Questions tagged [repeater]
A device that receives a signal and re transmits it either in the same band or by re-modulating it in a different band.
101
questions
5
votes
1answer
562 views
Why am I not hearing repeater identification more often?
I just bought a 2m/70cm handheld. I programmed in the local repeaters and have been scanning them for a couple of days. Only about twice have I heard one of the repeaters come up and identify itself. ...
1
vote
2answers
56 views
Is power output or something else to blame for my duplexer failing?
A Ham buddy of mine and I were trying to setup a UHF repeater in our area due to a lack of them. We had two Motorola CDMs, one a 1250 and one a 1550, and we purchased a $200 or so reject only duplexer ...
20
votes
1answer
4k views
Why do people say, "get a nickel," on repeaters?
Sometimes, I'll hear someone say "wait a moment, I'm getting a nickel," and then drop the carrier only to resume talking. Why?
2
votes
3answers
111 views
Store and forward system like voicemail for hams
I want to be able to get in touch with hams in my area when we are not both on air at the same time, but are close enough to each other for VHF communication. I want to be able to use my radio to call ...
7
votes
3answers
551 views
Why don't I hear the CTCSS tones when listening on the repeater input frequency?
I am newly licensed (Technician) and bought a UV-5RA as a cheap way to check out what's going on in my area and see if I'm finding it interesting enough to get a better UHF/VHF HT.
The other day I was ...
4
votes
2answers
242 views
If repeaters share the same call sign are they "Connected"
Newbe here,
I was looking through repeaters in my area and I noticed that there were a few repeaters that shared the same call sign(even though they run on different frequencies). Does this mean that ...
1
vote
1answer
70 views
Repeater build problems
I'm trying to build a UHF repeater using two Motorola radios. I have a cable connecting the two radios that was built for doing such a project. The radios have been programmed for the appropriate ...
1
vote
0answers
61 views
Is it possible to setup a private network with DNS lookup using app_rpt?
I am going through a bit of a headache trying to find this information. I have a lot of people interested in a private simplex node/repeater network using Asterisk/app_rpt, the same software ...
0
votes
2answers
70 views
Repeater design using round robin transmitters to increase duty cycle?
I would like to build an FM repeater using a short stack of Kenwood TK-890H rigs adjusted to 70cm USA amateur band, but the model has a 100W rating with a duty cycle of only 20%. 20% isn't nearly ...
1
vote
0answers
52 views
Repeater transmit voice message/warning on input frequency?
I'm in the process of planning a UHF CB radio repeater. And I've heard there are ones around that transmit a voice message/warning on their input frequency (as well as standard output channel ident) ...
1
vote
1answer
269 views
How does a Baofeng radio know an incoming transmission is from a repeater?
Baofeng radio's have two menu options for squelch tail elimination (STE). Item 35 is for general simplex STE, and item 36 is for repeater STE.
My question is how would the radio know if a transmission ...
2
votes
4answers
153 views
Ham radio repeater
I am wondering if using a VHF/UHF ham radio for emergency (I get injured, become ill, run out of water/food, etc.) communication while hiking the Continental Divide Trail would be possible.
I see that ...
3
votes
2answers
127 views
Why do repeater duplexers have notch cavities between transmitter and antenna?
Why are notch filters used on the transmit side of a repeater duplexer?
The primary purpose of a duplexer is to keep the transmitter output out of the receiver input, since they both operate at the ...
2
votes
1answer
52 views
Hypothetical question: Repeater with power amplifier
This is my first time ever asking a question on stack exchange or any stack site, so please be gentle if I missed something here.
I am currently working on building a UHF (GMRS) repeater, and while ...
1
vote
1answer
67 views
Repeater carrier as access
I'm just getting into ham radio. I'm trying to connect to a repeater here in Ireland:
Channel: RU260(RB10)
Output: 433.250
Input: 434.850
Call sign:EI7SHR
Access: Carrier
What does the "...
2
votes
1answer
85 views
Help with Repeating 439 MHz signal
I have a remote wireless water tank level sensor.
It transmits at 439 MHz with an apparent max range of 100 metres.
Unfortunately I need about 200 metres.
How can I extend that range?
