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
Interesting findings on the internet
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Re: Interesting findings on the internet
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Re: Interesting findings on the internet
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.
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.
An old gray beard with an attitude. I don't bite.....sometimes 
Re: Interesting findings on the internet
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
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/
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
The falls and rise of IC and component exports per country since 1980.
Siglent Distributor NZ, TE Enabler
Re: Interesting findings on the internet
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.
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
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...
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...
You do not have the required permissions to view the files attached to this post.
Re: Interesting findings on the internet
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
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
tggzzz wrote: ↑Fri Sep 19, 2025 7:55 am 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
mnem
who you gonna call...?
Re: Interesting findings on the internet
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
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
From the "About Bloody Time Too" department...
https://www.theguardian.com/world/2025/ ... the-movies
Move over, Alan Turing: meet the working-class hero of Bletchley Park you didn’t see in the movies
https://www.theguardian.com/world/2025/ ... the-movies
Move over, Alan Turing: meet the working-class hero of Bletchley Park you didn’t see in the movies
Re: Interesting findings on the internet
Oh yes. Tommy Flowers was the Dollis Hill Post Office engineer who made Colossus. So he made Turing's ideas practical. And Welchman worked out where to apply Turing's ideas. Don't tell me; you're keeping an eye out for a Colossus... They're quite big and probably rather power-hungry judging by the number of valves. Still, it would make your recent VNA acquisition look small.
Re: Interesting findings on the internet
I will tolerate one tube/valve in a piece of test equipment. 1500? Not a chance!
Re: Interesting findings on the internet
A quick calculation says that if they were all 6J5 (which were in Colossus), that would be 2.8kW of heater power. Cosy.
Re: Interesting findings on the internet
I've been in the room when it was running at TNMOC. It sure feels like 2.8kw!
Re: Interesting findings on the internet
I keep meaning to visit TNMOC. Talking of museum pieces, my Windoze XP machine was getting difficult about booting. A friend suggested that dodgy RAM was likely. I unplugged one of the 1Gb cards, started looking in the BIOS, pressed "ESC" too many times and it booted. And again on three successive days. So it could be that RAM card or it could be the socket. I bought two 2Gb cards and fitted them and job's a good 'un. It's a nice quick machine (2.4GHz, quad core, SSD, racing pegs) and is my workhorse. Much nicer than this horrible thing.
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Cubdriver
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Re: Interesting findings on the internet
My limit thus far has been something over 70 with the HP 524 series counters. It's almost time to break one out and start wowrking on it again - it's getting colder in these parts...
-Pat
Re: Interesting findings on the internet
I traditionally visit it after DDARC in Luton. Highly recommended: where else can you discuss schematics with the helpers :0
I arrange my Xfce window manager to act like WinXP. I hate hidden Start Menu items that move around. And just don't mention "modern" hintless touch screen fondleslab GUIs.Talking of museum pieces, my Windoze XP machine was getting difficult about booting. A friend suggested that dodgy RAM was likely. I unplugged one of the 1Gb cards, started looking in the BIOS, pressed "ESC" too many times and it booted. And again on three successive days. So it could be that RAM card or it could be the socket. I bought two 2Gb cards and fitted them and job's a good 'un. It's a nice quick machine (2.4GHz, quad core, SSD, racing pegs) and is my workhorse. Much nicer than this horrible thing.
Re: Interesting findings on the internet
Now that's a real piece of electronics; even the cat's impressed. All those valves and bevel gears too!
Real computers admit they are computers and don't pretend to be 'phones. They have mice, standardised keyboards, and their screens are not touched because we don't tolerate fingerprints on the anti-flare coating. Moreover, they do real computing things; big engineering spreadsheets, SPICE, technical drawing, running experiments over GPIB. They do not play Doom.
Real computers admit they are computers and don't pretend to be 'phones. They have mice, standardised keyboards, and their screens are not touched because we don't tolerate fingerprints on the anti-flare coating. Moreover, they do real computing things; big engineering spreadsheets, SPICE, technical drawing, running experiments over GPIB. They do not play Doom.