axorlov
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Posts posted by axorlov
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1 hour ago, AdmiralCochrane said:
Apparently the ChatGTP creators endowed it with bias. How else do you explain when it answers with bogus results.
Explanation is clear. ChatGPT was never born out of woman's womb. It never was raised by a human family, acquiring a life experience as it grows. It never was sitting next to its grampa on a couch begging money for an ice cream when 6yo. It never went to school, never worked in a fast food joint or coffee shop, never volunteered for cleaning local creek or cleaning local streets. It was never a member of a local gang either. It never was a hand to an experienced machinist or chef or painter, a creator of things to use or admire by others. It was never bitten by mosquitos in the warm night, never slept in a flooded tent in a cold night, never had a perfect morning (or afternoon) lying next to someone. Never lost a significant one to anything, and never even had a significant one.
It's Large Language Model is trained on the internet, on the post like yours, mine, and from a certain someone. What else can one possibly expect?
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1 hour ago, Tiercel said:
I cannot even visualize using a ham transceiver for emails, video, file transfer, GPS???
Emails: Yes, look up Winlink.
File transfer: Yes, via aforementioned Winlink. There are other ways much less robust and reliable. On HF is limited by 300 baud by government decree. Much faster on VHF/UHF.
GPS: Yes, there is a system called APRS, allowing tracking, weather reports and short message exchange. It even allows text exchange between cell phone and APRS-enabled radio. Not very reliable, but works. Depends on the infrastructure: the whole bunch of things called "digipeaters". They are deployed in populated areas, where you normally have cell connection. However, where I live, we often have digipeaters available where there is no cell service. I'm an active user of APRS, but it has it's serious limitations.
Video: It is not going to be 1080p x 60fps because there are some laws of physics that limit the bandwidth. Look up Slow Scan TV. Resolution is ridiculous, frame rate is laughable. But yes. -
12 hours ago, WRQC527 said:
Why would people think spurious emissions from a UHF amplifier are dangerous? Is there some kind of data that would support such a conclusion? A study? Just curious. I don't want to key my Baofeng and bring down an Airbus or something.
Spurious emissions are like farting on the airplane: benign to you but a discomfort for the neighbors. Studies aren't needed. Keying your Baofeng will not bring Airbus or Boeing or Embraer down, it will simply stink up the joint.
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Gortex actually pointed out important consideration: chargers must be isolated from the ground and from each other. Is it worth the hassle? Another consideration: lead-acid batteries are charged with 13.5-13.8V, your load will see about 54-56V instead of 48V when chargers are ON.
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How the batteries connected is not a series connection, it is an explosion device. Where "48VDC" is written will in fact show 12V for a very brief period. Every battery is shorted via the other battery in the pair, current will be high and will destroy the batteries in a matter of seconds.
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4 hours ago, jsneezy said:
Except they have. I couldn't tell you how many times I was on CB in the 90's hearing guys saying "I'll pull up next to him with my 1000 watt linear amp, key the mic, and blow his radio" every time a couple guys would start bickering over something stupid. It's not something brand new.
I'm talking about different thing. The 'certain person' claims that there is a group of experts in present day that keep telling us that keying up transmitter with no antenna attached will immediately blow the finals. The statement from a 'certain person' is a deliberate lie. There is no such group in present day, there is no such claim (immediately blown up finals) being made neither on a regular basis nor sporadically.
I explained how to prove me wrong, should be simple for a 'certain person'.
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My posts get yanked, and my sage, wise and humorous (is it a dry humor? other kind of humor?) input is now pre-moderated. So I have to be polite, civil, boring, to the point and nice.
13 hours ago, OffRoaderX said:But that is exactly what all the online "experts" keep telling us.
The statement above is a deliberate and blatant lie. No one ever said anything close to that.
If anyone wants to prove me wrong, the Search button is working and there is more than 10 years of history on this forum, go!
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The emissions around 450-470 MHz will directly mess with the receiver (if talking about GMRS). They will be making Signal-to-Noise ratio worse. The higher frequency emissions, when strong enough, may have an effect on internal electronics of the radio. The lower frequency emissions unlikely to cause problems, but there are cases when they have an effect because close enough to intermediate frequency or any harmonic of it. Radios are constructed to be protected from the off-band interference, but if signal is strong enough, or/and radio is cheap enough, you will have an adverse effect. Biggest problem is always the in-band interference, 450-470 MHz for the GMRS.
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The so-called "privacy channels" are just CTCSS/DCS tones being transmitted. Tune to the frequency (channel 7), remove all tones on receive, and you will hear everything being transmitted on this channel. There is no privacy in "privacy tones".
In order to transmit with the correct tone, to be heard on this "7.11 channel", you need to find out what CTCSS or DCS tone is used by this FRS radio. Find out what tone corresponds to ".11". The mapping table should be somewhere in the manual for the FRS radio.
And the term sideband has a meaning that has nothing to do with tones or channels. It's not applicable to the situation we are talking about.
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52 minutes ago, Sshannon said:
What’s the backup plan for people in Seattle, Detroit, etc?
NotaSingleclue troopers do not care.
