Why no UHF converters with RF amp?

[dieseljeep]

Originally Posted by Steve McVoy

The U70 has two IF amps, but no RF amp. The CT-100 doesn't have a UHF RF amp, and I don't know of any 50s tuner that had a UHF RF amp.

Milwaukee was one of the larger cities that had UHF channels. Originally they were really low power. Anyone that wanted decent reception on UHF, had to install a corner reflector type UHF antenna.
It had to be a cost factor, for the manufacturers. IIRC, amplifier tubes made for UHF frequencies were rather pricey.