I never bought a Kenwood TL-922 because I could never rationalize the cost verses a Drake L4B or Sb-220. However, when I did get to look at one when i was asked to repair it I immediately was shocked to see the mechanical layout as it would pertain to RF. I noticed ALL the drawbacks as pointed out by Tom. ALthough it DOES work, some simple adherence to sound practices could have made it a better "rip off" design. The better strength of the chassis is a big improvement over the SB-220. Try to lift one comapred to the SB-220. It's solid and strong. Thats where they made improvements, but kept the downfalls of all the rest. Although Denny Hadd (had) his faults, he knew enough to directly ground the grids. You won't see any of his amps with floating grids. His faults were of a different breed. Now for the FL 2100 et al. Now this is a nightmare, this is about the only amp I ever saw that could be unstable just sitting on the bench. Fortunately I noticed this problem on someone else's dime. Hence, I have never bought one of these. It makes me laugh how this person tried to stablize this amp. Gives me a pick up when I am down in the dumps. When Eimac first came out with the 3-400/3-500 tubes they offered a simple amplifier design. Their recommendation is clearly a GROUNDED GRID design. All you have to do is look around the internet and you can see this schematic offered by Eimac themselves on how to use the tube ( they designed )in GROUNDED GRID design. Also, as Tom pointed out old things die hard. Many things carry over from old design. Back in the 70's when I was working on car repairs it was a big joke to look at the next generation of engine design to deal with emissons as set by the EPA. Remember the "smog pump", "anti back fire value" etc.? This is how they handled unburned gas emissions. Later we found out the answer to all this was to have a more complete combustion burn. When this problem was solved all these "band aid" add ons disappeared. Of yore, any 300 plus horsepower engine was a gas guzzler, today we have 400 plus HP engines getting 25+ MPG. One fellow in tulip land still buys into the single point ground, this is evident on his website with the TL-922/SB-200 mods. How a single thin wire connection could compare with a full chassis ground plane is beyond me. Want the perfect amp? Build monobanders with all parameters specific for that band. You'll be surprised.