3
votes
1answer
375 views
Talk Around vs Reverse
I thought that "Talk Around" and "Reverse" were two ways of referring to the same thing: swapping a channel's transmit and receive frequencies so that one could e.g. listen for ...
4
votes
2answers
1k views
Beginner listening to a repeater - only hearing one station
This morning I tuned in to a repeater about 12km from me (in the UK). I could hear activity, but from only one station. I could tell that there were other stations using that repeater from the ...
1
vote
1answer
141 views
When are licenses required for 900 MHz operation in the US? When are they not required?
Forgive me if this is not the proper forum, but I am an electrical engineer and a total radio novice.
I am designing a product that may contain off-the-shelf industrial radios that act as repeater ...
1
vote
2answers
308 views
Why is a separate repeater required for digital modes? Why can't an analog repeater be used for digital modes?
Regardless of the mode: digital or analog, the radios always transmit sinusoidal EM waves. So wouldn't a regular analog repeater be able to rebroadcast that EM signal regardless of its encoding?
4
votes
3answers
288 views
Can one repeater be used to hit another repeater?
Here's why I wonder about this: I would love to be able to reach an Echolink-enabled repeater or similar, but I live on the other side of a ridge that would probably block a transmission to the ...
1
vote
1answer
368 views
Repeater Features: What is e-power and link?
I am so new to ham radio that I don't even have a transceiver or a certification study unit yet. Just learning all I can right now. So, I'm looking at a repeater that I might be able to reach with a 5-...
5
votes
2answers
2k views
What are the regulation requirements for running a repeater?
When I try to find information on the requirements to run a repeater, I just see a lot of results related to building one. But I'm wondering about USA regulations.
Does one need a particular license?...
2
votes
1answer
71 views
Baofang uv-5rA/ repeater trouble
I programmed my Baofang UV-5RA radio to my local repeater about less than a 1/4 mile away. When I cue the mic and release, I get a signal from the repeater. However, I can only hear people if I have ...
3
votes
4answers
631 views
Are there any "parrot" repeater software projects out there?
I happened across a discussion on building repeaters for Amateur radio, which lead to looking at GMRS repeaters (because apparently this is a potential source for inexpensive 70 cm Amateur repeaters), ...
3
votes
4answers
331 views
Is there a freely accessible repeater database?
The well-known repeater listings/apps don't provide a database that you can download and use freely for any use in building your own app.
Is there a such a freely accessible repeater listing database ...
3
votes
5answers
420 views
Malicious interference to repeater
Our local repeater is severely sabotaged by unknown parties. For example, broadcast radio transmissions are repeated. Other times someone will send a transmission, when a qso is in progress. Local ...
0
votes
1answer
58 views
Audio too high, how to troubleshoot
I am using a TYT TH-9800 with a 10 m half dipole antenna on low power (5 W) to connect to a WIN linked repeater (+5.0 MHz offset and 123.0 tone).
I made contact with two other stations and was told ...
1
vote
1answer
220 views
What is meant by CC 7?
I am seeing a repeater on RepeaterBook
444.8375
+5 MHz
CC 7
Portland, Providence Portland Medical Center
Multnomah
WA7HAA
OPEN
ON-AIR
I'd like to programme ...
0
votes
2answers
58 views
Local Relay with static
On our local Relay there are from time to time transmissions, where only static can be heard. Most transmissions via relay can be heard clearly. What could be the cause of this?
1
vote
1answer
97 views
New quad-band mobile receives while transmitting?
I've got a week-old TYT TH-9800, a quad-band (10/6/2/70cm) mobile, Chinese knock-off of a Yaesu HT-8900. So far, I love it -- several times the power of my HT, and a better antenna actually outside ...
1
vote
2answers
176 views
How to plot transmitter coverage area?
As an Extra class licensee, I should probably know this... I am working on a web application for repeater owners. I would like to include an estimated coverage area, provided they have entered all of ...
2
votes
1answer
217 views
How come wifi repeaters aren't just amplifiers?
Not sure if in scope for ham SE. I'm very new to this.
Most wifi repeaters contain an actual router and two radios set up to receive and transmit at different frequencies.
Why can't we have a wifi ...
5
votes
3answers
1k views
Call sign ID for a "homebrew" or improvised repeater?
