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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26 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 ...
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5answers
132 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 ...
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5answers
1k 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 ...
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8answers
5k 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 ...
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5answers
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 ...
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42 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 ...
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1answer
75 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 ...
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5answers
3k 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 ...
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2answers
51 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
63 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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2answers
101 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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0answers
690 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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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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3answers
411 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
269 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
182 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
293 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
114 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
103 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
3k 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?
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3answers
183 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
193 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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4answers
2k 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 ...
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5answers
9k 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 ...
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3answers
247 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
159 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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2answers
95 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
82 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
2k 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 ...
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4answers
6k 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 ...
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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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1answer
182 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
216 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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1answer
166 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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1answer
201 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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1answer
139 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
268 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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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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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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2answers
77 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
169 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
373 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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4answers
351 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
127 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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3answers
896 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.
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1answer
137 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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3answers
279 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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2answers
449 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 ...