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Hi Zhenxing Potentially, yes, depending how it's implemented 73 Hans G0UPL http://qrp-labs.com https://buymeacoffee.com/g0upl [email protected]> wrote:

Hi Hans, isn't it [-36kHz, +12kHz] of VFO? 73 Zhenxing N6HAN

I'm sure this isn't new, but just to talk about my experience. My QMX has been working - Tx and Rx, but I hadn't used it for some time apart from some listening and testing of a mini antenna tuner.

Here's a way of knowing of any semiconductor device is being stressed (regardles of SWR blah blah). And it' the temperature of the device when operating into the load in question. Typically any

Hello Hans, I installed the latest version and everything was ok. I did a factory reset and everything is ok except the connection with Putty which no longer works. Although the Putty connection

Something doesn't seem right with that. I'm running 9Volts into a QMX built for 12V. Output was measured "north of 5Watts" at 12V. When running 9Volts in, I get a measured 3.75-4Watts out. How are

True. I am using the 50W PA at +20V. But QMX at 10 - 11V on 20m and 17m. -- 73 Bojan S53DZ

Hi all, I have noticed on my Rev. 4 QMX that even with the backlight turned OFF in the display settings, the backlight LED is illuminated a bit. I'm running the latest firmware as of today (1_00_23)

RS - agreed - 10 Hz should be plenty fine for most of us CW ops. After reading other posts on this subject I realized there IS a way to have 10 or 1 Hz RIT tuning, by holding in the TUNE button while

Yes, I also found flux on the solder wick makes it work much better. I always use a liquid flux that I found works quite well. Dean - KC9REN

- to be clearer That PA will have better performance and slightly higher gain at a higher supply voltage The QMX will work best at its intended voltage While overdriving the PA should be avoided my

Hi Steve, I would say 2.0:1 max at +12V DC, 2.5:1 max at +11V and 3.0:1 max at +10V. This is my suggestion. I stick to these rules set by myself and so far no harm to my QMX+ PA. But I must say I am

These are great, thanks for the info!

"Too much power going into the amplifier" wasn't the question. The question was, "What is maximum safe VSWR for TX in digital modes?" I'm not worried about overdriving the PA; I'm concerned about

I'm using a similar device on my qmx and also a laptop kickstand. Both I got cheaply from amazon. The slimmer one for the phone is the one a prefer..

I still love my 20m QCX too, it's an original QCX Classic (Rev 4 PCB) built into an enclosure along with the original prototype 50W PA kit http://qrp-labs.com/50wpa . I have had many happy QSOs with

Hi all We took delivery yesterday of a large shipment of assembled PCBs including 500 ProgRock2 modules http://qrp-labs.com/progrock2 and the overheating problem of the previous batch is now

So, an evolutionary dead end? That's a shame, as it is a fun CW rig to operate. I must say I am using my QMX almost exclusively ATM. It is indeed a marvel... tnx Hans! de Russ, va3rr

Hello Simon YES! I specifically chose to design QMX with independent L & R output through the DAC all the way to the earphones via separate L & R audio-amps (just op-amps); this provides capable

The CW filters are great. Wondering if binaural mode is on the list at some point.? Appreciate it it's not because its a bit of a novelty. 73 Simon VK3ELH