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SMD components are fine. I used to be able to solder them without any aids, just with my sharp eye and a steady hand. Basically, the same things and skills you use on ladies to get a score. But now, in my advancing age, I need a good loupe or microscope, and have to rest my elbow on a sturdy surface. Works for me for now, both with PCBs and ladies.
Surface mounts are not what is holding the youth to join. If anything is holding them.
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9 hours ago, Sshannon said:
They could have been on GMRS or FRS. Except during an emergency, they have as much right to be on the channel as your CERT Net. We share the repeater receive frequencies with simplex users of both GMRS and FRS radios and while it would be ideal for each of us to listen with squelch turned off to hear if a frequency is in use before transmitting, there is no GMRS training that covers that.
Repeater users rarely can hear local traffic on simplex. Only when simplex stations are close to the said repeater user. That kind of interference from the repeater is a fact of life and unavoidable. Move to another freq if you are on simplex.
- AdmiralCochrane and WRXB215
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Looks good! Yaesu, or clone? Wiring to factory speakers is great, aux underseat speakers don't do much. And I also like your manual gearbox, not many people these days "row their own".
- WRUU653 and wayoverthere
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462.xxx5 (channels 1-7) are repeater-free. Perfectly adequate for local traffic between HTs or between HT and mobile. Local traffic between mobiles on 462.xxx0 at full power has a good chance to overpower repeater interference. The opposite happens only when mobiles are far and repeater is close. In this case use reserve frequency, according to your communication plan.
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15 minutes ago, flashover52 said:
Interesting technology even for one who uses Winlink & APRS a bit.
Yes, AX25 packet over AFSK does not use any(!!!) error correction, so it is much-much less reliable than voice in the same environment. Ribbit guys thought of it, and it's impressive that data survives the audio coupling + over-the-air noise. It would be interesting to compare the bandwith of Ribbit and AFSK under real life conditions.
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1 hour ago, jsneezy said:
Does the NMO require an electrical connection to the vehicle ground through the mount, or is the ground through the cable to the radio sufficient? Every time I've tried googling the question, all I seem to come across is a bunch of answers about ground plane, which is obviously different.
NMO mount itself does not require electrical connection, obviously. Drill the hole in plastic, tighten the nut, done! You are not going to fry the transmitter if SWR is acceptable.
But detailed answer about your install will delve into ground plane. Depends on antenna you're going to use. 1/2 wave does not need ground plane. 5/8 wave does need ground plane but works acceptably without one. 1/4 wave may work without ground plane, depending on the shape and size of your counterpoise. And when I say "ground plane" I use textbook definition: conductive surface more that 1 wavelength in diameter (plane, see it?), perpendicular to the antenna. More info here: https://en.wikipedia.org/wiki/Ground_plane
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I used Argent Data SR-1 for many years with great results. Even without high mast, just plugged into a mobile radio with 5/8 antenna on a flat roof of SUV it extends the range of HTs by many-folds. I have it programmed to only repeat when DTMF "0" is sent, to keep annoyance factor to minimum. There are several threads here where we discussed simplex repeaters.
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Cool, I did not know the non-nuke EMP weapons exist, and I did not know it is not a novel concept. Took me some reading to grasp the clever tech behind it.
Still, the area of damage of non-nuke EMP is tiny small, and this is the treat I refuse to account for. Life is too damn short for things like that. On the other hand, nuke EMP is a different thing, and should not be treated as a separate from full-on nuclear strike.
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This paper mentions 1.4 MT nuke in the first part, as a practical tested example, and later mentions "EMP weapon in a briefcase". 1.4 MT charge is a lot larger than a briefcase. If any actor detonates 1.4 MT over Kansas at altitude of 250 miles, I'm not going to worry about my radios or electronics. In that case, I'm sure I will be issued M4 or any sibling of it, and whatever else is needed to support the mission, be it radios or semaphore flags.
For solar events, we likely will have an advance warning. I know, it's only 8 minutes for light to get from Sun to our miserable planet, but coronal bursts take days to cover the distance. I already have enough of kitchen foil to wrap all the radios, computers, phones, playstation, etc. Kitchen foil makes an awesome Faraday cage.
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There is a chance that firmware in the radio is ether LTR firmware or Sholer Johnson Passport firmware. If first case, you should be able to run Fpro utility (flash programming) from the KPG-49D suite to flash a genuine Kenwood firmware and make the radio compatible with PG-49D. In the second case situation is more complex, since you'd need a WinSJI software to enable the reflash of the firmware.
But start with first things first.
1. Make sure your power adapter is capable of at least 8A at 12V. Normally, you'd need less, but that's the spec.
2. Make sure there is no misconfiguration of your USB-to-serial adapter. Keep experimenting with COM speed, trying to read from the radio.
3. Try to press SCN button and power on the radio to see if it greets you with PROG 56700 on the panel. In that case you can reflash the firmware.
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Youtube peddler of chinese junk worried about his monetization. How novel.
Loctite?
in Technical Discussion
Posted
I wouldn't put loctite. What kind of vibrations do you plan to experience here? Just screw it snug, Al oxide film will be destroyed by tightening it up.