¿ªÔÆÌåÓý

Hi Bob. thanks for the idea. Its called contrast <improvement> in the manual but either way it certainly effects brightness at extreme settings. I'm okay with it as is. I found a 220k in the junk box

Lynx, Have you tried returning to 1_05 to verify it is a software issue?? It could be that the Si5351 has failed.? If you return to 1_05, please post a screenshot of the oscilloscope trace. Of

Today I use firmware v1_10 do some test again. I use a?oscilloscope watching R41 and R40(CLK0 and CLK1), and found something strange.?In theory, CLK0 and CLK1 should have the same frequency but be

I use a cheap (47 EUR ) 858D clone I bought in my my local electronics shop with no problems, so far. It's really a big ?helper enabling to avoid mess on your pcb when it comes to removing

Great news! Have fun with it! Regards, YO3GFH op. Adrian

Thanks very much Adrian! Now have a fully working QMX!

I would just try flowing the solder around the encoders to see if that helps. On my qcx-mini they are fine on my qmx the right vfo encoder does at times miss the fact that I'm turning it but

I've used the ATU-10 and ATU-100 in auto tune mode with both my QMX (and some QCX mini before) with great success to tune random pieces of wire (and efhw antennas for bands they were not built for)

Good morning John, I now realized that I sent the wrong photo, in reality the C30 is installed, instead for L4 I used the yellow T37-6 because on the color scale the yellow ranges from 3 to 50 MHz

Upon installing the firmware, at first boot, the software asks what flavor of QMX it's running on. You probably answered "20-10m" by mistake. Make a long press on the left small button, the menu

Joe, cheap hot air is fine for hobbyist use. I have a Yihua 3-channel, that I bought several years ago for about $45. https://a.co/d/9ghEfTl Looks like it's gone up in price, at least for now.

Hello J?rg, Thanks for the tip. I ordered the PICKIT3. For 33€. That doesn't hurt your wallet so much, but when you consider that an ATU-100 only costs €29. Or 3,5 pieces of 20W dummy load from

I have just built my QMX, however it is deaf probably because it is using 20, 17, 15, 12, 11 and 10m but I built it for 80, 60, 40, 30 and 20m. Does anyone have a clue what is going on please?

Does anyone have an idea on which soldering rework station or hot air rework station is best? Amazon has a large amount of rework stations to pick from. I have a stack of older transceivers to repair

Following my previous post I also use a Hermes Lite 2 SDR transceiver. That unit uses two RF Power LDMOS transistors for its PA: AFT05MS003NT1, which are now obsolete but were sold by Digikey at

Hi Giuseppe, I have two questions. First, the C30 (30pF) capacitor is not installed. Did you remove it? Also, I see that at L4 instead of the T37-2 (red) toroid you used a T37-6 (yellow), I was

Hello Axel, I have also 3 ATU-100 kits and tried to read the EEPROM content with my Pickit3. Impossible, the program was read protected! Most probably yours will also be protected. Related to

I have Rev2 with firmware loaded which works, with difficulty. I have to first start my lab PS at a voltage between ~7v-10v to see the bootloader screen (no backlight and a single line of dark

I always use a NanoVNA to tune my antenna before plugging it to my Hi-Band QDX and I have soldered a diode across L14. 73 - Pierre - FK8IH

Cliff, Yes, the sweeps look much closer to what is shown in the manual. All are in an acceptable area on the display. Glad the fix was this easy. Gary a. - W0MNA