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“ Various semiconductor data sheets explain the leads are the primary heat sink” I’m not familiar with that manufacturer or part number ?? We are talking about a specific manufacturer

It's not my QMX. I don't know why the 1_00_017 is not on there. Windows 11 and the latest Kubuntu. But that shouldn't matter. 73, Holger DL9HDA

My QMX 12V works very fine and for hours in the field with the 9V/12V bank from TalentCell. 73, Matthias DL5MAY Matze

Mike, " All 3 legs of Q507 measure 11.5 Volts RMS in both transmit and receive states" . You probably mean 11.5V DC, but whatever... That is a problem! You need to find the reason and correct it

I am selling my QCX-mini 5 watt transceiver built for 20 meters. It was built for 12 volts. It is in its nice QrpLabs enclosure and works just fine. I am a non smoker. I will ship this via USPS to

I thought I'd post a description of my attempt at operating the QMX from a cruise ship in case anyone is interested. The XYL planned a cruise for spring break and I couldn't resist stuffing the QMX

About 2 weeks ago I finished building a high band Rev 3 QMX.? I was able to flash the firmware and almost everything worked: - I connected to WSJT-X and used the CAT functionality to change

Never had an RFI problem with even the cheap eBay buck converters. You could also use a 7809 regulator on a small heat sink. That's what I do at home from my 13.8VDC PS.

I haven't done this yet myself, but will be soon for a QDX. I'm looking at either a battery back that has a PD USB-C output, and then use a cable set up for 9V, or getting a battery pack that can put

Now that the high desert weather is finally warming up, it is time to finally power on my9 volt QMX for the first time and take it into the field for POTA. However, I can't find any mention of the

That did the trick! I reflowed all of the RF components which didn't help, then I saw your message. Sure enough a factory reset made the sweeps looks great!.?And I do have about 3.6W out on all bands

Did you search for this? There are reports about false alarms. Not sure there is really an over-current. To be save you could connect a USB cable to the QMX and check the resistance between the

Hi Alex, 700 mA when pressing T means the TX is working, at least until the PA. If nothing comes out AND you hear really nothing from the RX maybe the output has a short. There are some "unused"

Hi Ludwig, Using a QRP labs dummy load, with input voltage of 11V (and current 113 mA) then when pressing T I see ~700 mA input current, and around 14 to 18V on the dummy load, so looks like 2 to 3

Excellent news, Zhenxing! Enjoy your QMX! ... JZ

Finally received PCM1804 from Mouser today. It's my very first time replacing sth this tiny so it took me quite a while to get it done. But I think it's working now! 20M now is very quiet and

I didnt build the trx by myself. it was build by qrplabs. Am 2024-04-06 21:45, schrieb Evan Hand: Links: ------ [1] /g/QRPLabs/message/120510 [2]

You could try a breakout board to isolate all but the data pins. https://www.amazon.com/Treedix-Female-Output-Breakout-Connector/dp/B09L816S5W/ref=asc_df_B09L816S5W/ 73 Evan AC9TU

I would look for a short on the power pins of the USB-C connector.? The QMX does not use USB power, but the connector could be shorted.? Did you fill in the holes of the USB-C connector and maybe

Hi, i tried to measure the current, but the USB-Port turned off. better than destroying. i am worried about to try on another computer, maybe it will not have this safetyfunktion. I could try it