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VE3MAL

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Baud rate replaced by bandwidth limit (www.radioworld.com)

Bands with a 300 baud rate limitation eliminated by this order are the 160 meter band; 80 meter band; 40 meter band segments 7.000–7.100 MHz and 7.100–7.125 MHz; 30 meter band; 20 meter band segment 14.00–14.15 MHz; 17 meter band segment 18.068–18.110 MHz; 15 meter band segment 21.0–21.2 MHz; and 12 meter band segment...

VE3MAL ,
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Bandwidth doesn’t put a hard limit on bitrate either. It’s one variable, but there’s also SNR (See Shannon). With a fixed bandwidth, you can have low bitrate and excellent low-SNR performance (think of Olivia), or you can have higher bitrates, and require stronger signals. For practical purposes though, you are not going to get highspeed internet on HF. But that’s what sharing is like. 🤷‍♂️

VE3MAL ,
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On HF, unfortunately, physics is going to keep you from having high speed data. The Shannon–Hartley theorem puts a ceiling on the maximum bitrate of a channel in the presence of noise. If you are on HF with your 100w transceiver and a dipole antenna, your signals are always going to be weak enough on the other end of a skywave contact to limit your data throughput. Even given a magical ham prodigy that invents the best mode imaginable, it’s going to be Kbps, not Mbps. If you want to learn about the development of open source, higher throughput digital modes for HF, I highly recommend David Rowe’s blog on the development of FreeDV over the years. There’s even a recent move to general data in addition to digital voice. However, we are talking about single digit Kbps digital. There are some other modems used by the Winlink folk that are a little higher. The drop of the baudrate limit will just remove an artificial contraint, and headache, on that development.

On line-of-sight VHF and up connections, it gets easier and easier as you have higher gain antennas pointed at each other and lower natural noise figures.

How to build/mount horizontal dipole antennas between two houses?

It’s been too many years since the last time I thought about building antennas, so i’m a bit rusted: I think about installing a nylon cord between my house and my neighbours house (some 40 or 50 meters away) to put a dipole on the cord. Before I start calculating, what lambda fraction for which band I can get with that...

VE3MAL ,
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50 meters is enough for a 80m 1/2w dipole. And yes, google a “fan dipole” - you can hang multiple dipoles below each other with as little as a few inches of separation. However, the dipoles interact with each other, and getting it right gets more troublesome the more you do.

VE3MAL ,
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Neat idea. Odd that those diagonal telescoping rods don’t interfere with the yagi pattern?

VE3MAL ,
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It mirrored the contemporary idea of the “End of History”, where all the existational crises were done with, the federation (was basically moving into a time of refinement rather than having to worry that the experiment might still utterly and completely fail. TNG was basically one long, slow lesson of why that was a flawed notion. You don’t build a cruise liner, fill it with families, and then intentionally send it into the kind of peril that regularly befitted the Enterprise D. In retrospect, it was completely ridiculous.

VE3MAL ,
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God the Klingon thing was silly. Do we need an explanation as to why the TOS ship had plastic, 1960s themed furniture? Do we need an explanation for improved camera resolution over the years? Why did we need a silly explanation for the improvement in makeup artistry so many decades later? And the explanation doesn’t even work. Genetics don’t work like that. It’s taking themselves too seriously. Either ignore it, or hang a lantern on it with an inside joke once, and be done with it.

VE3MAL ,
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fyi, nearly everyone that succeeds in achieving morse proficiency recommend strongly against any sort of visual cues like this. It’s an auditory “language” and adding visual interpretation steps just adds cognitive load and hurts in the long run. It may be fine if your goal is to learn max 5 words per minute or something extremely slow.

VE3MAL ,
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Yes. This is a setting in the menu. Audio source is selectable separately for -D and non-D, so one of them can use the mic and one can use the aux, or whatever you want. I believe it also recalls the various DSP settings as well, so you can set things up how you like for phone, and for digi and easily toggle back and forth.

It’s not about a pre-set per-se, but about having 2 custom U/LSB profiles.

VE3MAL ,
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There’s negligible advantage in loss going from pl259 to N connectors on HF. You don’t have the kind of losses you do on VHF and especially UHF. The only time N is really nice is when you need an intrinsically weatherproof connector -but this is mounted inside the weatherproof box.

