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Everything posted by axorlov
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It will work. The most important pins are in the center: ground, ptt, mic ground, mic signal
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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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ISS Satellite Contact a Few Minutes Ago. Advice?
axorlov replied to marcspaz's topic in Amateur Radio (Ham)
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? -
PO boxes cost non-trivial amount per month where I live. This is why I have my real address on my FRN. Any wacko can come and meet their match! We will see who is the wackiest.
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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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I agree. And I know of one person not getting GMRS license and staying pirate because of that.
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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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Programing PL tones into Kenwood TK-880
axorlov replied to Flameout's question in Technical Discussion
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: -
Programing PL tones into Kenwood TK-880
axorlov replied to Flameout's question in Technical Discussion
So, the scan function works, but the SCN button does not? Assign Monitoring to SCN and Scanning to MON to verify. -
Help with External Antenna and Cable.
axorlov replied to MozartMan's question in Technical Discussion
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. -
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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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!
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That's what I'm thinking too. The frequency of this repeater will be an answer.
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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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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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GMRS channel plus CTCSS or DSC tone a new real channel?
axorlov replied to mitzvah's topic in General Discussion
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. -
GMRS channel plus CTCSS or DSC tone a new real channel?
axorlov replied to mitzvah's topic in General Discussion
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. -
GMRS channel plus CTCSS or DSC tone a new real channel?
axorlov replied to mitzvah's topic in General Discussion
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. -
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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Handheld with a PL-259 dummy load still transmits 10+ yards
axorlov replied to WRQV528's question in Technical Discussion
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. -
Handheld with a PL-259 dummy load still transmits 10+ yards
axorlov replied to WRQV528's question in Technical Discussion
Radiator is a body of your buyao-feng + adapter + dummy load. The whole contraption together radiates just fine. Your dummy load is ok.