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Re: 3SK166A dual gate GaAs MES FET replacement?

I work at a physics lab and we have some custom hardware that have

> been developed by researches along the years. We are trying to fix one > of them, but it uses a component that we are having a hard time to > find: It is a N-channel dual gate GaAs MES FET by Sony called 3SK166A.

Just from Googling, one broker claims to have stock on a 3SK166,

3SK166-1, and 3SK166A. I have never dealt with this broker before.

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Brokers like this one buy up inventories of old parts from other suppliers, and/or send out random parts with false part numbers on them. Sometimes you will get the genuine part at a bargain price, and sometimes you will get a part that does not work at all.

We need help finding a compatible replacement for this component.

I have cross-posted this reply to sci.electronics.design, which is much more active than sci.electronics.components . It also has people smarter than I am who might be able to suggest a replacement. :)

What claims to be the Sony datasheet is available at:

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Some of the interesting parameters seem to be: Vds 8 V, Vgs -6 V, Id 80 mA, Pd 150 mW, gain about 20 dB. The datasheet gives S parameters and noise figures for a range of 200 to 2,000 MHz. The package is a Sony M-254; it doesn't list an EIA or JEDEC package code.

Standard disclaimers apply: I don't get money or other consideration from any companies mentioned.

Matt Roberds

Reply to
mroberds
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Once upon a time similar dual-gate MESFETs were made by CEL (California Eastern Laboratories), then a subsidiary of NEC.

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DigiKey and Arrow used to carry them.

Here's an ancient link to the NE251, one of my old fave dual-gate MESFETs in the same ballpark as the 3SK166A:

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It looks like CEL's been sold to Renesas and the dual-gates may be gone. They're wonderful parts--dunno why they went out of vogue.

GaAs MESFETs:

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Maybe these clues will set you on the trail? I *might* even have some NE251xx's in the dungeon (but might've given them away).

HTH,

James Arthur

Reply to
dagmargoodboat

Looks a lot like an NE25139, also obsolete.

--

John Larkin                  Highland Technology Inc 
www.highlandtechnology.com   jlarkin at highlandtechnology dot com    

Precision electronic instrumentation
Reply to
John Larkin

They seem to have an Ebay presence as well, selling this part. It may be easier getting it from there.

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Reply to
JW

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