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

That is exactly what I suspected. Happened to stumble across two of those in my old bag of bits just the other day.

An alternative is that the parts places somehow chose certain parts, which then found their way into projects. An Apple I replica like the Mimeo 1 needs old datasheft chips for artistic purposes.

You are commenting using your Twitter account. A part that has been in dtaasheet for a long period of time has proven its worth. They contained significant excerpts from semiconductor data sheets, and we read their wealth of information from cover to cover.

Not all markets are like this. Email required Address never made public. I thought someone kept making germanium, but it may be as much as twenty years since I heard that. Yes, a 3v3 family is not a drop-in replacement for a 5v part. But then again the young generation have opportunities we never came near.


This all is much 4673 these days now that parts counterfeiting is a major issue. Conversely, making inverters cheaper actually has a huge effect on the market. Detector diodes have modern replacements, but power germaniums do not, and I have searched hard!

The specific reason that most of your criticism is not correct is because there are some numbers and parts that are so perfect for their required design purpose that it seems more work or cumbersome to redesign using modern parts. There was a vast selection, but hobbyists used a small subset, because the hobby suppliers were easier to del with, as well as the ubiquitous Radio Shack.

Extremely useful and they are dirt-cheap. Another example is the famous and storied 2n transistor made by Central Semi.

40673 MOSFET. Datasheet pdf. Equivalent

Another part that came and went but in my mind at least showed fantastic promise was the tunnel diode. Then there are the truly weird parts that may not see the light of day again. Fill in your details below or click an icon to log in: Is there even the vaguest hope of something like that for FPGAs? OK, maybe germanium diodes are an edge case and the examples above have a radio flavour, but you get the picture.

I appreciate your criticism not because the criticism is correct, but rather it is datasneet accurate observation about the lack of part availability. I am guilty of rarely using op amps, and replace them with transistors whenever possible: The data sheet does not specify a blast shield.


I sure hope not!. And connectors seem to be not a vatasheet of theirs in the way semiconductors are. Definitely not for new in-production designs. Because even today, thirty years after the shuffled off this mortal coil, you can still find people specifying it. This is not feasible for hobbyists and specialists from other fields. And people wonder why I hoard old analogue TV tuners.

My EE course tried to teach me to be an EE academic more than it did a professional engineer. Leave a Reply Cancel reply Enter your comment here I thought is was diode, cathode, electrode, overload, generator, oscillator. 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.

I would say every through-hole part datashewt the world is on the verge of being eliminated. The same thing happened when AD acquired Burr Brown.

The other camp wanted cheap.

_PDF Datasheet Download IC-ON-LINE

So that may no longer be a source, especially if you want leads. Sometimes there are components for which there are no perfect replacements. The hobbyist, like the supplier, could keep a limited selection around, yet build anything 4673 a certain level of specs. Inverters are not particularly space constrained.