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Well call it the pilot in me. I have an old check list I perform prior to any transmission and have never blown any final in all my years. On my vintage valve transmitters, cooking output tubes would

Hans said there was a volume issue, and he is working on AGC, SSB, and being able to manually adjust the time. Thought there would be another update by now....patiently waiting! 73's Michael N2ZDB

Hello Evan No, firmware is the same... It's just a documentation error, the QDX-M web page should have been updated. The firmware for QDX and QDX-M is the same. I have corrected the QDX-M page

I'm not quite ready to call it fixed but I got all my bands back! I found the MOSFET that controls 20M(I think Q5) was faulty. The output from the microcontroller would only come up to 2.1V instead

Hi Darren, One other point to check would be the power supply.? Verify that the voltage is not dropping.? Also, monitor the current. Can you hear signals when connected to an antenna?? Check on

Fascinating discussion. Thanks! 73, Jerry, AC5JM

Could you repost the RWTST graphic.? I have low 10m power on my QDX.

WSPR is a Weak Signal Propagation Reporter system, someone needs to be on the other end to RX. To get the most out of using WSPR one needs to REDUCE the TX power to somewhere between 9mW and 200 mW in

Hi Darren. I would definitely first look at the audio muting circuit R60, D5 and Q7. You should see 5v on the gate of Q7 when the radio is keyed. If not there, look for it on the cathode first, then

Good evening all. On my qcx+ build which went well this time, I have an audio issue that I'm trying to debunk.? Everything seems to be working as it should - about 4.97 watts in the dummy load- no

Are you sure you downloaded the correct firmware?? There are versions for a single-band QDX.? Try an older version and see if that helps. Correct multiband QDX is

Thanks, that was my first thought too. I've done a factory reset, and also reflashed the firmware and then done another reset with no change.

I am sorry, the included picture is barely readable. Here is an attachment with the image file

I would suggest a factory reset.? ?It looks like the EEPROM got messed up. Look in the operating manual: https://qrp-labs.com/images/qdx/manual_operation_1_10.pdf 73 Evan AC9TU

On Sun, Sep 3, 2023 at 02:16 PM, Hans Summers wrote: > > Hi all > > I agree a series resistor would prevent the GPIO conflict. The GPIO pin is > necessarily configured as push-pull. A series

Still looking for what would make the QDX lose 20,30,40,60M. I am sure I did something to the board or a component but I can't figure out which. I've been poking around the board for a few days.

I meant sma of course, I've not see a method too edit sent text to update it.

I finished building my QMX kit today.? On initial power, it started correctly in the bootloader mode.? I could load version 1_00_009, restart, and hear audio blasting out of my headphones (a good

You are incorrect. Even a perfect antenna is subject to random events such as antennas falling down or coax faults. A couple of diodes are cheap insurance for unforseen high-VSWR situations. ---

Adam, You are close.? It would work if the Digi filter goes below your sidetone.? I do not know for sure the cutoff of the QMX digital mode filter.? I believe it goes to 300Hz, so your scenario