I wonder how many hams violate the FCC power limit. I know some must do it and likely show up on 75 & 40 meters. Perhaps they were power hungry CBers that got a ham license. Most antennas are rated 2KW such as the EFHW-8010-2K with a balun. I assume a wire antenna without a balun must be used with RG-17A coax. You think a 4CX5000A is used? Also a 3CX3000A7 that is way less expensive vs a 8877 will produce at least 5000 watts. Reason is about ten 4CX5000 and 3CX3000 are for sale on ebay and ebay does not normally sell to radio stations. So, someone is buying these tubes. I think a 4CX500oA would make 7500 watts output using a 60 amp 240 volt AC input. A cheap 'pole pig' transformer would power the amp. Note- I do not condone illegal power.