| Description | The General Electric GL-6251 tetrode for TV transmitters. This type of tube was used in the power amplifier of KCCI's first transmitter, installed in 1955 and relegated to backup service in 1974. The rig was retired in 1985, when the station's original building was vacated. There were four of these tubes--2 visual, combined for a total output of 50 kilowatts, and 2 aural, running at less than their rated output for a total of 26 kw. |
