I love the silver hailine-finished front panel.
It still looks cool, after manufactured over forty years.
Inside the TS-511, there are ten vacume tubes are used.
IF stage is not only SSB filter but also CW filter installed.
The S-model drive unit uses a 6GK6, a 12BY7A used for D-model.
Twin 6LQ6 was used for the final stage.
Previous owner widen the window for the cooling purpose.