SimplexRepeaters

This page is dedicated to simplex repeaters and the
simplexrepeaters@yahoogroups.com email list.

 

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Sponsored by:

Argent Data Systems - AD-SR1  Argent Data Systems AD-SR1 Simplex Repeater

FrequentlyAsked Questions (FAQs)
What is a simplex repeater?
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.
What's the difference between a duplex repeater and a simplex repeater?
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.
 

What are simplex repeaters used for?
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.
 

Who makes simplex repeaters?
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.) 

How do you set up a simplex repeater?
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.

I have further questions. Who can I ask?
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.

What are the guidelines of the email list?
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!
 

Simplex repeater links:

Simplex Repeater YahooGroup email list