SteveShannon

This has nothing to do with privacy. When two FM signals are in proximity and use the same frequency, regardless of any tones, they can interfere with each other. FM also has what’s called a “capture effect”. Your radio will lock onto the stronger of the two signals. Again, “privacy tones” have nothing whatsoever to do with this.

Are you always parked in the same place when you use your radio? If so, try somewhere else.

If it’s there when your engine is off it’s impossible to be the alternator.

Yes, or simply transmit a constant signal from the antenna and move a field strength detector around it. Most antennas don’t have a complete null above and below. That’s characteristic of a high gain antenna. In fact, multiple lobes like you see in that chart are characteristic of high gain antennas. If you look at the charts for a low gain antenna, such as a vertical dipole you’ll see two graphs, one from the side and one from above. The graph from above (called azimuth in this image) looks like a fairly smooth circle, showing that the signal strength is approximately even in all directions. Taken from the side (elevation) the signal strength of a dipole looks like a squashed figure eight. The three dimensional colored image helps understand that the squashed figure eight is swept or rotated around the z axis. The vertical dipole forms the z axis. By the way, while looking for these images I found this description on how to understand antenna graphs. I haven’t read it yet, but it appears to explain a lot of different aspects. https://gristleking.com/all-about-antennas-radiation-patterns/comment-page-1/

I use a Samlex SEC-1235P-M: https://www.gigaparts.com/samlex-30-amp-switching-power-supply-sec-1235p-m.html?utm_term=sku-zsx-sec-1235p-m&gad_source=1&gbraid=0AAAAAD_py5G3Q-Q2eOlI8fLnlgFs9AnfE&gclid=Cj0KCQjwgL-3BhDnARIsAL6KZ68TS4vz1CjA9wsIyptiCwjRbU8ypB2GThTm6P2B9wP3CRI0OUKR-d4aArG-EALw_wcB 13.8 volts at whatever current the radio plus other accessories plugged into a powerpole distribution panel require at the time (up to 30 A continuous). It’s small and lightweight. When my ham radio is set to 100 watts the power supply current meter shows 23 amps. It has a fan that comes on sometimes that is louder than I would like (any fan would be) but that’s a minor whine.

Does the whine still occur when the engine is shut off? If so then it isn’t the alternator. Does the whine change as the engine rpm is changed? If not, it might not be the alternator. Vehicles have other sources of RFI. Do you have LED or some kind of high energy lights, especially aftermarket ones? They have been known to cause interference. Ferrite chokes can be applied in a couple different ways. There are clamshell chokes that can be snapped around your power cable right where it enters the radio. Or a person can loop their power cable through a toroid.

I guess I don’t understand why OFFSET doesn’t say 5.00000. 467.70000 MHz is your transmit frequency which is calculated when the offset frequency is added to the frequency in the first column. Under duplex it should have a plus sign ‘+’. The line for Bothell is a good example. The way you had it in the earlier configuration (with cross mode) as suggested by wrxp381 really should have worked. Switching to Tone rather than CROSS simply disables Tone Squelch on your radio so you hear everything on 462.700 MHz. It’s a way to troubleshoot, but it does leave you subject to receiving transmissions from other radios. Once you’re certain you have the repeater input tone correct you might want to go back to Cross mode and add the correct Squelch tone. If you still don’t receive anything, try going closer. If that doesn’t work then try changing your tone to 114.8 Hz in case the owner put the input tone into the output field on the repeater info page.

Sure! And trust me on this, I’m no expert on reading this either! You’re exactly right, this shows gain, (no relationship to the distance the signal might carry!) with the outermost ring being the reference based on the maximum signal strength. That’s all it means. We all look at these and wonder what they have to do with distance, but that the way to torture yourself. Just so I can look at it easily while talking about it: Those lobes are actually what has either been simulated or measured. Whoever put this together found the direction of max gain and measured the strength of the signal in that direction. Then, in other directions they measure the signal strength and compare the max against the strength in that direction to determine how many dB down the signal is in any other direction. The blue lines showing the lobes simply indicates the loss of signal strength with the smallest lobes showing greater loss. So, for instance, there’s a lobe nearly centered on the 60° angle. The intersection of the outermost extreme of the lobe falls between the -10 dB and -20 dB circles, but I would estimate between -16 and -17 dB. So that simply tells us that at that angle, the measurement of signal strength was about 16 or 17 dB weaker than the maximum signal. Note that directly above and below (0° and 180°) there is no blue. That means there’s a point above and below where there was no signal, a null reading on the field strength meter. That null actually appears to subtend an angle about 10° right and left of vertical. That’s why placing a repeater on your roof and trying to hit it with another radio that happens to be within that “cone of silence” could be really frustrating. You’re within eyesight of the antenna, looking straight up at it, but you’re in a dead spot. Jist as a comment, the lobes are not symmetrical with respect to the horizontal axis. That’s probably because of the proximity to the ground. As you move the antenna up, the lobes below the horizontal axis will become more and more like the upper ones. Sometimes, whe people want to have their signals go skyward, they actually lower their antennas. I’ve got to go to bed, but I’ll check in the morning to see if I made things worse.

