"WShoots1" wrote in message
...

Were they used in early TV UHF tuners?

Bill, K5BY

I don't think so. As I understand, they did work well at UHF
frequencies, but the circuits were very touchy to keep working. There
was alot of excitement for the tunnel diode in the old magazine articles
of around 1960, but it was quickly overshadowed by improved conventional
transistors.

Frank Dresser