axorlov
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Posts posted by axorlov
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Yes, with police, sheriff, fire, etc moving to P25 Phase II, the good scanners of old became mostly useless. Where I live it is only jail still on analog FM, and it is going to join the rest of the agencies on P25 real soon. California Highway Patrol, however, is still on their 40MHz FM system statewide, and likely will stay like that for foreseeable future.
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My only experience with ISS was to use their APRS digipeater, and I do not have any other experience with satellites. I've been told or read somewhere, that Doppler effect on VHF is small for LEO sats, and you should not need to adjust the VHF frequency. As opposed to UHF, where people normally program 5 adjacent frequencies and go through them during the satellite pass. Is my impression right or wrong?
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1 hour ago, Newb said:
RISK programming is getting better all the time with the new generations of young programmers and their new ways of thinking
Yeah, sure. Your RISKs are higher as you put more trust into the new generation of young programmers capability and way of thinking. (see what I did here, as a retired insurance professional?)
That was a joke, of course. You clearly meant RISC (reduced instruction set computing). For new generation it is mostly very-high level programming, like C#, Java, Python. I know because I interview them often. I ask question about <genuine problem> to see how they think, and answer 90% of time is "I will google and find Python module to do so". Given 30 minutes to google they come dry because it is a <real problem>, they usually pack and go to never be seen again. With the rest 10%, who attempt to actually think, we often can develop a productive collaboration.
Arduino is not a match for Pi or similar boards (beaglebone, jetson, khadas, etc) for the same reason you do not drive golf cart on a freeway.
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Programming cable from bluemax49s has USB-to-serial chip inside. If you want to save on cable, you need build serial cable and connect it to serial port on your PC.
And a quick search on the internet shows MAX232 IC to bring Icom signal levels to RS232, so you probably will not be saving anything, vs buying FTDI USB cable.
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1 hour ago, Flameout said:
I ended up getting Scan to work. I just needed to put a check in "Off Hook Scan"
Ha! I remember that now. That was years ago, I forgot the details. Glad to hear everything works.
Here is the thread where we discussed 880 and some other Kenwood old iron (and there were more threads here). Might be of interest to you:
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1 hour ago, Flameout said:
But if I assign something other that 'Scan' to it, it works
So, the scan function works, but the SCN button does not? Assign Monitoring to SCN and Scanning to MON to verify.
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4 hours ago, MozartMan said:
1. Is this Tram Browning external antenna a good antenna for GMRS?
2. Can I re-use this DTV coax cable, or do I need to buy different one?
3. If I need to buy new cable, can anybody recommend which one to buy.
1. Yes
2. You cannot reuse TV cable if you plan to transmit.
3. As pointed above, LMR-400 is a minimum because of the loss on 462MHz. As pointed above, LMR-400 is much easier to work on, and connectors are abundant on Amazon and ebay. However, you can have an outside, more or less straight run, with hardline, and inside between the walls, with LMR-400. Make sure you use N connectors, they are waterproof and work well on 462MHz, unlike the UHF connector. DX Engineering sells DXE-400MAX cable that is very close in performance to LMR-400 and has stranded central conductor, making this cable easier to work with than a genuine LMR-400. LMR-400 connectors fit. It has a tiny bit more loss than a proper LMR-400.
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9 hours ago, WRPC505 said:
cut out a lot of hams that gave their time and efforts to the ARRL only to get screwed over by new rules and requirements that the Feds requested, which left many hams out in the cold
Can you elaborate on these new rules, give some examples? It is a sincere question, not to start a flamewar or anything. I got my ham callsign in US only in 2015, but had it on another continent before. I clearly missed changes that happened after 9/11, I presume?
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20 minutes ago, mitzvah said:
My mobile is a 20 watt Ocean and a today I had a Ocean 905G with a adapter to a Nagoya GMRS tunes antenna. The repeaters that I try to hit each outing are MT Disappointment ( 462.600 ) , MT Harvard ( 462.625 ) , 725 Round Table ( 462.725 ) , Mt Wilson (462.600 ) mostly blocked by mountains if near home. VNC575 ( 462.575 ) hit this repeater today! I think part of my problem is that I'm to close to the base of the mountains.
Do you happen to remember which of these repeaters you've been yelled at by an angry fireman? Was it Mt Disappointment (what an awesome name!), Mt Harvard, Round Table or Mt Wilson? Maybe it was VNC675 that you hit today? Maybe totally other repeater? Would it be too much trouble to look into what you have programmed in your Ocean (Woksun-Oksan, how Queen-Prophet likes to say)?
It is possible that your problem being too close to the base of the mountains, among other possible problems, but the fireman is a different problem. He heard you and you heard him.
