Good info. Did CCI modify the original designs or do you think they're marginal? I've built a few of the CCI kits and they worked okay, but I had to add filter boards after them. I used a simple Drake TV-1000-LP on one of them since I only used it on 10m when I had it in the trunk and my "rig" was an HTX-100 which was only a 10m rig. I modified the CCI RF COR circuit a lot because it wasn't reliable, but the amp itself was; I still have it!