Which Quansheng UV K5 mod to buy? Green, small or big orange?

I think about accepting the challenge and boldly solder SMD where I’ve never soldered before: Doing the Quansheng UV-K5 4732 addon PCB modification myself 🙈

But… before soldering I need to buy the right board to solder, and there seem to be 3 different options as of today: The green one (which consists of a PCB, a conventional through-hole resistor and a tiny SMD capacitor) and 2 orange PCBs of different sizes with different layout (see photos). The green one seems to be most challenging and the orange ones look easier… but I have no idea at all how these 3 options differ in terms of functionality! Maybe one of you has & could share their knowledge / give a recommendation?

Thx et 73 ;)

https://lemmy.radio/pictrs/image/da9f66ac-8205-48a8-a0fc-8ef1709cc0d9.jpeg

https://lemmy.radio/pictrs/image/867cb9ca-bd8c-486a-967c-b9e3b893f4c1.jpeg

https://lemmy.radio/pictrs/image/ed7fd92d-8802-4bba-a997-54e136a1dfe2.jpeg

OneCardboardBox,

Wait, what do the PCB mods do?

musevg,

AFAI understand their basic functionality is to extend the frequency range for those UV-K5 devices down to 18 MHz when used with a hacked firmware. At least for RX, everybody warns about not to use a modified device for sending out of band (2m/70cm).

But the green PCB includes a resistor (for replacing the “choke”?) and microscopic SMD capacitors to replace on the radios main board to fix problems (idk which ones) with the radio. The orange boards include neither a separate resistor nor a capacitor, but the big orange board includes a second circuit which seems to be an amplifier to improve SSB volume. This is my interpretation of forum posts & product desctriptions I don’t understand completely - thus my original post, hoping to find somebody who’s savvy on this topic.

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