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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2answers
26 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?
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1answer
46 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 ...
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85 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 ...
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1answer
205 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 ...
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3answers
304 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 ...
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1answer
110 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 ...
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1answer
106 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 ...
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3answers
228 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 ...
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2answers
99 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 ...
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1answer
83 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 ...
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1answer
83 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 ...
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1answer
167 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 ...
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3answers
189 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 ...
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3answers
150 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 ...
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1answer
79 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 ...
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2answers
91 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 ...
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1answer
174 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 ...
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3answers
1k 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) ...
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1answer
196 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 ...
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2answers
227 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....
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3answers
170 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 ...
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1answer
54 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: ...
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1answer
128 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? ...
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2answers
75 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 ...
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1answer
159 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 ...
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1answer
291 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 ...
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1answer
173 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?
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1answer
117 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)?
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1answer
124 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 ...
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0answers
602 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" ...
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4answers
311 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 ...
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1answer
237 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?
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0answers
45 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 ...
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1answer
157 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 ...
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3answers
480 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 ...
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2answers
154 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 ...
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4answers
158 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 ...
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1answer
494 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 ...
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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 ...
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3answers
270 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 ...
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3answers
3k 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 ...
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0answers
738 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
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1answer
258 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 ...
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1answer
274 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. ...
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1answer
512 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 ...
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6answers
2k 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 ...
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4answers
7k 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 ...
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2answers
491 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 ...
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2answers
3k 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 ...
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1answer
89 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, ...