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Garrett, Your results seem inconsistent to me like maybe a probe is on the wrong place. You say B1 & B2 have continuity, and A1,2,3 to B1 is open, but to B2 is 10 ohms. Either B1 to B2 does NOT have

Greetings, Using my QDX for the past year or so. Very, Very happy with the radio. Last night I noticed I lost reception. Checked WSPR for reception of any kind..... nothing. 9 volts in and 4.2 watts

Hello Bev 12V unless you specifically ask for 9V. 73 Hans G0UPL http://qrp-labs.com https://www.buymeacoffee.com/g0upl

Parks On The Air (POTA) with my QMX (#133) has found a 100% activation success rate using a simple wire antenna that tunes 40M and 20M with the aid of the 4 State Tuner. 18 gauge speaker wire with one

My QMX is getting close to the head of the queue.? Will it be built for a 12V supply or a 9V supply? Regards Bev COAA Portugal

Yay! Roger ?Get BlueMail for Android ?

Hey, all! I moved my radio over to a PI and it works!!

First rule out solder bridges and stray pieces of wire on your board. ?My experience in this kind of short on a QMX main board is that it’s from a failed chip. ?5V is supplied to the chips in the

Hi Glenn, There is a short somewhere. ?VCC (5V is getting pulled down). ?Also what concerns me most is the LIN_REG_EN signal. ?It is supposed to be at logic levels (0V to 3.3V) and is directly

Good morning, Evan. I tried that and it didn't solve my problem. Thanks, though. I'm still trying some things. I'm also in the process of getting a PI together to give a try.

I just did exactly the same thing, but I think the jump in the power supply voltage from going in and out of current limiting toasted something in my unit

That's so dead that it seems to be more than bad L401 or T401 soldering, not sure it would look that bad with them not even fitted. It doesn't seem to be detecting any signal at all. This might

If it were me I'd redo T401 (the trifilar). If that is not wound properly then the Rx will not work at all. -mike/w1mt <dj0cu@...> wrote:

OK Folks, So, today I reverted to 1.06 Firmware on the QMX and can confirm FT8CN works perfectly with that firmware but fails to work properly (as described in my original thread) with later

Paul, QMX has no spike voltage issue at end of transmission because of the built-in wave shaping system. Regarding Zeners for QDX, they may provide some protection against the hi-Z SWR case, but

Yesterday I have successfully energized the QMX for the first time. As recommended, voltage to 7 volts, current to 250 milliamps. So far everything is fine. Today I wanted to send for the first time.

I'm going to order the basic 5351 synthesiser board, I have 3 mcu chips here, tried all but no change so I'll change the 5351 as they are cheap. In the meantime I'll play with sdrconnect for wspr

Hi Don, Yes, I remember your original posts and did try the diode method on a couple of QCX's until the little AGC module was developed. As I said, I'm sure Hans will include AGC limiting in a future

That is indeed a dream come true. Thanks for the pointer. And Barb, I like the idea, but do need the CAT option. But I have it bookmarked for later. -- 73 Lex PH2LB https://www.ph2lb.nl/

Tried that, no change. Below couple of screen shot, maybe they tell you something? I have no idea? Thanks Paul DJ0CU