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Radio
Broadcast Technical Consulting and Sales |
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RF Relay/Switch |
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Built by M. W. Persons and Associates, Inc. |
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Front view of a
rack mounted RF switch, which can be used to switch one FM RF exciter to
one of two transmitters or it can select between two RF sources going to
one device. These are often used to switch one of
two 950 MHz STL transmitters to a single antenna.
The panel is 1 3/4" high and 19" wide. Note the panel has rolled edges to make it more rigid. |
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This one operates by way
of a front-panel toggle switch. That switch has logic to turn off
the transmitter that is not going on the air at that moment. The
switch contacts have a maximum rating of 28 volts AC or DC at 2 amperes.
The price is $310.00 plus shipping and tax. For splitting a receive antenna, see: http://mwpersons.com/rf-splitter.htm |
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Back view of the relay. The relay has N connectors for low VSWR up to 2 GHz. The maximum throughput power is 1000 peak envelope power at 50 MHz. It is 800 watts PEP at up to 150 MHz, and 500 watts at up to 1000 MHz. When used with the BNC adapters, the maximum allowed power is 250 watts or less. |
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A previous version shown here with LED lights, on the front panel, show which position the switch is in. |
| Front view of a
rack mounted RF switch, which can be used to switch one FM RF exciter to
one of two transmitters or it can select between two RF sources going to
one device. These are often used to switch one of
two 950 MHz STL transmitters to a single antenna. For splitting a
receive antenna, see:
http://mwpersons.com/rf-splitter.htm
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In the foreground is a 12 VDC wall power transformer. The logic input is "ground going" requiring a momentary or continuous ground to get the switch to move from one position to another. The switch will remember which position it was in before any power failure and will return to that same position when power is restored. |
| Back view of the
switch. The logic section is on the left and the actual RF switch is
on the right. This switch has low VSWR up to 1000 MHz. Shown
here is the switch with N connectors and N to BNC adapters. When
used with N connectors, the maximum throughput power is 1000 watts
at up to 150 MHz and 500 watts at up to 1000 MHz.
When used with the BNC adapters, the maximum allowed power is 250
watts.
As shown, the N switch
with BNC adapters is $395.00.
Variations of the above are available upon request. |
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page last edited 12/28/2011
