| FrequentlyAsked Questions (FAQs) |
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What is a simplex repeater?
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A
simplex repeater consists of a radio on a simplex frequency and a
digital voice recorder. When a signal is received, the recorder stores
the message (usually up to 60 seconds worth max.). When the received
signal ends, the digital voice recorder retransmits the message on the
same frequency. A commonly used term to describe this activity is
"store and forward" which is what a packet radio digipeater does. |
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What's the difference between a duplex
repeater and a simplex repeater?
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A duplex repeater receives a transmission on one
frequency and simultaneously retransmits it on another. The
result is that the re-transmission is heard at the same time that the
original transmission was made.
A
simplex repeater stores the transmission and waits until it has
finished before retransmitting it on the same frequency.
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What are simplex repeaters used for?
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Simplex repeaters are ideal for emergency or temporary
situations where you need to communicate farther than a handheld radio
would be able. Simplex repeaters can be installed in vehicles and
parked on a hilltop to increase the transmission range.
Simplex
repeaters are also handy for radio checks. When you send a signal to a
simplex repeater you'll hear exactly what you sound like retransmitted
back to you.
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Who makes simplex repeaters?
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Argent Data Systems ADS-SR1 NEW!
PrimeHERTY
Pinfold Simplex Repeater
NHRC NHRC-3 Repeater Controller
Quad
Energy PR-50
EchoStation - A software
implementation
Others?
Please email the
information.
(No endorsement of the products above should be
assumed.)
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How do you set up a simplex repeater?
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Some simplex repeaters simply attach to the external
speaker jack and the microphone jack of the radio. When a signal is
received via the speaker jack, the unit records the transmission and
then retransmits it thru the microphone jack on the radio. This is
known as VOX (voice activated).
Others will use the transceiver's COS and PTT lines.
Also,
check out the simplex
repeater guidelines.
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I have further questions. Who can I
ask?
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Since many radio operators are not familiar with
simplex repeaters, the SimplexRepeaters email list is a great place to start. To
subscribe click here
and follow the simple instructions.
Simplex
repeaters can also share many problems that are also associated with
duplexed repeaters.One excellent source of information is the Repeater
Builders Technical Information Page.
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What are the guidelines of the email
list?
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Any discussion of simplex repeater related issues is
acceptable. This can include, but is not limited to, how-tos, locations
of existing simplex repeaters, operational questions, etc. For sale,
trade, or wanted postings are allowed. For sale postings MUST include
price.
Absolutely
no SPAM is allowed!
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Simplex repeater links:
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Simplex Repeater
YahooGroup email list
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