I believe the part I am looking for to fix my E4411A is a HP (Agilent) ATF-21186 GaAs FET.? The '21186 went out of production in 2001, so I'm trying to hunt down sources for it that would sell to a hobbyist.? I'm not cheap, but I don't want to buy a 1K reel of them either, so I'm reluctant to try and contact the usual "hard-to-find" outfits that cater to industry.? I may be off base here, so if you have positive experience doing that, I'm all ears.

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The -STR suffix (ATF21186-STR) is for a 10 piece strip according to HP's datasheet, which gives me a possibility for getting a few devices as spares without having to "break a reel".? I would also be willing to buy a surplus HP assembly of some kind to get the part out of.? Unfortunately, I don't know what other instrument the part is used in, nor have I been able to find the HP internal part number.

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Any input regarding places to look to buy parts would be greatly appreciated.?

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Regards,

Don C

Beaverton, OR