Here's a fairly common example of the use of hybrid circuits used in the 60s for scopes. In this case it's being used a decade into the 21st Century. This is the deflection amplifiers for the 3" CRT monitor currently under construction here as mentioned in Karens' 625-NBTV thread.
The tubes are two ECC91s (6J6s) twin triodes, perfect to develop the 125v p/p (or thereabouts) for the CRT deflection plates. The semis are simple current sources feeding the cathodes of each differential pair.
The circuit and photo are attached, the empty area to the right is now occupied by the two ramp generators required...sadly sand-state.
The items in red are simply not set in stone yet and may change in the final version.
Steve A.