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27

It's a feature not a bug. When turned on, the weather alert function checks the local NOAA station for its alert tone every 5 seconds for half a second... doing so takes over the receiver. I'd turned it on, and forgotten I'd done so; and how that feature is implemented never registered in my mind. Turning it off solves my "problem." Thanks to ...


8

Yes, you only need a USB2 A to B cable. The IC-7300 already has an integrated sound card, for audio signal transmission, and an integrated serial port for remote control, both of which are connected to computer using the USB2 B port at the back of the radio. In some rare cases, you might also want a Icom CT-17 compatible interface cable. Namely, the ...


6

I went to the Icom America Headquarters office in Kirkland to look over the wall of history of a sampling of their amateur radio gear. This model shown below in the photo is the closest in appearance to the photo posted by the OP. It is an Icom IC-F3, first released in 1997. The OP's image of the HT appears to be a derivative of the IC-F3 called the IC-...


6

It's all of the above: an RF ground a 12 V power ground a lightning ground, for what it's worth a chassis ground to prevent "buzz" on the chassis if your shack 0V is not earthed The manual says to connect it to a ground rod, to prevent TVI, BCI. If you used an end-fed antenna without a ground or counterpoise, the mains wiring (through your power supply) ...


4

As long as you have in fact a line input and not a microphone input on your sound card, that is an appropriate connection. If you notice hum or distortion in the recorded audio, you may need to use an audio isolation transformer. (There is no need for one unless you find it necessary.)


4

The 1750 tone burst is widely used in European the same way that CTCSS/PL and DCS is used for repeater access in the US. I used tone burst exclusively when living in Germany. Tone burst never caught on in the US.


4

The usability of the Baofeng (or any radio with > 1Hz frequency step) will depend on the frequency and mode that you are using. If you use a 12.5kHz frequency step size you will never be able to tune to 435.345 MHz (FM mode) frequency, for example. You have to change your frequency step size to 5 kHz or 2.5 kHz to tune it. Notice though that the Baofeng has ...


4

What do you mean by "regular repeaters"? Do you mean analog repeaters? I haven't found a list of analog repeaters built into the ID-51A, no. But I found this site that will give you the nearest several hundred repeaters to a given location (enter your city/state and click the button). You get them in CSV format which maybe is used by Icom's programming ...


4

According to the user manual published here, page 11, the receiver antenna IN and antenna OUT connectors are located before the TX/RX antenna switching relay. Something like this: Transmitter -------------------- Relay ---- PL connector | Rcv - RX-IN - Jumper - RX-OUT ----- So you can connect a preamplifier between RX-...


4

A new IC-7300 comes with the power harness that plugs into the radio. The other end is connectorless so you can adapt it to your power supply using lugs, PowerPoles, stripped ends, etc.


4

At distances of 150 to 400 kilometers, you will largely be relying on reflection of your signal by the ionosphere. In the winter the atmosphere receives less solar radiation and the ionosphere's index of refraction is less. This increases the critical frequency in the winter, putting the receiving station in the skip zone unless you use a lower frequency. ...


3

https://www.gpscentral.ca/manuals/Icom_IC-R8600_ENG_Manual.pdf Page 21 explains the difference between regular squelch and s-meter squelch on any Icom radio. Noise squelch The Noise Squelch allows the audio to be heard only while receiving a signal that includes less noise than a set level. Activates when the squelch level is set to between 30% and 50% in ...


3

Regarding your original question, according to page 5-6 of the IC-7100 Advanced Instructions document, to receive "narrow" FM of 2.5 kHz deviation, select FILTER2 or FILTER3.


3

Is case anyone is curious, yes...it does. Simply push the middle button and a repeater list comes up. It is simple to set up, as can be seen from this HOWTO guide http://www.dstarinfo.com/Data/Sites/1/GalleryImages/FullSizeImages/id-51-beginner.pdf


3

Since you say that both radios have the exact same problem, I think we can more or less rule out an outright problem with the radio itself. Since you say that you used to be able to hit this repeater easily, I think we can rule out that you would be too far away from the repeater for the antenna that you are using. It also seems unlikely that both radios ...


