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Please, some suggestion? Thank you very much 73, Juan LU9CYV

Todd, In FW rev 1_00_011 a feature was added to enable the TX voltage (in RX) to be set well above zero. (3a: Mod high in RX). Leaving it at zero was creating undesired capacitive loading of the

Hmmm... my diodes look like they're correctly oriented. I can't locate any evidence of damage or shorts to any components, particularly around the toroids and inductors. I'm absolutely willing to take

Try using the suggested baud rate. See operating manual, page 7 and note 3 on page 8.

hello could you pls indicate which end of L503 at the PCB is the right one?

Hello, same problem as some other users (DG8YBJ, DG8RCN, DD6DO). Checked the usual R and C parts, all are correctly populated. Voltage at IC402 pin 9 (MUX common) is between 4.86 to 4.91 V, when

Thanks Jeff.? ? I'm still looking it over some each day trying to determine if I messed up somewhere, but so far, nothing.? The only voltage that has ever been applied was the first attempt to

I have 2 QDXs Rev 3 unassembled with enclosures. I am asking USD 95 each with shipping to CONUS If you buy both, I will include a QCX mini Rev 1 that is assembled but not working. The screen lights

I soldered the diode across L14 on the top side of the board.....seemed to work for me. Hundreds of QSOs since and finals are still intact on my QDX. (Made it 440+ before blowing the original BS170s,

My experience with VDD shorted to GND on the main board is that it’s usually but not always in the MPU chip. ?You can determine that with a milliohm meter. ?Find where on the board the lowest

72, Bill, WB4HIO

...is it possible to set the center frequency for either of the QxXes? Happy New Year to all of you! 73 de Razvan dl2arl

For accurate power measurements you need a 50 ohm output impedance, a short cable to a good through line meter and a high quality 50 ohm load right on the meter output (or a terminator type meter) if

FB, Hans ! 72, Bill, WB4HIO

I've spent some time this afternoon identifying bugs with the 1.00.014 firmware. This is what I have found: - calling CQ on 30m CW into a well matched antenna (SWR circa 1.2:1), towards the end of my

That sounds similar to what happened when I fried my output transistors.

Hello all, I have a Rev2 board that I wish to run on the high bands and can't identify, from the schematics, the processor pin that needs to be grounded. Any clues please? 73 Phil G8DDN

Thank you to everybody. I figured the response might be “That sounds about right”. I just wanted to double check. I have a QMX that my son finished building yesterday and I was comparing them

Good to hear it's working! Having a slightly higher SWR on 20m is normal, try moving the 10 turn windings as far as possible from the 1 turn ones, it should improve it a bit. In my case, I couldn't

Hi Danny, Peter, all Attached is a comparison of the QCX vs QMX CW filtering. These are actual measured responses. Not simulation or calculation. It's quite clear how much steeper the QMX filter