starman ) writes:
Paul_Morphy wrote:

"N3KCT" wrote in message
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Do you think the NTE-312 would perform the same as the 2SK152?

The NTE-312 is the cross for 2SK152. They should be
electrically identical, and should perform as such.

Well, not exactly. It's the closest match NTE has to the 2SK152, and
"should" function in most circuits. That isn't to say it is an exact
replacement. The NTE device may have a higher noise figure, for example,
which could be obvious on the higher bands. This company in Ireland claims
to be selling the 2SK152 for 62 US cents apiece:
http://www.donberg.ie/descript/2/2sk152.htm

The J310 FET is pretty good, and available from Kits & Parts, and either
Mouser or DigiKey; I can't remember who I got mine from. The price is right
and it might be worth buying several and swapping them in for best
performance.

"PM"

Why is the 2SK152 so rare?

It may be location.

That uses the Japanese numbering scheme (the "SK"), and for whatever
reasons they tend to arrive and be used in North America as replacement
parts in Japanese made equipment that uses them in the first place. Hobby
circles and repair circles don't always overlap (the less so as the years
go by), so many of the places hobbyists can get devices (more specically
buy things without having to buy the item in large quantities or order
a large order of parts) don't carry them. They aren't normally used
in construction articles over here, so such places don't bother with them,
which of course reinforces the lack of interest.

They may be a very common device in Japan (and maybe other parts of the world
that Japanese parts dominate), but they aren't over here.

Michael