KXTA's New 50,000 watt transmitter Plant

This is the transmitter site as seen from the top of the Auxiliary transmitter... The Phasor and Dummy Load are at the right.

The hatches in the floor are where three of the transmission lines go out of the building, under a 165' wide driveway, and up the side of another building, to feed three of the five towers..

In the equipment racks, the audio is delivered by two sources; a leased high-quality phone line, and a separate microwave link from the Burbank Studios.
These two meters show that both paths are active. If one of them fails, an alarm is sent to the remote control at the studio.

For more details about the microwave paths:

An oscilloscope is used to watch both the RF Envelope out of the transmitter, as well as the audio source going into it. This gives precise control of the modulation level, and makes sure we're operating legally.

A number of monitors keep track of the system; the unit at the top measures the operating frequency (we must be within +/- 20 Hz. of 1150,
and the unit below that checks positive and negative modulation peaks.

Below that there's a panel that selects which of the two 50 KW transmitters are monitored, and finally the phase monitor checks the directional antenna parameters.

This is a special meter built by Dorrough Electronics. It displays the peak as well as the average levels of an audio source at the same time. It's invaluable for setting up the processing of an AM Station, as you can easily see the limiting and compression and the ratio between them.

To learn about the Phasor and the Feedlines:

To learn more about the Dehydrator we use to keep dry air in the transmission lines:

Line Size

Just how big is a 3" Line, Anyway ?

Copyright 2005 by Vital Sounds - ALL RIGHTS RESERVED