A VPS @ Hetzner, exim4. No problems with deliverability.
Readit Newscuriousfab commented on Ask HN: What email service(s) do you use for your side projects? · Posted by u/jtap
The variation in local noise between different locations is huge. As an apartment dweller and radio amateur, this is something I am fighting every day and in a densely populated environment, the noise floor changes all the time, depending on which neighbor operates which electrical device at the time...
The amateur radio community is very aware of the problems and several initiatives have been launched to quantify the effects. One of them is the DARC's ENAMS, which is described in detail here:
https://web.tapr.org/meetings/DCC_2020/DK5HH/F_ENAMS-DCC-DK5...
curiousfab commented on Cloudflare automatically fixes Polyfill.io for free sites blog.cloudflare.com/autom... · Posted by u/kylehotchkiss
Setting a dangerous precedent, especially doing this by default (no opt-in) needed.
But then again, if the people who carelessly include 3rd party dependencies (i.e. playing with fire) are those who use CF... they probably won't object to it :-)
curiousfab commented on How automotive radar measures the velocity of objects viksnewsletter.com/p/how-... · Posted by u/subbdue
What will happen if every single car has radar? Wouldn't they interfere? You're stuck in traffic and 300 nearby cars are blasting radars all over the place?
Typical FMCW radars transmit very short ramps (microseconds) at a very long (relatively) intervals (several ten milliseconds), i.e. a duty cycle of less than 0.1%.
In order to create interference between two radars, the ramps have to overlap pretty exactly, within a few nanoseconds of each other. This is very unlikely to happen.
Modern radars employ technologies to detect and/or avoid such collisions.
Overall it is not really an issue, even with many radars in crowded spaces.
curiousfab commented on Ask HN: What do devs use for quickly setting up a feedback form? · Posted by u/mmarian
I am running a few websites which have a simple feedback forms which POST to a simple PHP script that sends me an email.
By filtering for a few keywords, you can get of 99% of the form spam.
Deliverability has never been an issue for me since (of course) I run my own mail server. But I doubt it's a serious issue when you take the little time it takes to set up DKIM etc.
I wouldn't make it more complicated than it has to be :-)
I would be surprised if MF/HF reception was usable. Normally you need big discrete components for that. Just a marketing gimmick maybe?
Depends on what's "usable" for you :-)
This SDR won't be able to compete with expensive high performance receivers that have a lot of pre-selection, but there are many examples of low cost SDRs that do a surprisingly good job on the HF bands (without too much pre-selection).
I suppose the performance in the HF range will be similar to KiWiSDR, AirSpy, or the RedPitaya. If you want to know how well they work, there are many KiWiSDRs online to listen to :-)
The interesting part is certainly that it delivers 50 MHz bandwidth up to 6 GHz, which exceeds e.g. what the ADALM Pluto can do.
Certainly an interesting product at an attractive price tag. I consider getting one!
Interestingly Wikipedia says the Morse version of it is
Morse code "dah-di-di-dah-di, dah-dit" ( –··–· –· )
https://lcwo.net/ext/player?z=MjR%2BfjIwfn42MDB%2BfkVTRSBFRQ...
"ESE" is a popular Amateur radio call-sign suffix among Morse enthusiasts for that reason.
KiCad. It's very stable and offers features that some of the professional programs lack. Extensive part library built-in, and easy to extend. Under active development.
Not generally useful to show this by default, because nowadays most pages are dynamically generated and although it's technically easy to implement, the last modified header is typically not set to $now.