controls do or how to use them.

The QMX CW filtering is fine, its a good compromise, its wide and shallow enough that you can easily tune the band and hear what's there yet is narrow and steep enough to have a QSO on a reasonably busy band without being distracted by qrm.? I'd like some control over it to adjust between 100 and 1000 Hz and to offset the centre frequency to skew the shape of the filter.? I like a fairly wide filter and only close it or manipulate it when I need to.? Filtering on the QMX should be a firmware thing and it may eventually come, but I don't mind if it stays as it is now, its perfectly good enough.? ?

I was using my 12v battery pack this evening so it was putting out about 5 watts or fractionally over on 40m.? It survived a three or four second burst of auto ATU (Elecraft T1)? and I could hear signals from UK, Ireland, France, Spain.? I never had to call CQ but just answered calls, everyone I called heard me and I was getting good signal reports.? I also had an email follow up from one op commenting on how nice the QMX sounded.? All contacts made so far have been qrp/qrp and in England, Ireland and Spain.? After three back to back cw qso's over about half an hour it was warm to the touch but no more.

So I'll take my QMX on holiday, I'll leave my KX3 at home and I don't think I'll miss it.??

Brilliant radio, thanks Hans!

73/72 all?

Peter?

Bring your umbrella, boots and Skeeter stuff too.

John

KK4ITX?

?Each mistake is a learning opportunity.?

On Jul 21, 2023, at 5:30 PM, Mark WO7T <wo7t@...> wrote:

?Well Done Hans!!!!!!

72
Mark