That's a good observation, but the telecom and radar did sort of go hand-in-hand. The radar is typically close to the action, but the information needs to get

That's a good observation, but the telecom and radar did sort of go hand-in-hand. The radar is typically close to the action, but the information needs to get back to HDQ, usually hundreds of miles away. So being able to ad-hoc get lots of telephone connections and/or tty links from a radar site back to the generals was a common need. That is, war money was being applied to both.