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.

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21 votes
1 answer
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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?
webmarc's user avatar
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18 votes
2 answers
31k views

How do I make a RF propagation map for a repeater?

Let's say I have a repeater. Knowing all of the information about antenna height and gain in each direction, as well as power, how can I create a map similar to this map I saw of a repeater in ...
Skyler 440's user avatar
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18 votes
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Why do repeaters use cavity filters?

Repeaters apparently often use large, expensive cavity filters to connect the receiver and transmitter to the same antenna. Why aren't typical electrical circuits, such as inductors and capacitors ...
Adam Davis's user avatar
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16 votes
4 answers
5k views

OK to use any repeater?

There are a number of repeaters in my area, each belonging to a particular amateur radio club. These guys are all friendly and willing to chat but I was wondering if it was bad form to make use of a ...
s3c's user avatar
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13 votes
1 answer
4k views

Is there any legal recourse against unauthorized usage of a private repeater in the USA?

Can the FCC revoke an amateur license for unwelcomed use of another amateur's private/closed repeater system? It's clear that private repeaters are allowed, per 47 CFR 97.205(e): Limiting the use of ...
natevw - AF7TB's user avatar
12 votes
3 answers
4k 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) ...
Bernem-KG7NUB's user avatar
11 votes
5 answers
8k views

Is it illegal to key up and not identify?

So, I key up on a repeater to see if it works, or to see what cool courtesy tone they are using. I don't do anything else. Is it illegal or bad ham radio etiquette to just key up for a second, key ...
Skyler 440's user avatar
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11 votes
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2k views

Fastest Speed allowed for CW FM repeater ID in USA

What is the fastest legal WPM I can use for my repeater's Morse code identification? I am in the USA.
Skyler 440's user avatar
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10 votes
4 answers
11k views

Operating proceedures: testing an HT against a repeater?

Assuming proper licensing for the frequency, what is the proper operating procedure to test whether an HT works and is within range of a (documented as open, 2M or 440) club repeater? Should one wait ...
hotpaw2's user avatar
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9 votes
3 answers
363 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 ...
user3486184's user avatar
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9 votes
3 answers
2k 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 ...
J_C_R's user avatar
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9 votes
2 answers
428 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 ...
ChiliYago's user avatar
  • 235
9 votes
1 answer
472 views

Advantage of 6 meter repeaters

6 meters seems to be a place where when the conditions are right, repeaters may interfere with each other from far distances, but when the conditions are normal, repeaters are similar to 2 meters. ...
Skyler 440's user avatar
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9 votes
4 answers
15k views

Building a portable event repeater

How does one go about building a portable repeater for use at events? Preferably at low cost, and with a minimum of bulky parts (so it's travel friendly). Obviously you'd need a pair of radios to ...
Trevor Johns's user avatar
8 votes
3 answers
1k 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 ...
QuantumMechanic's user avatar
8 votes
5 answers
13k views

Wifi passive repeater (antenna to antenna connection)

I have two buildings. Building A has wifi (2.4GHz) infrastructure, Building B doesn't. One side of building B can pick up the wifi signal from building A. I want to passively extend the signal through ...
askvictor's user avatar
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8 votes
3 answers
349 views

How do club codes stay secret?

To use auto patch, IRLP or other special repeaters, you need the club code from the local club I am part of, which is a DTMF code. But I was thinking, DTMF can't be very hard to decode, and if ...
Skyler 440's user avatar
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8 votes
1 answer
187 views

Identifying regulations for interfering stations

I'm working on tracking down some 2m repeater interference, and I have identified that the offending signal is a spur transmission on a commercial pager service (that lands right on our repeater input ...
W5VO's user avatar
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7 votes
8 answers
8k views

VHF/UHF digital single-frequency repeater without duplexers?

Some digital voice protocols are time slotted (TDMA), i.e. the transmitter of a station is not on all the time, and multiple stations may transmit digital voice on the same frequency at the same time ...
oh7lzb's user avatar
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6 votes
2 answers
6k 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?...
Bort's user avatar
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6 votes
3 answers
2k 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 ...
Zeiss Ikon's user avatar
  • 4,097
6 votes
3 answers
586 views

What is the reason/origin of conventional US repeater offsets?

In the US, the common (though not universal) repeater offsets are ±600 kHz in the 2m band and ±5 MHz in the 70cm band. How and why did these offsets come to be standard for amateur repeaters? The ...
ESV's user avatar
  • 161
6 votes
2 answers
6k views

“Repeater” vs. “reflector”

In various topics on repeaters, IRLP, D-Star and EchoLink, I see people refer to these 'nodes' (for lack of a better word) as reflectors. A quick Internet search for these terms comes up with all ...
captcha's user avatar
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6 votes
1 answer
1k views

Is it legal to use an R identifier for my repeater in the USA?

I have been told by someone that my repeater is not allowed to have a slash r on the end of transmission because that is an identifier for the Russian Federation. Almost every repeater locally uses ...
Skyler 440's user avatar
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6 votes
3 answers
5k views

Is it possible to have 2 FM transmitters on the same frequency?

