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s, probably now worth more by weight than anything else on four legs .. I went on Digikey, armed with a data sheet, and there do. NTE Equvilent NTE MOSFET N-CHANNEL DUAL GATE 20V IDSS= 5- 35MA TO CASE GATE PROTECTED VHF AMP/MIXER NTE Data Sheet. Tube or Röhre ID, Transistor, Wires and VHF shown. Radio tubes are valves.

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Use those Schottky diodes that arrived in the later sixties, and use four if them in a balanced mixer, often a better choice for an overload resistant mixer. When ICs came along, that got more complicated, especially as time went on. They contained significant datasheer from semiconductor data sheets, and we read their wealth of information daatasheet cover to cover. One wanted to be able to buy the exact parts specified, preferably at Radio Shack.

Really great UHF front end components. The datsheet dB range 8 bits in voltage devices are dirt cheap and super common. Which exactly are the parts that have superseded the 74HC?


Sometimes there are components for which there are no datasheet replacements. A bit late but anyway, a mosfet like the can be swapped with two N jfets in cascode configuration just like in these example:. That thing is everywhere and not very many others can run off a single supply which the lm was famous for.


Not all markets are like this. Epoxy-blobs, I tell you!

There were always two camps. To that end you can find more than one manufacturer of these parts that seem to have an eternal need. Get a 1N82 if you wanted better frequency response, thy were found in UHF tv tuners. The most expensive single chip I use today is the AD No mention of cross-refs…?

Big paper-bound books the size of telephone directories were our only window into the exciting world of electronic components. These were balanced mixers, the extra transistors irrelevant because it was in an IC.

Other things came long. Hang on, this is Hackaday.

The Curse Of The 40673: Zombie Components That Refuse To Die

And I love my germanium diodes — they allowed me to listen to crystal radio when electricity was out, and batteries were expensive or unobtainable. The other elephant in the room is that the military does need parts also.

As a fresh-faced electronic engineering student while the first Gulf War was raging in a far-off desert, I learned my way through the different families of 74 logic at a university in the North of England.


They are an elegant solution for what is needed.

, Tube ; Röhre ID, Transistor

I think TI has it right and they recognized datasheeet they needed to be with things. I encourage everybody to design with that part so it will be continue to be made! Information rich and knowledge poor is probably going to be the biggest obstacle in the next few generations. If HC does your job then of course, use it. The most commonly seen alternative NE is probably equally suitable, but a bit more expensive.

What the full-blown rant in the previous paragraphs has been building up to is fatasheet Another part that came and went but in my mind at least showed fantastic promise was the tunnel diode. But who knows when someone will quietly bring them forth again.

And you can go from e. Seriously, they made a chip just for that.