General > General Technical Chat
Once upon a time in the '70'S in WirelessWorld...........
Kilo Tango:
I remember, when I were but a lad, building a digital clock using 7400 series logic and a 6.3V heater transformer. It would have cost a fortune to buy all the chips and display, however I spend a summer working at "a certain computer company", and got a load of faulty logic boards and then found out what the specially marked codes meant. Trouble was any electrical spike and the time would jump, a good excuse for sleeping in !.
Ken
MarkMLl:
--- Quote from: Kilo Tango on February 09, 2020, 08:22:44 pm ---I remember, when I were but a lad...
--- End quote ---
You were lucky... the computer company I worked for didn't use standard TTL or CMOS, they rebadged what I believe was Fairchild CTL as something they had invented themselves and of course promoted it as superior to every alternative.
MarkMLl
vk6zgo:
--- Quote from: MarkMLl on February 10, 2020, 03:38:57 pm ---
--- Quote from: Kilo Tango on February 09, 2020, 08:22:44 pm ---I remember, when I were but a lad...
--- End quote ---
You were lucky... the computer company I worked for didn't use standard TTL or CMOS, they rebadged what I believe was Fairchild CTL as something they had invented themselves and of course promoted it as superior to every alternative.
MarkMLl
--- End quote ---
Somebody at Telecom Australia's Lab back in the day had an "in" with Fairchild, & many of their projects had weird devices without any generic equivalents, so regular Fairchild ICs & transistors were hassle enough without someone rebadging them.
The TA lab also used one type of Siemens optocoupler, which was seemingly,the same as all the other ones in a six pin package, except that it had a different pinout.
Does anyone recall that type, & why it was different?
vk6zgo:
--- Quote from: coppice on February 02, 2020, 03:21:55 pm ---
--- Quote from: unknownparticle on January 31, 2020, 05:19:22 pm ---I agree with that, WW was truly excellent, I've never seen anything better.
--- End quote ---
Wireless World was an excellent magazine in its early days. It was the only UK magazine that tried to appeal to both amateur and professional people. As the years went by, however, they started dumbing it down, removing its appeal for all the groups who used to enjoy it, without really generating new markets.
--- End quote ---
I particularly enjoyed the "Letters" section.
The well known Ivor Catt had written a very erudite article, & there were comments from "Weever-Mowse", & "Ouida Dogg", among others.
I always liked how people could have fun, whist still making a valuable contribution to the discussion.
coppice:
--- Quote from: vk6zgo on February 13, 2020, 03:02:54 am ---
--- Quote from: coppice on February 02, 2020, 03:21:55 pm ---
--- Quote from: unknownparticle on January 31, 2020, 05:19:22 pm ---I agree with that, WW was truly excellent, I've never seen anything better.
--- End quote ---
Wireless World was an excellent magazine in its early days. It was the only UK magazine that tried to appeal to both amateur and professional people. As the years went by, however, they started dumbing it down, removing its appeal for all the groups who used to enjoy it, without really generating new markets.
--- End quote ---
I particularly enjoyed the "Letters" section.
The well known Ivor Catt had written a very erudite article, & there were comments from "Weever-Mowse", & "Ouida Dogg", among others.
I always liked how people could have fun, whist still making a valuable contribution to the discussion.
--- End quote ---
I use to know Ivor Catt. He is a very interesting character. "The Catt Concept" is a classic book for those frustrated with industrial insanity.
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