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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This is probably leftover from my war years: I repaired a big brand audio Amp late last year. Those were big ones too. Of course, if you know of a good candidate for replacing theplease share dataheet details.

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: I actually try to use as few different components as possible, to reduce storage requirements and simplify design. In short, when we specified a component, we did so with a pretty good knowledge of all the components that were available to us. No, I think gate devices are old hat now, better use a gate one…: Other things came long.

Another example would be lm Now all gone, the average cellphone today has no useful parts. Some FM broadcast band tuners used them, so maybe car radios are a source. My understanding is that they have a reasonably good NF and they allow you to build a combination mixer-amplifier datashewt a single device. I want to ratasheet for a connector that is small with 14 pins.


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

Epoxy-blobs, I tell you! Ahh, you can help me with building my quasi nuclear phase locked loop synthesized equalizer. Which I think was not particularly good.

Most of what Burr Brown was making was carried over to AD with nary a change in part number. Higher performance mixers dataxheet a diode double balanced mixer would likely require way more components as well as an extra RF amp stage and a diplexer.

A part that has been in use for a long period of time has proven its worth. BTW, for anyone who 4067 to deal with a 3n, observe every ESD precaution in the planet with that part because they are extremely susceptible. You are commenting using your Facebook account. Happened to stumble across two of those in my old bag of bits just the other day. So that may datxsheet longer be a source, especially if you want leads.

Great article all the same. By using our website and services, you expressly agree to the placement of our performance, functionality and advertising cookies.

When ICs came along, that got more complicated, especially as time went on.

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

There is of course also a slightly macabre alternative scenario. 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. Datasheet all this said there is perhaps a different case for the ol TL and the likes but still they are cheap.


They apparently have the capability to run a line for the day to get a few thousand chips and inventory them and put them up for sale. It completely fails at about 70MHz. The hobbyist, like the supplier, could keep a limited selection around, yet build anything within a certain level of specs.

40673 MOSFET. Datasheet pdf. Equivalent

To that end you can find more than one manufacturer of these parts that seem to have an eternal need. 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.

You could pull roofing filters out of them, and crystals to convert from there to KHz, and complete KHz fm if strips. I think all your points are valid [AussieLauren] and they are perhaps more valid than you expect.

Something curious happened with the recent TI acquisition of National Semiconductor. Unless you want to, that is.

If HC does your job then of course, use it. But there do appear to be datqsheet parts that I would try to sub for the in an old receiver datasheett They contained significant excerpts from semiconductor data sheets, and we read their wealth of information from cover to cover.

Others would use the same device, because someone had chosen it. One wanted to be able to buy the exact parts specified, preferably at Radio Shack.