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Re: Interesting findings on the internet
Posted: Mon Aug 18, 2025 3:25 pm
by mnementh
I found these resources today while trawling for a .pdf manual for my Eico 250 VTVM:
https://www.worldradiohistory.com/Archi ... o-1974.pdf
https://www.kevinchant.com
mnem
kevinchantdotcom.jpg
Re: Interesting findings on the internet
Posted: Thu Aug 28, 2025 6:30 pm
by MED6753
EICO was a most worthy competitor to Heath. Sadly they went the way of the dodo too.
Edit...EICO also sold audio kits but I don't see them in that catalog. Perhaps it was a separate catalog. I do have an EICO catalog somewhere in my stash along with dozens of Heathkit catalogs.
Re: Interesting findings on the internet
Posted: Fri Aug 29, 2025 9:28 am
by Zenith
I always thought EICO was a lesser manufacturer of TE, not a kit company. We don't see EICO much this side of the pond. Heathkit/Daystrom was well established here and they had a factory in Gloucester. Heathkit turns up regularly at swapmeets here. I have a few units; a VTVM, a distortion meter and an audio wattmeter. There were a few other companies of that sort. Jason and Knight come to mind. Those sort of companies, like electronics shops aimed at hobbyists and hams, were things of a particular era.
Re: Interesting findings on the internet
Posted: Wed Sep 03, 2025 11:05 am
by tggzzz
We are used to fast transistors switching in ps. Now we have to get used to switching in as, attoseconds, 10
-18s.
Yup, forget GHz, forget THz, this is PHz territory.
...demonstrating a current on/off switching effect on a ~630 attosecond scale (~1.6 petahertz speed)...
https://www.planetanalog.com/attosecond ... switching/
Re: Interesting findings on the internet
Posted: Fri Sep 05, 2025 4:04 pm
by BU508A
How nature really measures space and time
Re: Interesting findings on the internet
Posted: Sat Sep 06, 2025 1:31 am
by tautech
The falls and rise of IC and component exports per country since 1980.
Re: Interesting findings on the internet
Posted: Mon Sep 08, 2025 9:06 am
by tggzzz
At last, some
interesting uses for smartphone... physics experiments using the phone sensors.
https://phyphox.org/ One example is a chirped sonar. Another is using the accelerometer to see heart rate.
It also shows raw sensor readings, e.g. number of GPS satellites and horizontal/vertical accuracy 6m/19m with 5 satellites, 2m/10m with 20 satellites.
Re: Interesting findings on the internet
Posted: Sat Sep 13, 2025 8:51 pm
by mnementh
Complete robot.jpg
https://archive.org/details/isaac-asimo ... volume-one
2 Giggibachis, 24 hours, All of
Asimov's Robot Stories in one audiobook.
mnem
should keep me off the street & out of trouble for a while... 
Re: Interesting findings on the internet
Posted: Fri Sep 19, 2025 7:55 am
by tggzzz
Got an open container of IPA at home? If you see any white crystals in it,
gently put it down, run away, and call the bomb squad....
https://www.sciencedirect.com/science/a ... 0924000754
https://www.sciencedirect.com/science/a ... 1225000347
https://pubs.acs.org/doi/10.1021/acs.op ... 12?ref=PDF paywalled, but the abstract is sufficient
You may already have seen that on the HPAK group
https://groups.io/g/HP-Agilent-Keysight ... age/153895
Re: Interesting findings on the internet
Posted: Tue Sep 30, 2025 5:22 pm
by mnementh
mnem
who you gonna call...?
Re: Interesting findings on the internet
Posted: Wed Oct 08, 2025 9:14 am
by tggzzz
Mesmerising Game of Life on steroids.
https://www.sagejenson.com/36points/
Use control panel dropdown on the top right to choose from 40 examples, and diddle the parameters. I rather like "growing on a sea of sand".
Some patterns take 30s to settle down, and unsurprisingly the starting point can be significant.
Explanations:
https://bleuje.com/physarum-explanation/
https://github.com/Bleuje/interactive-p ... me-ov-file
Re: Interesting findings on the internet
Posted: Sat Oct 11, 2025 12:54 am
by mnementh