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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.

3
votes
1answer
48 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 ...
10
votes
3answers
600 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
138 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
113 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
2answers
106 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 ...
2
votes
1answer
47 views

Maximum size of a command on an RLC Club Deluxe 2

With reference to an RLC Club Deluxe 2 repeater controller: What is the maximum size of a command? What is the maximum size of a macro? The manual does mention "Limits on Macros" but all it says is: ...
1
vote
1answer
94 views

Empty Repeater Slots and Percent FM when downloading D-STAR repeater list

When downloading a repeater list from dstarinfo.com as shown in this video: https://www.youtube.com/watch?v=BJCvLsK1cKc, there are two numeric fields: Empty Repeater Slots Percent FM What are they? ...
1
vote
2answers
62 views

Tune step not being small enough?

I recently got an Icom ID-51E PLUS2 and its smallest tuning step is 5kHz. I looked at the list of repeaters in the UK and many are between 5kHz stops, such as 145.6125MHz. Is this expected? Do you ...
1
vote
1answer
104 views

Two devices + one antenna

What I have: GSM 900 repeater 900 - 2400 MHz MIMO antenna 2xSMA MIMO 4G Router works with 1800 MHz LTE Is it a good idea to connect GSM repeater via SMA splitter to one of the antenna cables? Will ...
1
vote
1answer
120 views

440 MHz repeater, how would I set one up?

I’m currently attempting to set up my first 440 MHz machine. From all the research I’ve done I need two radios, a controller and a duplexer. I was going to go with a DR-1x. Is this correct? Would I ...
2
votes
1answer
127 views

How to program Kenwood TM-742A 6-meter repeater offsets for 500kHz

All the 6-meter repeaters in my area use a 500kHz offset, but the Kenwood TM-742A defaults to 1MHz offsets. Is there any way to make it easier to program the local repeaters into this radio?
0
votes
1answer
78 views

How to find repeaters in Pakistan? [closed]

How would I find a repeater in my area (Pakistan)? Are there any web resources? Can I use repeaters to listen only (using an SDR)?
3
votes
1answer
95 views

Why is repeater post-xmit “burst” stronger than repeated signal? [duplicate]

I have no problem triggering GB3LW, and after I release PTT I get the strong burst from the repeater confirming that it "heard me". But if I use two radios, the receive-only one will only hear that ...
1
vote
0answers
282 views

Blocking a specfic DMR ID

Is it possible to block a specific DMR ID Rx, sort of "ignore"? If so, is it repeater-based, or it has to be set locally, on radio? Speaking of popular md380/390 radios, there is a "Call Alert" ...
3
votes
4answers
199 views

Are directional couplers ever used in duplex repeater systems?

I understand that most single-band repeaters will use a tuned cavity duplexer to isolate the received signal from the transmitted signal, since the frequencies are very close and extremely sharp ...
5
votes
1answer
188 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?
1
vote
0answers
40 views

Can two directional antennas be connected without an amplifier to improve reception? [duplicate]

Can two identical yagi antennas be linked together to improve a cell phone signal? The idea is to put one antenna on the rooftop and the other in the house, and connect the two with feedline but no ...
4
votes
1answer
123 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 ...
4
votes
3answers
379 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 ...
0
votes
2answers
141 views

Radio wont RX or TX on repeaters. Fine in simplex

I am having this issue and cant seem to find a solution. I am running a Yaesu vx6r radio, I have had it for about 6 years. Today, I fired it up, as I had just built a 5 element 70cm yagi for satellite ...
2
votes
4answers
139 views

Colorado to Ohio with UV-5R

My brother (in Ohio) just passed his Technician test. We both have UV-5R equivalent radios. I have my General (in Colorado). Without physical modifications to our radios, can we have a QSO? I've been ...
4
votes
1answer
419 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 ...
3
votes
4answers
1k 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 ...
5
votes
3answers
241 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 ...
6
votes
3answers
2k 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 ...
2
votes
0answers
594 views

Tips on how to setup a MOTOTRBO XPR-8300 Repeater for DMR Ham operation? [closed]

Goal I am trying to setup an XPR-8300 MotoTRBO repeater ultimately with the goal of joining DMR-MARC. Reasoning My area does not have a repeater that's reachable on handhelds. I got a fairly ...
2
votes
1answer
236 views

What FCC rule allows Skywarn and other spotters to restrict repeater use?

When amateur radio operators associated with the national weather service "close the net" on a repeater and request only severe weather reports on that frequency, what FCC ruling is in effect, given ...
7
votes
1answer
200 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. ...
5
votes
1answer
393 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 ...
3
votes
6answers
1k 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 ...
7
votes
4answers
5k 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 ...
3
votes
2answers
374 views

70cm antenna for an apartment

I have a blind friend who can't put anything outside, and is restricted to antennas near the window in his apartment. Luckily he lives closer to the top, which helps with range a little bit. He has a ...
4
votes
2answers
2k 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 ...
0
votes
1answer
84 views

What does the current signal look like just south of Las Vegas? [closed]

I was wondering if it would be worth it to engage some of the hotels south of the strip to see if they would allow us to put a repeater on one of the buildings there. Just wondering as the Marriott, ...
3
votes
1answer
350 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 ...
5
votes
3answers
599 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 ...
5
votes
5answers
7k 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 ...
2
votes
1answer
135 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 ...
13
votes
2answers
12k 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 ...
1
vote
2answers
342 views

VOIP link to repeater- simplex or duplex?

I have obtained permission by the Rocky Mountain Radio League to link my AllStar linking system node to their repeater via RF or on the input frequency. Since they have such a long tail, they will ...
7
votes
3answers
2k 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 ...
9
votes
1answer
655 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.
2
votes
2answers
342 views

Is it possible to radio between America and India?

My friend and I want to see if we can Ham radio between San Jose, CA and Bangalore, India. We're beginners and are going to be using handheld radios. Are there any networks of repeaters, that could ...
7
votes
1answer
148 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 ...
3
votes
3answers
619 views

How do I get a coordinated frequency assigned for my repeater?

I am thinking about putting up a 70cm repeater up on my High School, where they have a very tall roof. By the time It is ready to put it up, I want to make sure a frequency is reserved for the ...
6
votes
4answers
4k 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 ...
3
votes
3answers
583 views

SSTV on repeaters?

Just a simple question and the answer is probably no, but am I allowed to transmit a picture using SSTV on an FM 2 meter or 70 centimeter repeater? I am in the United States.
4
votes
1answer
2k 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?
15
votes
2answers
1k views

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 ...
2
votes
3answers
165 views

Am I allowed to transmit on one repeater and receive on another?

Lets say 2 people can receive on 2 repeaters equally, but one hits a repeater transmitting better and the other person hits the other repeater better. Am I allowed to transmit on one repeater, and ...