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Repeater is clearly on the air, the angry fireman and such. Per map or not, tell us the freq that you still have in your UV5R. Just like your nickname implies, do the godly thing, mitzvah! Do a right thing, help others do not step into that blind!
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Dude!Dear lady! Drop this GMRS habit and stay away from ham license if your health and sanity have any value to you and yours. Hams attract waves just like lightning rods attract garden flies. Take care of yourself and your family! Health is first! Maintain the purity of bodily liquids, for God's sake! -
34 minutes ago, wayoverthere said:
was actually a fireman
That's what I'm thinking too. The frequency of this repeater will be an answer.
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2 hours ago, mitzvah said:
And got a rather upset fireman screaming that the repeater was only for fireman
Out of curiosity, what frequency did you program for this repeater?
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After giving it some thought (but without doing any research into Icom mics), this 8V 10mA on pin 1 is a strong hint that Icom mic is a condenser type. So, it will not be possible to just connect pings 4,5, and 6 and expect the mic will work. More complex solution is needed. Or more simple: Kenwood mic from ebay.
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It appears that pins 4, 5 and 6 have the same function. Kenwood expects dynamic mic, though. If Icom mic is dynamic, they should be compatible. You still will need an adapter to isolate the rest of the pins.
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37 minutes ago, KAF6045 said:
You would need to configure the router (the one supplying the device you are trying to connect to, not the one at your end) to accept incoming requests and route them to one of the internal devices (being able to connect to multiple internal devices is much trickier -- many routers can designate a handler device for unsolicited inbound traffic). You would then need to connect to the IP# of the router.
That is the correct answer ^^^. However, you are opening your Pi for the great world of the outside, so configure your router and SSH accordingly, or you're risking your Pi will be joining russian botnet quick. If you are new to Linux, read up and make sure you understand how to configure SSH with self-signed certificates, this is harder to crack than user:password pair. But if password a must, then of course, it must be a strong password, 16 characters at least, no quotes from movies or literature. Three or four random words sprinkled with random numbers probably would be fine. And absolutely disable root login altogether. For dynamic DNS I use https://freedns.afraid.org Their minimalistic free service works fine for my needs.
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1 hour ago, WRQV528 said:
<..>
Noble effort, but wasted. People who posses the skill of reading would already know this. On the other hand, congregation of the Church of NotaRoundhead will seek guidance and solace in the video sermon of the Queen-Prophet, conveniently linked above by MichaelLAX.
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I was simply explaining what "channel" means in the context where there are 128 of them. Unlimited opportunities!
But Michael covered it earlier, no new frequencies and no privacy, of course.
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Programmable slot - would be a better name. The RX and TX frequencies and the RX and TX tones. You may have different repeaters on the same 462.650 MHz (on the same channel) with a different TX and RX tones. You can program them into different slots, assigning different names.
Or, you may use the same 462.650 MHz with 110.9 tone to talk to your wife, and the same 462.650 MHz with tone 88.5 to talk to your girlfriend. You can program them into different programmable slots and assign different names.
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1 hour ago, TNRonin said:
I need a GMRS antenna
If strictly for GMRS, no ham, no MURS, no nothing and being a unity gain, I would recommend Tram Browning BR-6140. It is short, has a choke, comes with mounting hardware, N connector and is foolproof. It gave me years of service without any problem. Plug and Play in a best sense of the word, perfect SWR. It is sold everywhere and will be cheaper than Ed Fong antenna after you figure in choke and mounting hardware. If you want 2m, or 70cm, or MURS in addition to GMRS, or you want gain antenna, then look at theantennafarm.com. I personally have good results with Diamond X50, which is a ham antenna for 2m/70cm, but has acceptable SWR on GMRS (tad below 2). Some people here have good experience with Diamond X200 and X300.
There are also more expensive, more reliable antennas used for repeater service, remote locations, hurricane winds, snow blizzards, etc.
And, btw, BR-6140 works on 70cm too with SWR around 1.7. If you need 70cm.
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27 minutes ago, WRQV528 said:
Huh. I thought one of the purposes of a dummy load was to prevent interference, especially at that far of a distance. Is there a device that accomplishes this?
Yes, it's called Faraday Cage.
It is very difficult to fully prevent cables, body of the radio, grounding wires, your body, from radiating. The higher the frequency the harder the task. On UHF it is usually solved with a massive (and expensive) common mode current choke on the cable.
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Radiator is a body of your buyao-feng + adapter + dummy load. The whole contraption together radiates just fine. Your dummy load is ok.
6 pin vs 8 pin on a microphone
in Technical Discussion
Posted
It will work. The most important pins are in the center: ground, ptt, mic ground, mic signal