Jason - VE3MAL

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. 🤷‍♂️

It’s a neat idea, but could be implemented entirely in software with a RTLSDR. Not my cup of tea, but I’m all for absolutely ANYTHING that gets more activity on V/UHF.

A longer term project goal for me would be a SBC and a couple RTLSDRs with a good antenna that simultaneously does APRS igating, streaming audio of all the local repeaters and a few simplex channels, and notifications like this project, and like the “adventure radio” project that uses CTCSS tones to trigger alerts. I think it would be a nice service to provide for locals. The only “trick” is that RTLSDRs can only simultaneously decode within a 2.5mhz window, so it would probably require a little scanning to cover everything, or too many sticks. Doing a project cheaply, but effectively, encourages copy-cats.

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.

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

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.

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.

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.

Oh, I see. This is kind of what people often do with “Cross-band” repeat modes on some mobile radios -but in your case, mixing DMR and analogue. You need to be cross-band unless you have all the filtering that is in place with an actual repeater. That MMDVM board will be overloaded unless the analogue radio is on a different band.

Yes, Allstar can absolutely be used as a repeater controller like this, but your specific plan might be easier to develop yourself from scratch, idk. Pi-star supports that MMDVM modem out of the box, but it doesn’t provide a way to interface audio, and it isn’t set up to do any repeater controller work. It doesn’t even decode/encode audio at all, it just passes the codec data as-is.

If I was doing this, I might actually use 2 rpis -one just as a typical MMDVM/Pi-star hotspot, and another as an Allstar node connected to that analogue radio. The latter can be set up to bridge to DMR, and thus allowing your MMDVM hotspot to link in. It will need hardware or software codecs though. You might not want 2 pi settups, but that might be handy as your dmr hot spot can move around with your HT.

I don’t think so. You probably want something like AllStarLink instead.