Has there been any success in transmitting two simultaneous FM signals? I am assuming if the phase is correct, and the signals are identical, it would be possible. That would be really nice if newer ...
Skyler 440's user avatar
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6 votes
2 answers
4k views

What are the default repeater offsets on 70cm in different countries? [closed]

I am looking for a reference list of the default repeater offsets by frequency and country on the 70cm band, to supply it into a radio control software. Most radios come with a list built-in, but the ...
Georg DO1GL's user avatar
5 votes
2 answers
2k 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 ...
Adam's user avatar
  • 151
5 votes
2 answers
2k 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. ...
plafratt's user avatar
  • 229
5 votes
4 answers
12k 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 ...
Zeiss Ikon's user avatar
  • 4,097
5 votes
2 answers
251 views

When was the FCC Part 97 requirement for a time-out timer removed from repeaters under automatic control? Or, am I just nuts?

I've been remiss in keeping up with the changes in Part 97, especially in the area of repeater stations. A recent discussion about changing the time-out timer's period had me scurrying to the CFR, and ...
KenTenTen's user avatar
5 votes
3 answers
697 views

Is it legal to use animal noise courtesy beep?

For Thanksgiving, I changed the courtesy beep to a turkey noise on my repeater/node. Some other people did it so I thought it was fine. Someone however told me that it did not follow part 97 FCC. Is ...
Skyler 440's user avatar
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5 votes
1 answer
817 views

What's the protocol when making a call on the ISS repeater?

I have mostly only used non-crowded 2 meter repeaters, but recently I tuned my radio to the downlink frequency: 437.8 mhz while the ISS was passing overhead - just to listen. What I heard was people ...
scm's user avatar
  • 193
5 votes
1 answer
313 views

How would I go about setting up my own repeater in the UK?

How would I go about setting up my own repeater in the UK? For instance, what license category would I need, what equipment would should be looking to purchase, and do I have to register it anywhere?
berry120's user avatar
  • 1,744
5 votes
1 answer
5k views

How to access a P25 repeater?

Are there any special instructions for accessing a P25 repeater? What makes it different from a CTCSS/PL-tone-encoded repeater? What special features does a radio need to access it?
Dan's user avatar
  • 1,754
5 votes
2 answers
265 views

Repeater Amplifiers DMR vs Analog

I have recently purchased an amplifier for my repeater. This was actually my first amplifier purchase ever and should probably have asked more questions prior to buying it. The repeater is a ...
Mike's user avatar
  • 171
4 votes
5 answers
978 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 ...
mike's user avatar
  • 211
4 votes
2 answers
624 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 ...
RayLoveless's user avatar
4 votes
1 answer
2k 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 ...
K0SWE's user avatar
  • 327
4 votes
3 answers
3k 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 ...
The Blender Bender's user avatar
4 votes
2 answers
1k 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 ...
Aleksander Alekseev - R2AUK's user avatar
4 votes
3 answers
809 views

Bridging LAN over ~1-2km distance

A friend of mine and I live across a lake from each other, and recently we thought it'd be fun to try and connect our computers together somehow across that distance. Running cable from either side ...
haze's user avatar
  • 143
4 votes
1 answer
286 views

How do repeaters work? (The technical side)

I'm curious how AM and FM repeaters work. Is the received signal demodulated and then remodulated at the new frequency or do they use some other technique?
vini_i's user avatar
  • 143
4 votes
1 answer
212 views

After I call out "Monitering" how long should I wait until I switch frequency?

Sometimes, when I am trying to make contacts, I call out on a bunch of repeaters due to low activity on individual repeaters. I usually call out, wait 10 seconds, then change repeater. Is there a ...
Skyler 440's user avatar
  • 7,600
4 votes
1 answer
97 views

Repeater signal drops at regular interval

Relatively inexperienced ham, starting to call into local nets. With two of the local repeaters the signal drops at regular intervals, approx every 15 seconds. I’ll have a strong signal and then ...
mbond's user avatar
  • 97
4 votes
1 answer
290 views

How can we determine what repeaters to use?

My wife and I are studying for our Technician class licenses. We are thinking about how we could communicate with each other while both of us are at work, she being in Oakland, CA and myself in ...
Jonathan's user avatar
4 votes
1 answer
476 views

What am I responsible for on my link?

I have set up an AllStar link system to a repeater depicted in the picture below: The repeater is under NØMHU's call, and my node is under me, KDØWHB. With permission, I service EchoLink and AllStar ...
Skyler 440's user avatar
  • 7,600
4 votes
1 answer
1k views

Repeater autopatch ("phone patch"): which countries use this?

The section Operating Your Ham Radio in an Emergency from Ham Radio For Dummies recommends using an "emergency autopatch" to reach the emergency services when reporting an emergency from an amateur ...
user avatar
3 votes
6 answers
3k views

Would it be feasible to set up a SSB or AM 2 meter repeater?

Would it be feasible to set up a SSB or AM 2 meter repeater? I want to set up an AllStar full duplex node and like the idea of AM because stations can double without issues. SSB works for weaker ...
Skyler 440's user avatar
  • 7,600
3 votes
5 answers
2k views

Does the ICOM ID-51A's repeater search work with non-D-STAR repeaters?

Has anyone tested the new ICOM ID-51A Plus with regular repeaters (i.e. analog)? I'm looking to quickly find the nearest repeater (and sign on with a PL code!) with like 1 or 2 clicks. Is that ...
Roger's user avatar
  • 171
3 votes
4 answers
807 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 ...
NoBugs's user avatar
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