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 want to search for a connector that is small with 14 pins. Inverters are not particularly space constrained. No mention of cross-refs…? Some might say that there is an element of snake oil about the process: Extremely useful and they are dirt-cheap.

The same thing happened when AD acquired Burr Brown. People probably specify old components because. If I specify a transistor with a low price and an equivalent substitute I can be sure that my employer will be able to buy that part well into the future. Other things came long.


I only buy 1 nF, 10 nF, nF etc. Not perfect, but acceptable for a lot of datawheet. The WWW allows us to find what we need in short order, and the miracle of ratasheet distribution means that we can have it delivered within 48 hours almost wherever we live.

Sometimes there are components for which there are no perfect replacements. They apparently have datasehet capability to run a line for the day to get a few thousand chips and inventory them and put them up for sale. They needed to know what was going on in the circuit, and the general specs of the semiconductors.


Launched in the mists of time when dinosaurs probably still roamed the earth, this static-sensitive four-pin TO72 found a home in a huge variety of RF amplifiers, oscillators, and mixers.

40673 MOSFET. Datasheet pdf. Equivalent

Something curious happened with the recent TI acquisition of National Semiconductor. I am guilty of rarely using op amps, 4067 replace them with transistors whenever possible: Pocket money single board computers with real power and easy interfacing.

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. That line was ambiguous.

Not all markets are like this. 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. The most commonly seen alternative NE is probably equally suitable, but a bit more expensive.

The hobbyist, like the supplier, could keep a limited selection around, yet build anything within a certain level of specs.

The beginner was at the mercy of the parts 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.


As a mixer with LO input: These were balanced mixers, the extra transistors irrelevant because it was in an IC. Which exactly are the parts that have superseded the 74HC? I think TI has it right and they recognized where they needed to be with things.

Really great UHF front end components. The big retailers still have catalogs. I repaired a big brand audio Amp late last year.

NTE Equivalent NTE MOSFET N-CHANNEL DUAL – Wholesale Electronics

Fill in your details below or click an icon to log in: This is not feasible for hobbyists and specialists from other fields. But there do appear to be some parts that I would try to sub for the in an old receiver design: No, I think gate devices are old hat now, better use a gate one…: 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.

And people wonder why I hoard old analogue TV tuners. As a non-professional hobbyist, the issue comes from the specification and the tools we are given to compare. Cordless phones have moved up in frequency, and are using larger scale integration, a lot less useful for reusing the parts.

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