Set tone mode to Tone. Don’t worry about the repeater output tone (which is your radio’s input tone. In Tone mode it doesn’t matter; all transmissions are reproduced. So then all you need to set is the tone you send to the repeater, 218.1 Hz (not MHz!!!!) Put that in the Tone column. Here’s something else: For a repeater be sure you have a 5.000 MHz offset and that a plus sign appears in the Duplex column. Repeaters are duplex. I only mention it because the highlighted line above isn’t set that way.

Playing devils advocate here, why should there be an exception to talk to the opposite side of the mountain? That’s usually no longer local. Of course the real solution is to put a single repeater on top of the mountain.

I think you missed what he was asking. He wanted another level of alerting so that his radio doesn’t simply break squelch whenever the repeater is active, but so his radio will be silent until two things occur: The repeater sends the correct “privacy” tone, and Whoever is trying to reach him embeds a pattern of tones (DTMF, or 2-tone or 5-tone) that matches his specific alert tone.

On the porch roof? Is it sloped down away from the repeater by any chance? Is there a higher elevation roof?

Be sure to check the boxes to display repeaters which are either outdated or offline. If a repeater owner doesn’t log in and touch the data annually (I think) it’s marked as outdated.

Yeah, those are heavy duty tig welded aluminum and capable of withstanding a lot. The one on our 2 meter repeater is a Comprod? https://store.trustclarity.com/Comprod-874F-70HDWTM-Heavy-Duty-4-Dipole-Array-for-138-174-MHz-Top-Mount/dp/pId=422212465103940?gad_source=1&gbraid=0AAAAACbFVBrehveY9E-VtwdZkWeYVUs95&gclid=CjwKCAjwl6-3BhBWEiwApN6_kqakg3AdIOXY28uYJNwcnVCETlz3y9MNX0vw8leXnzZJTJfkw1CYthoC4fsQAvD_BwE

Well, we know for a fact that the pagers were triggered remotely and simultaneously in a group. Many of the Hezbollah affected were looking at the display when the explosives were detonated. I would assume that then the order went out to get rid of any unexploded pagers and use the walkie-talkies they bought five months ago. Then, while the people were at the funerals of the people killed by pagers the previous day, the walkie-talkies were detonated. It's a radio. It has an alert circuit and the capability of being upgraded to an addressable digital radio, so it's not a difficult leap, whereas a simple timer has one too many downsides: it cannot be stopped once it has been started.

I believe that it was the battery as well; I just consider that part of the radio as a whole. The radios shown in the news photos were Icom ic-v82 which was discontinued by icom nearly a decade ago but they were delivered about five months ago according to the news. There are manufacturers of aftermarket batteries so the opportunity for embedded explosives exists. Also, this particular radio has a feature whereby sending a code can alert the user. Finally, the ic-v82 has the ability to be updated to DStar, which makes it addressable either individually or in groups. I have no idea whether the digital upgrade was installed or what is necessary to perform the upgrade.

The radios that exploded in Hezbollah’s hands had been doctored with a high explosive compound called petn. This wasn’t a case of lithium batteries failing.

The simplest solution is to purchase a product like the Retevis RT-97s or the very similar Midland repeater. The Retevis is even available in an all-in-one kit with antenna and cable. you can buy it, put the antenna up, screw the cable to the antenna and the radio, connect power, and be up and operating within a very short time. Messing around with two radios connected as a repeater can be done and is an inexpensive way to get more power, but requires more support, plus the KG1000g has been shown to have issues with desense when used that way unless you find a way to isolate the two radios from each other. Notarubicon has a series of videos showing him setting up a repeater using the KG1000g. If you do decide to go the separate radio route my suggestion would be to go to a nearby ham radio club and ask for assistance. Someone there will have the experience and the willingness to help you.

What do you mean by “better”? Why would you want a repeater instead of simply a base station with an antenna on the roof?

Max is 9.78 dB (assuming dBi) at theta = 90°, horizontal. That’s the blue horizontal line to the right, and it’s 9.77 dB along the green horizontal line to the left (theta = -90°). The red lines are about angles above and below horizontal. Theta is the angle along the circle. So at theta = 84° (which is the upper red line in the diagram) the gain is 5.74 dB. That’s 6° above horizontal. At theta = 95° (the lower red line) the gain is 6.77 dB. Everywhere within the 11° angle between theta = 84° to theta = 95° has gain greater than 5.74 up to 9.78 and back down to 6.77.

That looks right and the IC-V82 has the option of being converted to digital which would make it addressable.

Yes, a high gain antenna sacrifices up and down while enhancing horizontal. The antenna we use for our 2 meter repeater is a vertical array that uses phasing to tilt the gain downward like a shallow cone.

Glad I have Yaesus.

The picture on CBS nightly news was of pieces but along the top it said VHF radio

If you like the KG-905G, why not go for the very similar mobile radio, KG-1000G Plus? https://www.buytwowayradios.com/wouxun-kg-1000g-plus.html?matchtype=e&keyword=wouxun kg 1000g plus&device=c&adposition=&network=g&gad_source=1&gclid=Cj0KCQjw9Km3BhDjARIsAGUb4nyeVD_7vY7JbkTyrL0bOLmAsSJt8TEKNsQVoN96mQeTHgcCsM7yG2EaAjqGEALw_wcB