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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I would add my own observation that if digital logic can be done with NAND or NOR gates alone, analog can be reduced to relatively few parts as well. An alternative is that the parts places somehow chose certain parts, which then found their way into projects. The most expensive single chip I use today is the AD 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.

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

Unless you want to, that is. One wanted to be able to buy the exact parts specified, preferably at Radio Shack. The other elephant in the room is that the military does need parts also.

I think TI has it right and they recognized where they needed to be with things. These were balanced mixers, the extra transistors irrelevant because it was in an IC. Happened to stumble across two of those in my old bag of bits just the other day. BTW, for anyone who has to deal with a 3n, observe every ESD precaution in the planet with that part because they are extremely susceptible. We knew datashedt heart what each device was capable of, and 406673 eagerly devoured each new tidbit of information as it arrived.


Rochester electronics is one such place that will supply parts albeit expensively until the cows come home.

Datasheet(PDF) – New Jersey Semi-Conductor Products, Inc.

The 1n34a is such a part that does not seem to see much need outside of hobbyist radio circles. The 45 dB range 8 bits in voltage devices are dirt cheap and super common.

Another example would be lm But perhaps that meant stock. 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.

As far as I know, those boards are still being built the same way today. Some websites are absolutely woeful, bringing up results that have one word of your search in them, and in no way relate to what you need… eg: An Apple I replica like the Mimeo 1 needs old logic chips for artistic purposes. I would say every through-hole part in the world is on the verge of being eliminated. How times have changed. Really great UHF front end components.

In some cases, part numbers become descriptors rather than absolutes. They contained significant excerpts from semiconductor data sheets, and we read their wealth of information from cover to cover.

These publications were our only window into the world of electronic components.

I thought is was diode, cathode, electrode, overload, generator, oscillator. Those people probably bought the kit if it was available. And people wonder why I hoard old analogue TV tuners. I use a as a mixer as it happens, and in my application you start to hear the performance tail off somewhere above 10MHz with the HC part. I bought a few last-buys.

The second gate also made it easy to control the gain when used as an RF amplifier. Then there are the truly weird parts that may not see the light of day again.


If I specify a transistor with a low price and an equivalent substitute I can be sure that my employer will be eatasheet to buy that part well into the future.

데이터시트(PDF) – New Jersey Semi-Conductor Products, Inc.

BF, unless my memory fails me. So that may no longer be a source, especially if you want leads. The hobbyist, like the supplier, could keep a limited selection around, yet build anything within a certain level of specs. Not all markets are like this. I sure hope not!. Circabipolar transistors also had improved noise figure.

They wanted to use what they had, or what they could scrounge.

You are commenting using your Twitter account. Those were big ones too.

For me to do good work I have 406733 have a good concept of the parts catalog and keep up with new parts from suppliers and the state of the industry. Manufacturer names and part numbers would be better. But what prompted this piece was a far more egregious example of an old component still being specified: The window for scrounging is closing.

Now all this said there is perhaps a different case for the ol TL and the likes but still they are cheap. Printed catalogs still exist, but the sheer volume of information they contain forces brevity dagasheet their entries and expands the size of the publication to the point at which it becomes an unwieldy work of reference.

I personally do not understand why this part did not take off other than it is so dog gone hard to understand how they should work! As a non-professional hobbyist, the issue comes from the specification and the tools we are given to compare.

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