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Re: OT: Qualcomm to send NXP to the chop shop

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Am 08.11.2016 um 21:22 schrieb Robert Latest:
> Phil Hobbs wrote:
>> Hmm, they don't list JFETs anywhere there.
>
> That's right, and I don't understand it. I know NXP sells the great BF862,
> but I don't know where it's made (not in one of their two discrete fabs),
> it's not in their selection guides, you won't find it under "Applications"
> nor under "Products" on the website. The website only admits to its
> existence if you directly enter the type number in the search box.

I have stored that from diyaudio.com:

======
Thread Home > Forums > Design & Build > Parts  NXP BF862 warning

I got two batches (100 pcs. each) of BF862 low noise n-channel jfets, 
from two different providers (DigiKey Corp. | Electronic Components 
Distributor | United Kingdom Home Page and Mouser Electronics - 
Electronic Components Distributor). Both are 100% genuine NXP parts, the 
only difference being the origin. One batch is marked 2Aw (w stands for 
China) and the other 2Ap (p stands for Hong Kong).

While they both have the noise floor @100KHz as per the datasheet 
(~0.8nV/rtHz), the Chinese parts have significantly larger noise corner 
frenquency (~2KHz) compared to the HK parts (<500Hz). Therefore, the 
Cninese parts have about twice the noise of the HK parts, @1KHz. Devices 
in both batches have essentially the same average Idss of about 16mA.
======

I never got 2Ap parts, only 2Aw, have tried several sources.
Mine were closely centered around Idss=12 mA, 16 pcs. at 44mA total
deliver 10 dB below 1nV/rtHz (60 Ohm thermal) or abt 320 pV/rtHz.
I found a 1/f corner at 1.5 KHz which fits the cited text.

This is the test board: 16*BF862 or 2* IF3602 duals, Zetex cascode,
AD4898s for 80 dB from 0.1 Hz to 1MHz. Feedback to 0.25 Ohm source R,
neg. bias via 100 Meg to gate.

< https://www.flickr.com/photos/137684711@N07/ > , somewhere near
the top. I have bad cell phone reception at the moment and cannot
load the flickr page in finite time.

regards, Gerhard

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OT:  Qualcomm to send NXP to the chop shop Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2016-10-25 16:23 -0700
  Re: OT:  Qualcomm to send NXP to the chop shop Winfield Hill <hill@rowland.harvard.edu> - 2016-10-25 16:52 -0700
    Re: OT:  Qualcomm to send NXP to the chop shop Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2016-10-25 18:10 -0700
      Re: OT:  Qualcomm to send NXP to the chop shop Lasse Langwadt Christensen <langwadt@fonz.dk> - 2016-10-25 18:21 -0700
        Re: OT:  Qualcomm to send NXP to the chop shop Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2016-10-25 19:27 -0700
        Re: OT:  Qualcomm to send NXP to the chop shop Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2016-10-25 19:27 -0700
  Re: OT:  Qualcomm to send NXP to the chop shop Robert Latest <boblatest@yahoo.com> - 2016-10-29 17:14 +0000
    Re: OT:  Qualcomm to send NXP to the chop shop Winfield Hill <hill@rowland.harvard.edu> - 2016-10-29 11:12 -0700
    Re: OT:  Qualcomm to send NXP to the chop shop Winfield Hill <hill@rowland.harvard.edu> - 2016-10-29 11:41 -0700
      Re: OT:  Qualcomm to send NXP to the chop shop krw <krw@nowhere.com> - 2016-10-29 20:02 -0400
        Re: OT:  Qualcomm to send NXP to the chop shop Jasen Betts <jasen@xnet.co.nz> - 2016-10-30 00:47 +0000
        Re: OT:  Qualcomm to send NXP to the chop shop Robert Latest <boblatest@yahoo.com> - 2016-10-30 10:18 +0000
          Re: OT:  Qualcomm to send NXP to the chop shop Winfield Hill <hill@rowland.harvard.edu> - 2016-10-30 11:24 -0700
            Re: OT:  Qualcomm to send NXP to the chop shop Robert Latest <boblatest@yahoo.com> - 2016-11-01 19:04 +0000
              Re: OT:  Qualcomm to send NXP to the chop shop Winfield Hill <hill@rowland.harvard.edu> - 2016-11-02 09:20 -0700
                Re: OT:  Qualcomm to send NXP to the chop shop Robert Latest <boblatest@yahoo.com> - 2016-11-04 20:40 +0000
                Re: OT:  Qualcomm to send NXP to the chop shop Winfield Hill <hill@rowland.harvard.edu> - 2016-11-04 14:22 -0700
                Re: OT:  Qualcomm to send NXP to the chop shop Robert Latest <boblatest@yahoo.com> - 2016-11-07 18:01 +0000
                Re: OT: Qualcomm to send NXP to the chop shop Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2016-11-07 14:29 -0500
                Re: OT: Qualcomm to send NXP to the chop shop Robert Latest <boblatest@yahoo.com> - 2016-11-08 20:22 +0000
                Re: OT: Qualcomm to send NXP to the chop shop Gerhard Hoffmann <ghf@hoffmann-hochfrequenz.de> - 2016-11-09 09:27 +0100
                Re: OT: Qualcomm to send NXP to the chop shop Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2016-11-09 11:17 -0500
                Re: OT: Qualcomm to send NXP to the chop shop Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2016-11-09 11:27 -0500
                Re: OT: Qualcomm to send NXP to the chop shop Robert Latest <boblatest@yahoo.com> - 2016-11-09 19:46 +0000
                Re: OT: Qualcomm to send NXP to the chop shop JM <dontreplytothis173@gmail.com> - 2016-11-09 19:48 +0000
                Re: OT: Qualcomm to send NXP to the chop shop Gerhard Hoffmann <ghf@hoffmann-hochfrequenz.de> - 2016-11-11 00:09 +0100
                Re: OT: Qualcomm to send NXP to the chop shop Tom Gardner <spamjunk@blueyonder.co.uk> - 2016-11-11 09:35 +0000
                Re: OT: Qualcomm to send NXP to the chop shop JM <dontreplytothis173@gmail.com> - 2016-11-13 21:22 +0000
                Re: OT:  Qualcomm to send NXP to the chop shop Winfield Hill <hill@rowland.harvard.edu> - 2016-11-07 13:22 -0800
                Re: OT:  Qualcomm to send NXP to the chop shop Robert Latest <boblatest@yahoo.com> - 2016-11-08 20:11 +0000
    Re: OT: Qualcomm to send NXP to the chop shop Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2016-10-29 19:40 -0400

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