Yeah, I agree although I think that when I put a PL-259/SO-239 mated combo on a VNA that it was closer to 3dB at a 1 GHz. But that's been awhile back and I could be mistaken. But, even dropping 3dB in a SDR receiver really isn't the end of the world. If I were using it in a transmitter application I might care a bit. I just don't see why they aren't making these things with the proper N connector as I can't imagine it would have any impact on manufacturing cost whatsoever.