I’ve been wanting to drag my Ten-Tec Century 21 on to a summit… this might be the push I need =)
It was made in 1977. I’ve used it for chasing SOTA many times, as well as my Ten-Tec Century 22 (made in 1980). Neither rig is very heavy (for a desktop radio!), but they are bulky. Both require a special fast-acting circuit breaker between a 12V DC supply and the radio - if current draw is too high, it shuts power off to the radio. Crude but effective way to protect the finals. The Century 21 has this circuit built in to the internal power supply, but an external breaker must be used when powering the radio via battery.
Some videos here: