curiousfab

Ctrl+i (Firefox)

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.

A VPS @ Hetzner, exim4. No problems with deliverability.

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 :-)

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.

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 :-)

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!

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.

Fantastic tool. It also has a command line version which has almost completely replaced `bc` for me.

From an average of significantly below 500k to almost 2.5M users. This drives up the global number of connecting users from approx. 3M to almost 5M.

Hard to imagine that so many people in Germany suddenly switched to TOR, especially since there has not been any significant event lately that may have triggered such a decision (afaik)?

My personal experience with TOR (as an administrator of various websites and services) is that it is a major source of unwanted/malicious traffic (spam, etc.) and most of it is automated. The big increase is probably not users but bots?