Done those.
Also 'acorns', 'peanuts', Dekatrons, Klystrons, and Traveling Wave Tubes. Cavity magnetrons are a different sort of critter, but also on my list.
And if 'unit count' of vacuum tubes matters?
Mcguire AFB. Summer of 1965. Cross-trained on Semi Automatic Ground Environment, NYADS AN/FSQ-7.
My 'regular' mount was AN/GSA-51, BUIC II, 680th RADRON, Palermo, NJ.
Modern stuff. 'Transistors'. Didn't need 3 Mega Watts of power, nor a man-made lake for cooling. SAGE surely did.
AN/GSA-51 was also the first-ever dual-CPU 'puter, (SAGE just alternated its two IBM Whirlwind II). Moreover could have either CPU switched-out and replaced on-the-fly while still managing the Air Battle.
Never touched it, but IIRC, SAGE BOADS was actually slightly larger and a wee wee bit more capable among around 26 or so of the monsters. Closer to Lincoln Labs, so got more TLC from the Gurus with their experiments.
You didn't really think there were only
teen-agers in the room did you?
Bill