Radio feedback

[vefrancis]

When trying to connect with a local repeater, I can hear what sounds like a confirmation, but I also hear my voice after the confirmation sound. Am I connecting? Why do I have my voice feedback? Thanks for the help from a newbie.

[OffRoaderX]

Sounds like you are connecting, and it sounds like it is a 'simplex' repeater which records what you say, then re-transmits it.

[vefrancis]

I thought there was only one type of repeater. What is a simplex repeater? How will I know the one I'm contacting is simplex?

 

[Lscott]

15 minutes ago, vefrancis said:

I thought there was only one type of repeater. What is a simplex repeater? How will I know the one I'm contacting is simplex?

 

It's also commonly called a "Parrot" repeater.

The way they function is the repeater will record, some seconds to a minute or so, of the input audio stream. Then on termination of the reception it will re-transmit the audio just recorded usually on the same frequency.

These repeaters are less expensive due to the fact they don't need bulky and costly cavity filters, used to isolate the receiver from the transmitter, for true simultaneous reception and transmission of the audio stream. Some have built one for remote emergency communications.

https://www.youtube.com/watch?v=o05ILiIg5o4

https://www.argentdata.com/catalog/product_info.php?products_id=98

The negative aspect is the delay due to the necessity of recording the input audio stream and then the re-transmission. Many people find using a Parrot repeater rather irritating due to the delay. 

[vefrancis]

Thank you . Very informative

[MarkInTampa]

20 hours ago, Lscott said:

It's also commonly called a "Parrot" repeater.

The way they function is the repeater will record, some seconds to a minute or so, of the input audio stream. Then on termination of the reception it will re-transmit the audio just recorded usually on the same frequency.

These repeaters are less expensive due to the fact they don't need bulky and costly cavity filters, used to isolate the receiver from the transmitter, for true simultaneous reception and transmission of the audio stream. Some have built one for remote emergency communications.

https://www.youtube.com/watch?v=o05ILiIg5o4

https://www.argentdata.com/catalog/product_info.php?products_id=98

The negative aspect is the delay due to the necessity of recording the input audio stream and then the re-transmission. Many people find using a Parrot repeater rather irritating due to the delay. 

I've got a Argent simplex repeater I use every now and then on my base station. I use it for testing radios and antenna's by myself in the field. It makes testing nice not having to rely on somebody manning the base station or annoying folks on the local repeaters with a radio check every 30 seconds when swapping antenna's or range check.

Also keep it around if somebody wants to hear what they sound like on a normal repeater. Plug in the unit into the mic jack real quick and repeat the repeater back to the repeater. Say that 10 times fast. Neat little trick I've used a few times.

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