I saw a couple YouTube videos last night about setting up a repeater using a pair of cheap hand-held radios and, at its simplest, an audio patch cable to connect the speaker output of one radio to the ...
4
votes
4answers
3k views
How can I be sure I'm actually hitting the repeater?
I'm just starting to use 2m and 70cm bands, which normally use repeaters to extend range beyond a mile or two (limited mostly by line of sight, as I understand it).
When I'm at home, however, I'm not ...
1
vote
1answer
1k views
How do I set the "tone" in my new BaoFeng BF-F8HP?
I just got this new 2m/70cm hand-held, my first ham rig. I neglected to order the computer connection cable with the radio (it's on the way, and I've already installed the Chirp software on my Linux ...
9
votes
3answers
919 views
In-house repeater?
At one time I was active in the local SKYWARN program, but then we moved and I find myself 10 miles from the local repeater. Given the various obstructions between it and me, I can't really hit it ...
1
vote
2answers
536 views
From where do repeaters get their power supply?
I imagine that a repeater atop a building for which the repeater owner has sought permission would be sharing the same power source as that of the building occupants, but:
What if the repeater is ...
1
vote
1answer
461 views
Should I add call signs with /R suffix to the logbook?
Sometimes in FT-8 mode I receive calls like this one:
It happens 2-3 times a week.
The problems are: 1) I never could look up such call signs 2) I tried to reply, but never got answer 3) I don't ...
1
vote
1answer
86 views
Who has the ability to physically manipulate a repeater's controls?
I know that repeaters on VHF and UHF are primarily automatic, but there will be times when they will fail, or something is not working. The repeater may not respond to the remote control. In these ...
8
votes
1answer
345 views
How to clean up profanity on airwaves
We have a repeater here in Southern California (Sylmar K6GE 147.435), and no matter what time of day or night there are a great many operators spewing tremendous profanity, disrespect and meanness ...
2
votes
3answers
716 views
How can I tell if someone is mistakenly transmitting on a repeater output frequency, instead of the (offset) input frequency?
I sometimes run a VHF radio net for our club, on a 145.170 MHz channel served by a repeater with a -600 KHz offset. People who program their transceiver with the proper repeater offset mode use it ...
8
votes
3answers
245 views
What should I put on a QSL card for a repeater contact?
From time to time I'm a new ham's first contact - usually on a repeater. If I want to send the new ham a QSL card, how should I distinguish a repeater contact from a non-repeater contact? Is there a ...
1
vote
1answer
100 views
Repeater for 1/4 square mile campus
I am a noob to a lot of amateur radio and I am investigating and planning a repeater setup to be installed in my workplace. We are on a hospital campus in Chicago, IL and have many tall buildings ...
1
vote
2answers
129 views
Repeating UHF Handheld via UHF vehicle transceiver
I have recently taken on programming radios for my workplace in Chicago, IL. We have an old base station (Kenwood TK863G-1) that I wanted to know if it would be possible to use as a repeater similar ...
3
votes
1answer
357 views
Using a Duplexer and Diplexer in Series
I have 3 Motorola CDM750s that I’m using to build a multi-purpose, portable, temporary repeater. There are 1 VHF and 2 UHF radios. I want to be able to use it as either an in-band UHF repeater or as ...
12
votes
3answers
2k views
Why can't I hear myself from a second radio when bouncing off a repeater?
I am a relatively new ham, and haven't joined any club yet or participated in any nets. I have, however, hit a repeater just to know I can do it. I was told my sound was scratchy (no surprise there) ...
1
vote
1answer
260 views
building a relay for 5.8Ghz?
I'm interested in building a relay for analog video sent from an R/C aircaft. The idea is to get around obstacles like hills and increase distance a bit.
Rather than just applying more power, I ...
1
vote
2answers
469 views
How do 0 offset repeaters differ from offset repeaters?
I found a listing for a repeater with 0MHz offset and I don't know what to expect from a repeater like this that is different from a traditionally offset repeater.
repeaterbook.com/repeaters/details....
1
vote
3answers
275 views
Trouble figuring out what is meant by this repeater callout?
On a repeater I frequently listen to there are a handful of expected automated messages. Namely, at the top of the hour it tells the time and the callsign, and every 10 minutes it sends out it's ...