Tonight's PAARa meeting's speakers are the Bay Area chief engineers for ClearChannel, Chuck Waltman N0CW and David Williams KD6QPR. Here is the talk overview.

This is an AM broadcast final transistor that produces about 400 Watts. Modern AM broadcast transmitters are digitally driven with 96, 128, or 256 finals, all run at eith 0 or 100% except 6 that are run at 1/2, 1/4, 1/8 etc. To round out the sine wave. This one has 8 transistors.

A transmitter with these finals runs at 92% efficiency.

- posted by Leigh @ 04:58 z