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Everything posted by SteveShannon
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Best Antenna for repeater for large town in PA
SteveShannon replied to AlexM's question in Technical Discussion
It can be overwhelming; I don’t think anyone would dispute that. A high rise building like that should have a grounding system that you should tie into. Talk to the maintenance engineer if there is one. -
Best Antenna for repeater for large town in PA
SteveShannon replied to AlexM's question in Technical Discussion
See this thread: -
Best Antenna for repeater for large town in PA
SteveShannon replied to AlexM's question in Technical Discussion
There are literally books written about tower and antenna grounding. I’ll see if I can find you some links. The Bible is a document by Motorola named R56 something or other and there are lots of links to it on this forum. Be right back. -
Best Antenna for repeater for large town in PA
SteveShannon replied to AlexM's question in Technical Discussion
Regulations limit you to 50 watts, so it’ll have to do, but terrain and antenna height will determine range more than power. If you have the height 10 miles is well within reason. After all, those 5 watt handhelds have to reach you. I don’t own a repeater but I have seen a lot of posts recommending a Laird DB404 antenna. You will also want to minimize feed line losses by choosing the best feed line you can. Edited to add: Good reference post- -
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CTCSS tones: Why don't we hear them?
SteveShannon replied to Blaise's question in Technical Discussion
Filtering out just one tone is almost impossible. There’s always a certain width of frequencies that are also filtered out and it’s easiest to simply build a high pass filter rather than try to isolate a single frequency. Also, keep in mind that the bandwidth allowed for narrowband is only 6.25 KHz, so everything transmitted has to fit within that. For wideband it goes to 12.5 kHz, so no audio frequency higher than about that will be transmitted. -
This may be helpful in future situations. The ignore list includes very useful granularity. You can choose to ignore posts, messages, mentions, or signatures, individually.
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That’s what I was reacting to also, but I think it’s better to just let it go, at least that’s what I’m going to do. I can always put @MichaelLAXon my ignore list for awhile.
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National Net on the Last Sunday of Every Month
SteveShannon replied to rdunajewski's topic in National and Regional GMRS Nets
There are lots of nets, many weekly. Also, I believe there’s a YouTube recording of a MyGMRS net if you want to hear how they’re conducted. -
CTCSS tones: Why don't we hear them?
SteveShannon replied to Blaise's question in Technical Discussion
Yes, tones below 260 Hz are filtered out intentionally by radios designed to receive and decode them. If you listen with a radio receiver that has no such filtering the tones could be pretty annoying. Think of hearing the 60 Hz hum of a loose transformer as part of every message, or the sound of a mosquito or buzz of a bee. Here’s an aftermarket CTCSS filter: https://www.masterscommunications.com/products/filter/plf15.html -
You’re absolutely right. I should have ignored @MichaelLAX; it wasn’t my place to react. I have no excuse.
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CTCSS tones: Why don't we hear them?
SteveShannon replied to Blaise's question in Technical Discussion
The radio that receives them filters them out. -
Except that what you and @MichaelLAX refer to as Communism, really isn’t. What people commonly refer to as communism today is just militant socialism. In true or ideal communism (which exists absolutely nowhere as a functioning government) everyone contributes equally and shares equally and there is no state. But the point is that even if @Sab02r had an inaccurate signature, @MichaelLAX had no business taking him to task in a public post. If he was offended he could have written him a PM. Better yet he could have ignored the sig, or he could have turned off seeing that one sig (a function that I didn’t realize existed, but which is nice to have for this very reason). If we’re going to start criticizing each other’s signatures we’re in a race to the bottom. Better to just walk away.
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For the win!
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The last two of the frequencies you listed are not GMRS frequencies, but the first two are only 500 Hertz away from the interstitial center frequencies - it may be that your display just doesn’t show the fourth place. You might be picking up either interference or digital transmissions on those frequencies. Unfortunately I have heard that there are some low powered devices that have been imported, such as baby monitors, which use those FRS frequencies. From the regulations: The GMRS is allotted 30 channels - 16 main channels and 14 interstitial channels. GMRS stations may transmit on any of the channels as indicated below. (a)462 MHz main channels.Only mobile, hand-held portable, repeater, base and fixed stations may transmit on these 8 channels. The channel center frequencies are: 462.5500, 462.5750, 462.6000, 462.6250, 462.6500, 462.6750, 462.7000, and 462.7250 MHz. (b)462 MHz interstitial channels.Only mobile, hand-held portable and base stations may transmit on these 7 channels. The channel center frequencies are: 462.5625, 462.5875, 462.6125, 462.6375, 462.6625, 462.6875, and 462.7125 MHz. (c)467 MHz main channels.Only mobile, hand-held portable, control and fixed stations may transmit on these 8 channels. Mobile, hand-held portable and control stations may transmit on these channels only when communicating through a repeater station or making brief test transmissions in accordance with § 95.319(c). The channel center frequencies are: 467.5500, 467.5750, 467.6000, 467.6250, 467.6500, 467.6750, 467.7000, and 467.7250 MHz. (d)467 MHz interstitial channels.Only hand-held portable units may transmit on these 7 channels. The channel center frequencies are: 467.5625, 467.5875, 467.6125, 467.6375, 467.6625, 467.6875, and 467.7125 MHz.
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You shouldn’t let “one bad apple” ruin your enjoyment and if you enjoyed your sig, leave it.
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http://www.hamgadgets.com/ID-O-MATIC-IV but for GMRS it’s every 15 minutes while in use.
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National Net on the Last Sunday of Every Month
SteveShannon replied to rdunajewski's topic in National and Regional GMRS Nets
The basic checkin is your call-sign, first name, and city/town. So I just say WROM258, Steve, in Butte, Mt. -
Notarubicon did a recent video which showed pretty surprising results for a Ghost antenna.
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National Net on the Last Sunday of Every Month
SteveShannon replied to rdunajewski's topic in National and Regional GMRS Nets
Usually on a net you just listen until called on to check in. Sometimes it’s very difficult to get in to check in, but there’s almost always a bit of a lull. Once they build a list of checked in people they might go around again, asking for a report, which can include anything from weather to signal reports to type of radio and antenna you’re using. My advice is to listen until you feel comfortable. For me that sometimes takes a while. ? -
Yes, but when you begin arguing the accuracy of another member’s signature line instead of simply ignoring it, it spoils enjoyment for many more than just you. Or is it all about you?
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How are their extendable masts?
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Rohm makes wall mount mast brackets that extend out to 24 inches from the wall. https://www.dxengineering.com/search/part-type/mast-wall-brackets They should work on either sidewall or gable ends. They also make an eave mount bracket that appears on the same page: Hy-Gain EVE-48 Eave Mount Brackets EVE48
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Let us know how it works out, please.