Which describes the proper procedure for turning on a tube-type transmitter?

The proper procedure for turning on a tube-type transmitter involves sequencing the controls to ensure the components operate safely and effectively. Starting with the filament control allows the tubes to warm up properly, which is essential for their operation. When the filament is turned on, it heats the cathode within the tube, enabling electron flow when the plate control is eventually activated.

Waiting for a couple of minutes after turning on the filament is crucial because it ensures that the tube reaches its optimal operating temperature. If the plate control were to be activated too soon, it could lead to inadequate performance or damage, as the high voltage could cause arcing or other problems when the cathode is not yet properly heated.

Once enough time has passed, activating the plate control allows the radio frequency circuit to energize, permitting the transmitter to function effectively. This methodical approach maximizes both the lifespan of the tubes and the performance of the transmitter, highlighting the importance of a precise start-up procedure in tube-type equipment.