I went on Digikey, armed with a data sheet, and there do appear I searched on “MOSFET dual gate” and RF Fets, and found a bunch. MOSFET datasheet, cross reference, circuit and application notes in pdf format. NTE Equvilent NTE MOSFET N-CHANNEL DUAL GATE 20V IDSS= 5- 35MA TO CASE GATE PROTECTED VHF AMP/MIXER NTE Data Sheet.
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But there do appear to be some parts that I would datashedt to sub for the in an old receiver design: The hobbyist, like the supplier, mossfet keep a limited selection around, yet build anything within a certain level of specs. Inverters are not datashert space constrained.
So I hope that other manufacturers will extend their manufacturing in such a manner. Redesigning to remove obsolescent components means going back through FAA certification. I thought someone kept making germanium, but it may be as much as twenty years since I heard that.
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: We therefore tend to stick with the devices and components we know, regardless of their cost or of whether they have been superseded, and our work is poorer for it.
Datasheet(PDF) – New Jersey Semi-Conductor Products, Inc.
Someone would pick a device based on specs or availability, and write about the project. Leave a Reply Cancel reply Enter your comment here I am guilty of rarely using op amps, and replace them with transistors whenever possible: You had to buy the kit, or hope the author would supply the IC.
In general, they still keep the same functionality and numbering-scheme. The other camp wanted cheap. My understanding is that they have a reasonably good NF and they allow you to build a combination mixer-amplifier in a single device. I thought is was diode, cathode, electrode, overload, generator, oscillator.
It completely fails at about 70MHz. My EE course tried to teach me to be an EE academic more than it did a professional engineer. Other things came long. I think TI has it right and they recognized where they needed to be with things. At the time, there was an upstart on the scene: 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 mksfet to redesign using modern parts.
40673 MOSFET. Datasheet pdf. Equivalent
The 1n34a is such a part that does not seem to see much need outside of hobbyist radio circles. We knew by heart what each device was capable of, and we eagerly devoured each new tidbit of information as it arrived.
Circuits in the maker and hobbyist arena have a nasty habit of sticking around, regardless of how good they are. So you take your 5-year guaranteed availability promise if you even get one, be grateful as hell for it — yes sir, very well sir, thank you sir — ddatasheet call it a day. Detector diodes have modern replacements, but power germaniums do not, and I have searched hard!
Extremely useful and they are dirt-cheap. Epoxy-blobs, I tell you!
MOSFET Datasheet pdf – Equivalent. Cross Reference Search
Email required Address never made public. The beginner was at the mercy of the mosfef list, buying that expensive HEP IC because he wanted to follow the article exactly out of fear of making a mistake, not realizing the author specified that HEP replacement line part because it was very available. Manufacturer names and part numbers would be better. 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.
The 45 dB range 8 bits in voltage devices are dirt cheap and super common. 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. Higher performance mixers like a diode double balanced mixer would likely require way more components as well as an extra RF amp stage and a diplexer. Skyworks do detector diodes that are much better than the old germanium ones.
When ICs came along, that got more complicated, especially as time went on. I bought a few last-buys. Digikey is one of the better ones, but still inadequate.