Thanks, everyone. Great information. Wondering if maybe this explains some issues I've had with two Baofengs hooked up to the Arrow. I never hear myself over the satellite, even when others hear me, and one of the radios goes haywire when trying work AO-85. Perhaps not having a diplexer is contributing to front end overload (which I guess is a problem for the Baofengs in any case). So here's a question. Suppose the ham radio gods gifted you with a little spare cash, and you could either create an SDR-based setup (as described above) or buy a second radio, say the FT-857. What would you choose? I can see pros and cons to either option. All said and done, the price differences aren't THAT great, once you throw in the diplexer and the Windows tablet. An used FT-817MD can be found in the $500 range and FT-857s can be bought new for $850. Would a really cheeeeap Windows tablet (say, around $50) be sufficient for SDRplay?