1st. My 30L1 was the best amp I ever had. It likes 220v and the coax does not have to be 20.5 feet. I used about 3 feet of coax and a Radio shack relay to key it with a battery per the article by W6SAI.
2nd For all you G5RV lovers . That ant was designed for old tube xmtrs with Pi Net works to match it. It s a good ant on 20 and a dummy load on others. Just put up a dipole as long as you can and feed it with open wire feedline and a tuner with a 4 to 1 balun. Lew McCoy my old friend W1ICP taught me that this was the best dipole. Look for a used Heath 2060 tuner which can handle a KW and use this between the amp and ant. W6SAI wrote many articles about the poor performance of the G5RV.
If you buy a factory made ant you land up with the G5RV. Guys, its not hard to build a simple dipole. Thats what ham radio is about.
3 The odds that the input has to be retuned is very low. That is not your problem. You need a real tuner at the end of th
Absolutely agreed with this.
While maybe not the finest amp I ever owned or used, the 30-L1, in my experience, performed yeoman's duty day in and day out in my shack for over two decades at least. Even after obtaining full legal limit capability, the 30-L1 was often the first choice for breaking many a DX pileup. CW mostly, as that is my mode of choice, but that 600W also worked well SSB and even for the occasional (horrors! say it isn't so!) foray into the AM, damn the tubes.