Miguel A. Vallejo

Mostly ham radio, electronics, programming, microprocessors, radiation and (radio) astronomy

[Miguel A. Vallejo @ea4eoz]

The 10-hour blackout in Spain confirmed that switching power supplies have destroyed amateur radio. 10 hours of noise-free bands and extremely weak signals with crystal-clear audio. Just incredible! But everything went to hell when the power came back on.

[Miguel A. Vallejo @ea4eoz]

@LazerRaymond @BadalK99277 You are wrong

[Miguel A. Vallejo @ea4eoz]

@OwenBrakes Isn't this the same thing @cnlohr did two years ago?

https://t.co/eJtpGhPrPI

https://t.co/vrrSb6eFTb

[Miguel A. Vallejo @ea4eoz]

@petty_anon @davepl1968 I want a perpetual license, as it has always been. Valid as long as the hardware continues to function.

[Miguel A. Vallejo @ea4eoz]

For all these years I believed that root was the all-powerful user who could do anything on the system. Even destroy it. I was wrong. Secure Boot is.

[Miguel A. Vallejo @ea4eoz]

@Dave_Maynor Yes... the 68k family was very important (the byte order on the network is due to the 68k family), but device compatibility wasn't as good as in the x86 family. In the long run, this hurt it.

[Miguel A. Vallejo @ea4eoz]

@Dave_Maynor @usrbinsean Many Mediatek WiFi adapters has a MIPS cpu inside

[Miguel A. Vallejo @ea4eoz]

@jacquesrouxsa Adjustable coils are already an endangered species

[Miguel A. Vallejo @ea4eoz]

@BadalK99277 C

[Miguel A. Vallejo @ea4eoz]

@AksharVastarpar @ElectronicsbyJH @dwarkesh_sp @reinerpope @Vicharak_In A coffee here cost me just $2

[Miguel A. Vallejo @ea4eoz]

@MehdiHacks @ElecNotes I know. That's why I stopped playing with microwaves, too expensive items for so little return. But cost less than others doesn't make them cheap.

[Miguel A. Vallejo @ea4eoz]

@MehdiHacks @ElecNotes >>> (that's why they're cheap)

Cheap:

[Miguel A. Vallejo @ea4eoz]

@luigifcruz better late than never ;-)

[Miguel A. Vallejo @ea4eoz]

@fiddledbits I don't know. That's why I'm asking.

[Miguel A. Vallejo @ea4eoz]

I've been seeing these signals, barely 3 kHz wide and lasting half a second or less, on various SDRs and across different ham bands for weeks. They appear on random frequencies, and when you manage to hear one, it's clearly a digital signal.

Any ideas?

[Miguel A. Vallejo @ea4eoz]

@SendaoTrust @schteppe To be honest, I've never seen hh and cc file extensions for C++ files.

[Miguel A. Vallejo @ea4eoz]

@b0zx4 It is very difficult to capture the audio because its occurrence is completely random, both in time and frequency.

[Miguel A. Vallejo @ea4eoz]

@hszanowski I prefer Java

[Miguel A. Vallejo @ea4eoz]

@ycombinator @NineFivesRF > WHY IS TEST EQUIPMENT STILL STUCK IN 1999?

Money. We are poor.