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Hello OMs, I've received my QMX for 60-15m last week and finished assembled it. Very nice rig, working properly with TX output beetween 2 - 4W depending the choosen band. Digi is also OK with

Hi, I have been having the same symptoms with a new setup on a Raspberry pi 3b. I have just set the sound level to 100% (using amixer cset in terminal, See link below) and suddenly I'm transmitting

Hello Ron, Yes you are correct they don't. I tried this by just changing Band and switching aerials to match, it seemed OK, but looking on the scope with a D/L it doesn't switch. Sorry for the

Hi, the measured increased output power could be a result of an improper LPF selected. In such case the output could consist of a strong third harmonic component. 3.5 x 3 = 10.5 5 x 3 = 15 7 x 3 =

I've had a really odd situation with presets. Some of mine, when recalled, present similar to as described here. My 80m & 40m though often Txs fine but at (relatively) insane power. 8-10w out and

Ok, so given both 60 and 40 share the same rx filter then I wonder if the fault is inducing noise from elsewhere in the radio due to a fault. This could be a solder bridge, dry joint or any of the

Yes 60m has similar noise, my antenna is for 40m so too small for 60m. The noise is high on 40m but not 30m.? Signals on 40m are very weak.? I have other qrp rigs and at nite there are many signals

Hi Bruce, From memory my Sweeps look similar to yours for 40m. You speak about the loud noise on 40m when compared to other bands, whilst you may not use 60m does it have the same noise on rx? Given

Hi Ed If I understand correctly, the issue might be the way the button cell is inserted in the socket. The small metal fingers on the left hand side of the button battery socket must be on TOP of the

I have a scope, but I'm not sure what I'm doing with it. I did measure some voltages in RX and TX mode of that mosfet. I have attached a photo showing those.

Can anyone confirm, does my RF sweep above confirm the caps c40x and the torroid L401b are good and working?? Seems to me from reading if either of those were wrong for 40m I would notice it on a bad

To begin with the QMX+ was working great until I couldn't get the battery voltage down underneath the GPS.? So, I started looking for the missing voltage and got my multimeter probe across a couple

I agree. Stopped using Presets. Has Hans posted on this topic?

Was 20-80 tx and rx - and has been a solid unit for months. Now 20-80 Receive 80m only transmit. Terminal software only shows 80m - so it thinks it single band. Fresh firmware, 1.10, and no other

Bi Ludwig Thank you for the reply.? The probe is a PP-150 which came with the oscilloscope.? I have used it for a few years. Its bandwidth (@10:1) is 100 MHz.? The probe compensation allows the

My statements above only seem to be true on 40m, so I opened a new thread for this. I did not experience key click issues with recommended settings on 15m or 20m.? Please see my other thread and

Did you ch3ck the alsamixer settings on it? Mark N5OBC [email protected]> wrote:

Nice work on the cable [email protected]> wrote:

Doug, Made it up from 2 right angle 2.1mm pin barrel pigtails. 73 Kees K5BCQ

Nice, where did you get that cable?