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Jerry, why not reading QMX QMX_plus Startup ( /g/QRPLabs/wiki/36878 ) from the QRP Labs Wiki? 73 Ludwig

2nd UPDATE: i checked the voltage upon powering up with the switch on IC101 which should provide 3.3V under normal circumstances as i understand the process.? The max i get at the input of IC101

Another issue is increased unintended inductance and capacitance around those BS170 leads, especially the gate and source leads.? Probably not an issue on 80m, but significant 10m or 6m. Jerry, KE7ER

I've chosen the same board Steve. I found the YouTube video previously referenced ( https://youtu.be/QNENyu97w2A ) AND there are some schematics available on-line. I found that the overcurrent

Sockets are a great idea for development but their extensive use in the 70’s and 80’s in professional equipment revealed that they were ultimately rather less reliable than the devices they held A

On Sat, Nov 23, 2024 at 02:31 AM, Dave (G8PTN) wrote: Jerry, Dave, Thanks! My QMX+ is transmitting again. Replacing the BS170s AND the SN74ACT08 SOIC quad logic gate driver did the trick. 73, Cal

I’m anxiously awaiting the arrival of my QMX+ and assume this should also work on the + model. If no one can confirm this I will do so in about a month. -- 73, W8JH, Joe

Interesting, some good info in that post from Hans. Though I'm quite sure I saw black blocks in the LCD, and that there was no solder joint problem. It's possible I hadn't plugged the front panel

[email protected]> wrote: Searching for "black blocks" in /g/QRPLabs/messages finds /g/QRPLabs/message/112198 from Hans. Look for bad solder joints between the

Curse you, autocorrect!!! Wrong: <? Grant reports that he can now power down the rig by pressing the volume encoder, but does see the black squares on the display. Fixed: but does see the black

From http://shop.qrp-labs.com/qmx

Antoine, what firmware are you using? -- 73, Dan? NM3A

Hi Jim, Since this is a prebuilt QDX, I would contact QRP-Labs (Hans) for support. You can not do much without a serial connection. Have you tried to load a new firmware? From the operating manual:

They are assembled for 12.0 volts unless you specifically ask for a 9.0 volt build. -- 73, Dan? NM3A

New to the QMX, wondering what the power up sequence is. Is this documented somewhere? When fiddling with replacing the 3.3v and 5.0v SMPS's with linear regulators, I found that the boot firmware

I will be doing another CW on the air practice session Saturday 11/30/24 . Anyone is welcome. This practice is intended for operators who are new to CW or needs some practice. IT DOES NOT MATTER HOW

Grant, After the firmware is loaded, the QMX or QDX stop looking like a USB drive. So when the computer tries to read the drive, there is an error. After loading a new QL firmware, my Apple OS gives

My hat is off to Jeff as well. ?He helped me before with a qmx+. and is doing it again! ?I promise not to build another one of these, hihi. ?At this point I am wondering why ?the other qrp lab

Reception is fixed, had to rewind T507 but still no TX This is from a 20m TX test to a dummyload

Grant, if you see something at the display VCC (5 V) should be on. VCC is only generated when the firmware is running. It looks like your QMX is running in some way but there is at least a problem