Author Topic: 500 KW AM radio transmitter  (Read 254 times)

Offline MRMILSTAR

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500 KW AM radio transmitter
« on: February 12, 2020, 05:05:53 PM »
I found this very interesting video describing the only 500 KW AM radio transmitter to ever operate in the US. It was built in the 1930s and is now decommissioned. Everything about it is enormous. Huge vacuum tubes, huge inductors, huge capacitors, huge transmission lines. Huge motor-generators were used to convert AC to DC for the vacuum tube filament power to prevent 60 Hz hum on the audio. The vacuum tubes were water cooled and had their own outdoor cooling pond.

This is radio engineering on a massive scale which is not done anymore.You can skip the first 10 minutes if you want to get right to the good stuff. Have a look.

Steve White
Cedar Rapids, Iowa
Retired electrical engineer

High Voltage Forum

500 KW AM radio transmitter
« on: February 12, 2020, 05:05:53 PM »

 


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