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Battery measures 12v “key up” and sags to 10v - 11v on “key down” depending on band selection.

Thanks Russ! Fortunately the Internet Archive's "Wayback Machine" has an archive of that

Those scans look nice.? You have gained at least 6dB on 15 and 17 - maybe more. Now to test it in practice and see if you notice the change. Yes, there is some other 'gain' factor going on; something

hi, sorry, today I'm not able to test ... will inform you soon... tnx so long Udo DF4BJ

A fully charged 12 V battery is definitely not 12V

Steve, in my experiments, I found that when setting the "Tune %" in the protection menu, you have to exit fully from the menu system for that setting to take effect.? If I back out just one higher

Hi Matt - just reduce your input voltage by adding some series diodes, rated at 2A or so. Regards Roger 8P6RX

The approach I used was adding a high current diode in the power line between the battery and the radio to drop the voltage and reduce the power output. -- Steve KA0SM

The QMX mid-bander (60m thru 15m) is one of my primary radios for portable QRP operations for nearly a year now. The “problem” is that it puts out too much power in CW mode. Here are the numbers

Possible Bug - I am not sure if this has been reported previously.? My apologies if this has already been discussed. I am finding that the setting for the "Tune %" under the Protection menu has no

Thanks Stan. I did not realize that the RF dB values are using a common offset. That means that the RX performance on 17 isn't that different between BPF1 and 0 - only about 3dB. I decided to try

I did a comparison of the microphone input on two of my mid-band QMXs. I used the same microphone. The attached screen shoot shows how significantly higher the noise is on the second QMX. 73, Zrinko

On 4/08/25 I had a CW practice / rag chew session on 30 meters. I worked three stations: Date / Time Call Bnd Frequency Mode Power Rec Snt Name SPC# Comments Off 4/8/2025 14:14 W9TO 30

Hans and Braden, I think I need to explain my proposal a little bit further to avoid misunderstanding. I attach a PDF outlining the present design and my alternative. In the present design a

There is some small interaction between the two windings on a binocular core which ultimately limits the directivity of the coupler, but it is not at all an issue for the QMX. I would usually include

Hello Braden What would be a simpler way of arranging it? I can alter it... 73 Hans G0UPL http://qrp-labs.com https://www.buymeacoffee.com/g0upl [email protected]> wrote:

Thank you. I wasn't sure if there was interaction in the core between the two windings.

N2DI's video helps a lot, but overall my comment would be that the filter system is just needlessly complicated, at least from a CW operator perspective. Not sure about SSB or digital.

It won’t make any difference. I tested one wound in the same sense and again in the opposite sense and no difference. These are two independent windings. As long as you put the wires in the circuit

I also struggle with background noise that is present in my modulation. I have tried all the options and the only thing that is certain is that the noise is reduced by reducing the gain. The noise