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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Definitely not for new in-production designs.
40673 MOSFET. Datasheet pdf. Equivalent
Transistors came along, and early shortwave radios were often lousy, the bipolar transistors overloaded too easily. On the gripping hand, Sometimes I think the FTDI clones got it right; emulate and package as the original, name it as the original, and use modern process inside, invisible to the hobbyist. No mention of cross-refs…? Those were big ones too. 440673
40673 – DUAL-GATE MOSFET
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. Now all this said there is perhaps a different case for the ol TL and the likes but still they are cheap.
My understanding is that they have a reasonably good NF and they allow datqsheet to build a combination 406733 in a single device.
It would be nice to make such a simple choice but in reality there are many times that you have to support 5 Volt systems. It completely fails at about 70MHz. People probably specify old components because. I used it dataasheet fair bit. I am guilty of rarely using op amps, and replace them with transistors whenever possible: Thus an association was formed, when you want a quick logic datzsheet then 74HC is the modern one to go for.
데이터시트(PDF) – New Jersey Semi-Conductor Products, Inc.
Another part that came and went but in my mind at least showed fantastic promise was the tunnel diode. But a cheap opamp was the same part. They are an elegant solution for what is needed. The other camp wanted cheap. There are markets where product life expectancy and maintainability are more of concern and this introduces some other dynamics. Not perfect, but acceptable for a lot of uses.
Seriously, they made a chip just for that. You had to buy the kit, or hope the author would supply the IC.
Datasheet(PDF) – New Jersey Semi-Conductor Products, Inc.
Someone would pick a device based on specs or availability, and write about the project. Happened to stumble across two of those in my old bag of bits just the other day. The big retailers still have catalogs.
Yes, datashdet 3v3 family is not a drop-in replacement for a 5v part. This all is much harder these days now that parts counterfeiting is a major issue. You are commenting using your Twitter account.
You are commenting using your WordPress. So blindly switching from HC to AC is a bit dangerous. I guess it comes down to what you mean by replacement.
The WWW allows us to find what we need in short order, and the miracle of global distribution means that we can have datssheet delivered within 48 hours almost wherever we live. This is probably leftover from my war years: A bit late but anyway, a mosfet like the can be swapped with two N jfets in cascode configuration just like in these example: In some cases, part numbers become descriptors rather than absolutes.
So who knows, there might be a demand for them again! One wanted to be able to buy the exact parts specified, preferably at Radio Shack. There is of course also a slightly macabre alternative scenario.