If you want slightly better loss specs AND a more convenient, quicker connector, BNC is great. But PL259, as I said, is fine.

VE3MAL ,
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It’s a (kind of silly) throwback to the radios that armies used in the first half of the 20th century that were large enough to necessitate a dedicated person backpacking them around everywhere. It’s still common in ham radio like other traditionalist terms. “Portable station” is more accurate, but maybe boring?

VE3MAL ,
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Amateur radios are generally spec’d at 13.8v plus or minus either 10% or 15% so that they work on a non-running car (12.something volts) or if an alternator is running a bit hot. A 100W radio like this is pretty much always going to require around 20amps at full power -but they have adjustable transmit power. They don’t transmit as well at the lower voltage range, but most people don’t worry about it.

VE3MAL ,
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Put the volt-meter in series with a switch or momentary button. They tend to draw a little power, so you don’t want it draining your battery when you are not using it. If you stick a cig (accessory) port in there too, you could plug in other things, or a usb charger or whatever if needed. I’ve used my pota battery to run a small 12v air compressor, for instance.

VE3MAL ,
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I would look at fabbing up a box that fits snugly, rather than “clamping” them. That could protect against puncture as well. A 3d print or thin plywood glued together would be fine.

Have watched TOS - Enterprise. Will watching Discovery-SNW increase my enjoyment of Lower Decks?

My partner and I have just binged TOS-Enterprise last year and we are starting Discovery today. I was just wondering if we can also start LD or will there still be jokes from Discovery (and the later shows) that we might miss out on? I have really bad FOMO anxiety and am worried there will be references in LD that we will miss...

VE3MAL ,
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This is a really good take. I have enjoyed the serialized shows -but they are a juggernaut of emotion and intensity to watch. You tend to watch them once, and it’s a fairly wild ride, but then it’s done. I suspect that I will be re-watching episodes of SNW and lower decks for years to come, as I have for TOS and TNG. That’s how Trek wormed it’s way into my brain in the first place.

VE3MAL ,
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Star Trek discussion /usually/ tends toward anything new being bad, and always has. SNW and lower decks are exceptions because they do so much fan service and return to a more classic Trek format. Discovery was groundbreaking in a way that I’m sure Roddenberry would have enjoyed, but groundbreaking also implies jarring change and throwing away things that work for experiments that sometimes don’t.

The urge to just get one more radio (lemmy.radio)

I’m vacationing in Japan at the moment, visiting relatives. It is sweltering so we stay mostly indoors, but I have been a couple of trips to akihabara. Initially I only meant to buy a used ic-7100 this year, but then of course I also needed a new psu, so alinco was it. After a couple of days I realize that an brand spanking...

VE3MAL ,
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Congrats, and careful with that mod. I purchased a used 7300 a while back that someone did a terrible wideband mod and antenna tuner mod.

VE3MAL ,
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I’ve played around with this before, and it does indeed seem to work quite well via audio coupling, which makes me think it’s probably a little more robust than typical packet. Glad to see the various new digital modes being developed for on FM. Some people just have an HT and need more toys to play with than just APRS.

VE3MAL ,
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In this case, their time may be better spent finding allies with interests in stopping yet another ratcheting up of high-frequency trading, and the market volatility and unfairness that it creates. There are some deep-pocketed investors (pension funds?) and well respected economists that will be able to tug on the FCC’s ears better than the ARRL ever could, provided the ARRL can encourage them to do so.

Those types would normally be only concerned with the FTC, but in this case, they can make good cases to the FCC that this particular use of the spectrum has no public benefit.

VE3MAL ,
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I think watching all those hours may actually change your brain wiring. Hopefully for the better.

I couldn’t really tolerate the animated show, or Babylon 5. But everything else has passed through these neurons at one time or another. Fortunately, it’s been so many years, I sometimes come across an episode I can’t remember and it’s like getting a new one.

Strange new worlds is amazing. It feels actually true to TOS, without just being nostalgic. I feel like Gene Roddenberry would be so happy to see it, and recognize it as his universe far more than any of the other 21st century trek.

VE3MAL ,
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The great thing about the fediverse is that you can rage-quit 100 different instances!

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