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.