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Graham and Ted, See the discussion at /g/QRPLabs/message/85457 (near the end) for the various mods. Lou? ?W2ROW

Ken, I simply made a 5 pole filter as fitted in a Softrock. I omitted C11 as I had no idea how to calculate its value, or whether it would need a different value for L4. I've not checked harmonic

Yes, that's a cute tuner (or a good box of parts) for the money.? But what are the mods to that which are spoken of, and what advantage do the mods have over the original design? Tnx, Ted K3RTA

Alan, you said; After configuring all bands to use the 10m LPF ….. How did you get a 10m lpf on the qdx please? I looked at Hans lpf schematic and downloaded the ‘Elsie’ lpf calculator

Speed knob = a “finger dimple” is the small outer thing sticking off the knob in the photo so you can just put your finger tip in the outer thingy and spin the knob faster than just using a finger

Hi Ken YES! You can call the EEPROM file whatever you like, when uploading to the QDX. When reading (downloading) files from the QDX, the file names listed as the contents of the "USB Flash disk" are

Graham, I think this is the tuner they are talking about.

Can you please direct me to the recommended mods for the $15 tuner Thank you

I found a way to listen to what the QDX hears. Now CW can be decoded by the wetworks between my ears. Keying is something that I have not figured out. I have a Morserino, and I was thinking of porting

Hey there. Thank you. This is very useful. I was able to implement this with a QDX Transceiver.

I'll pretend my name is Al ?. ?I use the infamous $15 ebay tuner that I've made the recommended mods to. It's a perfectly good standard T-match. I tune for maximum hiss just like we used to do in

I just ordered the same 8GB kit.? I love the case.? Also ordered an additional 12V 3A filtered power supply.? Something QDX related might use it. Mark K9TR

Bruce K1FFX <rosen.bruce@...> wrote: Thanks! Seems to be working, at least the GUI part. If someone has problems: sudo pip3 install soundcard guizero pyserial sudo apt-get install python3-tk

Thanks Evan. I will give that a try. I'm on W10 Pro so I should be able to find the settings. Tnx de Arnie W8DU

Why wouldn't I understand ? I've been licensed for nearly 40 years. Did I miss something ?

It’s a ham radio thing, you wouldn’t understand.

You can find the program files for firmware revision 1.03 here ( https://www.rosenatthewheel.com/qdxsdr103.zip ) (the revision 1.04 version is in progress). It's a ZIP file with two Python source

Hi Murat The value of the rectifier smoothing capacitor isn't too critical. The time constant for 10nF and 28k is 280us. The time between cycles at 1MHz is 1us so there will be adequate smoothing over

That QCX looks goddamn cool!!

Speed knobs ? I don't get it. Is this some sick xhamster.com reference?