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I would imagine a 30, 20, 17, 15, 12 and 10 metre QMX would be reasonably straightforward to implement, at least from a LPF filter perspective. 72 de va3rr

Unfortunately, I learned a new one the hard way recently... Went to plug in the BNC to a dummy load on a newly finished QDX, and found that the BNC was defective...there was a fair amount of plastic

Hi Muhsin Yes yes I got all that, but still I prefer just to not take risks and solder to the pads. 73 Hans G0UPL http://qrp-labs.com https://buymeacoffee.com/g0upl >

Hans Hi Steel needles are not for punching through the solder filled holes It is for; you heat the pad, then insert the steel needle through the melted solder gently, solder won't stick to the needle,

I find my ATU 10 tunes up perfectly well with the QMX set to 'Tune Mode'. I use 12.03v supplied by a Nitecore PD powerbank. 73 de OE6FEG Matt

Thanks for the kind words.? It was fun to fiddle. And I believe does usefully reduce the internal thermal loading.? I'm also working on a mod for a QDX where the same fan is mounted internally,.

QSL, Mike and thanks ! I just finished working 10m thru Top Band using the QMX-Plus. The Magic Band wasn't open here today :0( Nite all ! 72, Bill, N4QA/4 in OKI Attached is m y old Elementary

Hi Bill, That is a fantastic picture of you and your dad. It’s a real treasure. He had to be proud of you following him into ham radio. The six-shooter and truck are fun. Those have to be fond

Thank you SO much for all your help, i really appreciate. I can measure current on the 12V input.? I have a digital oscilloscope also. Anyone else wants to pitch in ? Thanks, Sly VA2YZX

Well, I guess it is good that D109 is really working.? That removes one more variable I wouldn't jump to the conclusion that it's one of the major ICs yet (because I'm stubborn: it could be one of

Here is the video of my popping QMX. https://youtu.be/vaeNRub9hew 72 Myron WV?H

I think that is a super mod! You prolly gave Hans an idea! -- 73 Karl KI4ZUQ

Thanks for the feedback. I've got 10 MS5351Ms on their way from China.? Not holding my breath. I had a? bit of a fright using the protocol analyser on my scope, Was setting up I2C analysis and

Hans knows the issue and the fix.? It is on his list and not forgotten. He removed most of the pulse shaping on the sidetone while addressing a different issue, which resulted in the 'click' part of

Hi Myron, Further up this thread, Hans has indicated he’s aware of the issue and it is on his list. It has affected me too since the beginning of my QMX revision 1. ?The issue has been raised in

Hello Steve Yes I agree it is optimized for 15m, but not intentionally, as you see both of the QMX+'s show 15m the best. I tried to optimize all three bands in that LPF set, but it wasn't easy. I am

Here's some pics of a cooling mod I did on my HB QMX.? It involved spacing the bottom cover away from the main PCB with small nylon standoff which opens up the sides for airflow. I figured its ugly

Steve, The turns ratio of T501 from primary to secondary is higher if you build the radio for 9v instead of the more typical 12v. That higher ratio means a 9v build running on 9v has about the same

Exceed the limits of the BS170s and they expire more readily.? Higher voltage is more power also when there is SWR issue higher current. For 9 or 12V the transformer ratio is used to limit power at

I have had those leading-edge audio thumps since the beginning of my QMX (v27 FW) as well and wondered if it was going to be fixed but it doesn't even look as though its on the list to get fixed. To