Well the Tune (i.e. Plate) and Load controls do constitute a limited range matching network. Yes, it allows you to match into a wider range of antenna system impedances than solid state rigs that don't have internal tuners but it's still limited to something in the 3:1 to maybe 4:1 SWR range most of the time. A decent outboard tuner will allow you to match into 10:1 or higher SWRs which means much greater mismatches than what the rig's PI network can handle. The Drive control is for peaking the drive circuitry and also peaking the receiver's preselector and isn't really involved in output matching but I suspect that was a typo in your post. Yes, the idea with an external tuner is to match whatever the antenna system gives you to something pretty close to 50 ohms. So a good tuneup procedure that also follows good operating practices (i.e. minimum QRM) is to tune up your rig into a 50 ohm dummy load. Then with a Kenwood hybrid it's easy to switch to the antenna tuner and set the rig to Tune mode which is relatively low power and safer for the final tubes in terms of working into a bad match. Don't retune the rig, just adjust the external antenna tuner controls to achieve a low SWR. Once you figure out good settings for different band segments (e.g. CW/Digi vs SSB band segments) write them down on a note card and tape it to your desk near your tuner so you can quickly get back to saved settings. Yes, there are so called EFHW (End Fed Half Wave) antenna systems that have become popular in recent years. They don't use traditional radial systems and with a bit of counterpoise wire or a long enough stretch of coax they just feed through a 49:1 or 64:1 RF impedance matching transformer into the end of wire that's a half wavelength long on the lowest supported band. They'll then yield fairly good match (i.e. low SWR) on the harmonically related bands. So if your end fed antenna is roughly 130 feet long and fed with an appropriate matching transformer it should yield a decent match on 80m, 40m, 20m, 15m and 10m and the SWR may not be too bad on some other bands. But without that matching transformer that's not really what you have. If you have 130 feet of wire fed from your coax and you add a few ground or elevated radials attached to the coax shield you have a 1/4 wavelength antenna on 160m that generally won't provide even a halfway decent match on other bands. If you don't have the radials or some kind of counterpoise wire (typically a single elevated wire that's fairly long for the frequency in use) you don't really even have a 1/4 wave monopole (aka Marconi antenna) and your home's electrical grounding is serving as the missing part of the antenna. That's not good from an RFI standpoint and can lead to both transmit problems and receive noise problems. Your tuner may or may not be able to take the impedances presented by that kind of an antenna and match it reasonably well to the rig. If you really want to run a single end fed wire I'd either configure it as an EFHW with an appropriate matching transformer or run the wire straight out of the single wire terminal of your tuner and add whatever you can manage as radials/counterpoise. That second suggestion (a shack tuned single wire) really isn't a great way to go as your transmitting antenna starts right in your shack so it's very common to have RFI problems doing that but yeah a lot of us did that back in the day and it certainly got us on the air and antenna tuners are still sold with single wire connection posts on the back so someone must still run this kind of antenna. Personally I'd run a well understood and well behaved antenna system such as: - Dipoles or Fan Dipoles to cover multiple HF bands - A shack tuned Doublet fed with balanced feed line - A trap or set of parallel (aka Fan) verticals with a good set of radials - An inverted-L run against a decent set of radials - An EFHW with appropriate matching transformer and either a longer coax run choked at the appropriate place or a short piece of explicit counterpoise wire at the transformer box Or something along those lines instead of 130 feet of wire fed with coax back to the shack. Yeah, you can probably make the single wire antenna work, but there are better antenna systems out there that are well behaved and typically work better with fewer problems than what you've described. Either way, play with tuning up your rig into the dummy load to get a handle on how the rig tunes into a good load and to get used to properly tuning the rig. Then figure out what you need to do with your antenna system to cover the bands you want to operate.