Hi Cecil

En Cecil Moore va escriure en Wed, 12 May 2004 09:44:10 -0500:

40-50 years ago, we had to lower the transmitter Z usually with
a built-in adjustable pi-net tuner.

Do you mean before the existence of electronic simulators, when
people actually build electronic apparatus? :^) When I studied
electronics I was in the last course where students would
actually build things. From the next course on student's
practices would be made only by computer simulations :^(

As to your comment, I know valves exist but I have never learned
/ been taught how to use them. :^(

73s

Toni - EA3FYA