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Radio
Broadcast Technical Consulting and Sales |
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Custom Built |
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Built by M. W. Persons and Associates, Inc. |
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For AM radio stations with 1000
watts or less of RF power, this RF switch is a quick and easy way to
select between a main and an auxiliary transmitter. There are four
N-F connectors for the RF. IE: main transmitter, auxiliary
transmitter, antenna, and dummy load. Whichever transmitter is not
on the air is connected to the dummy load.
Because of the lead lengths inside the box, the switch can only be used up to 2 MHz. Higher frequencies, such as FM 88-108 MHz, require a different switch architecture. The switch comes with a 24 VDC power supply and can be controlled by a remote control system. In case of a power interruption, the switch will automatically return to the position it was in before power was lost. |
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Tally lights indicate and 2 VDC
status outputs tell a remote control system which transmitter is connected
to the antenna.
There is built-in logic to prevent a transmitter from running into a dummy load on an unattended basis. The Test/Normal switch allows testing of a transmitter into a dummy load. The entire assembly is in an electrical box 8" x 8" x 4". It can be mounted in any position on a wall or ceiling. |
| The switch, as shown, is $540.00 plus shipping and tax. it comes complete with a schematic diagram. The switch is not suitable for use on frequencies above 2 MHz. |
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page last edited 05/11/2008