3

Assuming your question is literally what kind of cable and not what connectors do I need, the answer is: it doesn't matter. Use what is at hand, or what will lay nicely on your desk, or what looks good, or what's cheap at the store, as long as it has two (for a key) or three (for a paddle) conductors. A CW key or paddle is just a switch or pair of switches, ...


3

The filtering in an SDR is nearly always superior to the filtering in any analog receiver. This is because it's very inexpensive to implement a digital filter which can rapidly approach ideal behavior, whereas good analog filters are quite expensive. The only analog filtering required by an SDR is that required to avoid aliasing and overload. Since these ...


3

A spliced joint makes very little difference to an HF antenna electrically, but if you do solder it then you should protect the solder joint from the weather, because the solder will corrode faster than the wire. Right-angle turns in the wire will affect the radiation pattern, but since the radiation pattern of a "random" length wire antenna is funny-...


2

I always use stereo patch cables for connecting my paddles. The have the right number of conductors, three. Almost all stereo patch cables have two conductors and braided shield which is your third conductor. This works nicely with the standard 1/4 inch stereo phone plug expected by the 718. You can go down to Radio Shack (before all the stores close) or ...


2

The inactivity timeout is controlled by the auto-power-off menu setting where you can designate the number of minutes, such as 30 minutes, for the radio to be switched off. But, this is tantamount to turning the radio off just as if you had pushed (and, held) the power button on the front panel. It is not some "sleep mode" where functions are still active, ...


2

The ID-51A Plus behaves differently. Near repeater does NOT work as documented. I am hacking at it to try to figure it out. Following the instructions on the above link provides nothing. The to: is underlined and you cannot use the up down to go to the field to reset it. Basically you are stuck in a catch where a reset is required to get you out. If ...


2

I have just joined so have to answer instead of commenting (not enough reputation yet). I have one of these receivers and know a little about them (I have to say it performs excellently and is very nice to use). They are now fairly old so are a bit prone to dry solder joints and dry caps. There are quite a few plugs/ connectors that can occasionally give ...


2

As your Icom is 'brand new' as you described it, I would strongly recommend to contact Icom support Technical Support Department Dedicated number 800-253-1498 Monday - Friday 4AM to 5PM PST They are there to help you. Just in case you are wondering: I did not find a number for Icom support in Argentina (based on your call) nor did I find a satisfying ...


2

If you don't find a solution based on modifying the radio, this is a reasonable use for two diplexers. You can, in principle, hook them up two different ways: simulate this circuit – Schematic created using CircuitLab These two configurations have in theory the same requirements for the two diplexers — one which separates 30− and 50+ MHz and ...


2

The ICOM gateway terminal mode is a unique mode. It allows you to configure the radio to use the radio, tethered to a computer through a USB cable, to route the communications through the computer, out to the Internet, to access a remote gateway. In this mode, the RF signal of the radio is not a factor since all communications are actually going through the ...


2

A good approach to troubleshooting problems is to simplify them until there's a minimal broken case. The program you have here is complex and there are many things that could be wrong. If the radios are connected just by a cable, the constellation in your screenshot is far too noisy. That suggests there's a problem prior to the equalizer. The periodic ...


2

It's merely a bolt through the case. Under normal operation it shouldn't carry any current, so insofar as grounds come in neatly categorized "kinds", I'd say it's for safety. It is not part of the RF system, or shouldn't be under normal circumstances. If the feedline currents aren't balanced, then this ground connection would be one possible path for those ...


2

I think it's highly doubtful you could break anything by turning those knobs. At worst, you just end up with horrible clipping and distortion as you experienced. The IC-7300 is a direct-sampling SDR. It's possible you found some software bug. Or it could just be that the AGC wasn't on long enough to adjust the gain back down. Complicating matters is that ...


2

Splicing the wire is just fine electrically, but if you're using multistranded cable you probably won't want to solder it. Soldering makes a stiff section which concentrates the stress at the joint, leading to premature failure. Swaging is ideal, but if you don't have the necessary tool then rope clips are an acceptable alternative.


2

Ham radio is about experimenting, Wire antennas are relatively cheap to make. Go ahead and try it and see how well it works. I am not sating you should not read about various antennas and ask other people's opinions. You should, but at the end of day go ahead and try it. In my experience splicing wires should not be an issue. mechanically fasten the wire ...


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