I'm just getting started with my BITX40 kit, without Raduino (at present). First power-up was *incredibly* noisy. with audio seemingly OK. I've since ratted a 1000uF/16V electro cap and 27 ohm (2W?) resistor from a defunct PC power supply and used them to filter the power supply (a junk-sale purchase never since used). Whoopee (I don't Yahoo)! Clean audio - minimal hiss at full volume, indicating healthy rig. No antenna yet, so the rest still unknown, but I've now verified the purchase was worth it! Thanks, Farhan and crew, and folks and hints from here ...
