32 votes
Accepted

Why does the audio on my FM transceiver cut out every 5.5 seconds?

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 ...
webmarc's user avatar
  • 4,105
8 votes

Identify Icom portable radio

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 ...
K7PEH's user avatar
  • 2,998
8 votes

Can the IC-7300 be connected straight to a computer and use WSJT-X for FT8?

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 ...
AndrejaKo's user avatar
  • 2,893
7 votes

What is a 'Call' Channel?

From the radio device perspective, a call channel is not that different from a regular memory channel, except it doesn't have a number, there's usually one per band, and typically you can get to it ...
user10489's user avatar
  • 6,230
6 votes
Accepted

Is the ground on the back of the Icom IC-7300 an electrical or RF ground?

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 ...
tomnexus's user avatar
  • 11.1k
5 votes

Can an oscilloscope be used as an RF voltmeter?

One of the functions of an oscilloscope is actually to measure RF volts, just make sure to use the x 10 function to minimize loading on the circuit you are measuring, and keep in mind that some high ...
Andrew's user avatar
  • 3,685
4 votes
Accepted

Recording from ICOM R8500 to pc

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 ...
Kevin Reid AG6YO's user avatar
  • 24.5k
4 votes

Why are the lower HF frequencies not working during winter day time?

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 ...
Phil Frost - W8II's user avatar
4 votes

What kind of power plug does the ICOM IC-7300 need?

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.
Glenn W9IQ's user avatar
  • 18.6k
4 votes

Using two antennas with IC751A — one for transmitting and another for reception

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: ...
Juancho's user avatar
  • 1,154
4 votes
Accepted

What is the 1750Hz tone burst for?

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 ...
Glenn W9IQ's user avatar
  • 18.6k
3 votes
Accepted

Does the Kenwood TH-D74 support Access Point and Terminal mode for D-Star?

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, ...
Glenn W9IQ's user avatar
  • 18.6k
3 votes
Accepted

Receiving commercial / public-safety on a general-coverage HAM transceiver

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.
rclocher3's user avatar
  • 9,192
3 votes

What's the difference between the normal and S-meter squelch in IC-2730?

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 ...
Tony's user avatar
  • 31
3 votes
Accepted

Is it possible to receive weather satellites with a ham radio rig? (Icom 910)

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,...
Phil Frost - W8II's user avatar
3 votes
Accepted

Can I splice a random wire antenna?

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 ...
rclocher3's user avatar
  • 9,192
3 votes

Can an oscilloscope be used as an RF voltmeter?

Maybe. If measuring a circuit output that expects a load impedance, such as a 50 Ohm coax or antenna, then to measure the RF voltage at that point with an oscilloscope, you should terminate that ...
hotpaw2's user avatar
  • 13.3k
2 votes

Remote wake up of Icom IC-706Mk2g

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 ...
K7PEH's user avatar
  • 2,998
2 votes

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

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: ...
Hugh Wardlaw's user avatar
2 votes

Issue with Icom R-71A

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 ...
PeterH's user avatar
  • 311
2 votes
Accepted

Using the VHF port for 6m on an Icom IC-706mkIIg transceiver

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 ...
Kevin Reid AG6YO's user avatar
  • 24.5k
2 votes

GNU Radio BPSK reception from ICOM SSB audio

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 ...
Phil Frost - W8II's user avatar
2 votes

Any ideas why my phone is not connecting to my Icom ID-51E PLUS2?

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 ...
Edwin van Mierlo's user avatar
2 votes

Is the ground on the back of the Icom IC-7300 an electrical or RF ground?

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 ...
Phil Frost - W8II's user avatar
2 votes

What did I just do to my rig? Audio went crazy and had to reboot

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. ...
Phil Frost - W8II's user avatar
2 votes
Accepted

How do I link a repeater on one of the DCS reflectors using IC-9700?

As of firmware version 1.06, it seems that there is no way to use the actual Link to Reflector feature to link to non-REF or non-XRF reflectors. However, the Link to Reflector option need not be used ...
AndrejaKo's user avatar
  • 2,893
2 votes

Can I splice a random wire antenna?

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, ...
Phil Frost - W8II's user avatar
2 votes

Can I splice a random wire antenna?

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 ...
Jim's user avatar
  • 1,688
2 votes

How to check second-hand ICOM IC-718?

If you have or can borrow a 100W dummy load and a wattmeter, you might want to check to see if the rig can transmit at its full rated power over the range of bands of interest, and without obvious ...
hotpaw2's user avatar
  • 13.3k

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