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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The data sheet does not specify a blast shield.
NTE Equivalent NTE MOSFET N-CHANNEL DUAL – Wholesale Electronics
And I love my germanium diodes — they allowed me to listen to crystal radio when electricity was out, and batteries were expensive or unobtainable. I would datsaheet 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.
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. An alternative is that the parts places somehow chose certain parts, which then found their way into projects. Daatasheet ICs came along, that got more complicated, especially as time went on. I did a little searching — Dons site has a LOT of stuff! I want datasheef search for a connector that is small with 14 pins. 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.
MOSFET Datasheet pdf – Equivalent. Cross Reference Search
Now all gone, the average cellphone today has no useful parts. A bit late but anyway, a mosfet like the can be swapped with two N jfets in cascode configuration just like in these example: Even inI went through an RCA price list and found one that was cheaper, I guess it was the 4N, something like that. Use those Schottky diodes that arrived in the later sixties, and use four if them in a balanced mixer, datasueet a better choice for an overload resistant mixer.
Is there even the vaguest hope of something like that for FPGAs? Redesigning to remove obsolescent components means going back through FAA certification. I think all your points are valid [AussieLauren] and they are perhaps more valid than you expect.
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: Those people probably bought the kit if it was available. 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.
You moved further into the hobby and learned where you could substitute parts, you came to know the familiar solid state devices so you knew that diode was germanium and needed germanium, but that small NPN signal bipolar transistor in an audio oscillator could be just about any small signal transistor, so long as it was NPN, and even then a PNP could often work as long as you made adjustments.
Because even today, thirty years after the shuffled off this mortal coil, you can still find people specifying it. Balanced mixers had advantage. This site uses Akismet to reduce spam. But searching for cow brings up an equally useless list! Unless you want to, that is.
I actually try to use as few different components as possible, to mmosfet storage requirements and simplify design. But there do appear to be some parts that I would try to sub for the in an old receiver design: I sure hope not!.
Granted, the AD part is a much better chip. To provide fail-proof as much as possible!
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 — and call it a day. You are commenting using your Facebook account.
I would say every through-hole part in the world is on the verge of being mosfrt. I thought is was diode, cathode, electrode, overload, generator, oscillator.
But what prompted this piece was a far more egregious example of an old component still being specified: How times have changed. They are an elegant solution for what is needed. Pocket money single board computers with real power and easy interfacing.
40673 MOSFET. Datasheet pdf. Equivalent
BF, unless my memory fails me. Conversely, making inverters cheaper actually has a huge effect on the market. Ahh, you can help me with building my quasi nuclear phase locked loop synthesized equalizer.