Groups > sci.electronics.design > #450666

Re: RF bipolars RIP

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From	Joerg <news@analogconsultants.com>
Newsgroups	sci.electronics.design
Subject	Re: RF bipolars RIP
Date	Tue, 07 Mar 2017 11:16:54 -0800
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On 2017-03-07 11:06, John Larkin wrote:
> On Tue, 07 Mar 2017 09:33:07 -0800, Joerg <news@analogconsultants.com>
> wrote:
>
>> On 2017-03-07 09:15, Phil Hobbs wrote:
>>> On 03/07/2017 11:08 AM, John Larkin wrote:
>>>> On Tue, 7 Mar 2017 10:17:56 -0500, Phil Hobbs
>>>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>>>>
>>>>> On 03/06/2017 11:44 PM, John Larkin wrote:
>>
>>
>> [...]
>>
>>
>>>>>> Same issue as the phemts: fast discretes are disappearing.
>>>>>>
>>>>>>
>>>>>
>>>>> I ordered a reel of BFG403s (basically a 17-GHz BFT25A), which are on
>>>>> LTB, and am plotting to get some SKY65050s, ATF38143s, ATF55143s,
>>>>> BFP640s, BFP650s, BFU520As, and a few others that are still apparently
>>>>> in production.  Ties up a few $k in inventory, but preserves freedom of
>>>>> action and possibly future competitive advantage.
>>>>
>>>> It's rude of people to not make p-channel phemts.
>>>
>>> Tubes have a similar problem, for similar reasons. ;)
>>>
>>
>> However, tubes have a staunch constituency and the Russians and Chinese
>> have figured out how to cash in.
>>
>> http://www.thetubestore.com/Tubes/6L6-5881-Tube-Types/Svetlana-6L6GC
>>
>> Even very cool looking ones:
>>
>> http://psvanetube.com/wordpress/store/products/treasure-globe-6sn7-se-pair-gf-limited-special-edition/
>>
>> I had a bet going with a boss in the 80's that our ultrasound Doppler
>> units could have already been built very economically in WW-II and
>> before, with tubes. He didn't believe it. When I gradually retire I
>> could build such a machine. Got the tubes, sockets and stuff. Problem
>> is, neither of us has cardiovascular issues so we don't really need it.
>> Also, the only way to build such a device would be with highly polished
>> wood and brass as an enclosure.
>
> Black wrinkle finish, engraved and filled lettering.
>

Or rhinestone lettering :-)


> Geez, there was some ugly gear back when. The Tek 530-series scopes
> were a stunning style breakthrough.
>

Aren't those with the tantalum issues? I don't mind an ugly unit that 
works for decades. Also, my 7704A ain't that bad-looking. Now the power 
supply goes zzzt at times but it's around 30 years old.

-- 
Regards, Joerg

http://www.analogconsultants.com/

Thread

RF bipolars RIP John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-06 16:51 -0800
  Re: RF bipolars RIP Winfield Hill <hill@rowland.harvard.edu> - 2017-03-06 18:01 -0800
    Re: RF bipolars RIP Gerhard Hoffmann <ghf@hoffmann-hochfrequenz.de> - 2017-03-07 03:19 +0100
      Re: RF bipolars RIP John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-06 18:25 -0800
        Re: RF bipolars RIP George Herold <gherold@teachspin.com> - 2017-03-06 19:03 -0800
        Re: RF bipolars RIP Winfield Hill <hill@rowland.harvard.edu> - 2017-03-06 19:11 -0800
          Re: RF bipolars RIP John Larkin <jjlarkin@highlandtechnology.com> - 2017-03-06 20:40 -0800
        Re: RF bipolars RIP Joerg <news@analogconsultants.com> - 2017-03-07 07:28 -0800
      Re: RF bipolars RIP Winfield Hill <hill@rowland.harvard.edu> - 2017-03-06 18:31 -0800
        Re: RF bipolars RIP John Larkin <jjlarkin@highlandtechnology.com> - 2017-03-06 20:44 -0800
          Re: RF bipolars RIP Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-03-07 10:17 -0500
            Re: RF bipolars RIP John Larkin <jjlarkin@highlandtechnology.com> - 2017-03-07 08:08 -0800
              Re: RF bipolars RIP Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-03-07 12:15 -0500
                Re: RF bipolars RIP John Larkin <jjlarkin@highlandtechnology.com> - 2017-03-07 09:30 -0800
                Re: RF bipolars RIP Joerg <news@analogconsultants.com> - 2017-03-07 09:33 -0800
                Re: RF bipolars RIP Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-03-07 12:44 -0500
                Re: RF bipolars RIP Cursitor Doom <curd@notformail.com> - 2017-03-07 17:53 +0000
                Re: RF bipolars RIP Joerg <news@analogconsultants.com> - 2017-03-07 10:59 -0800
                Re: RF bipolars RIP John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-07 11:06 -0800
                Re: RF bipolars RIP Joerg <news@analogconsultants.com> - 2017-03-07 11:16 -0800
                Re: RF bipolars RIP "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-03-07 15:11 -0600
                Re: RF bipolars RIP John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-07 14:30 -0800
                Re: RF bipolars RIP George Herold <gherold@teachspin.com> - 2017-03-07 15:47 -0800
                Re: RF bipolars RIP George Herold <gherold@teachspin.com> - 2017-03-07 15:55 -0800
                Re: RF bipolars RIP Sjouke Burry <burrynulnulfour@ppllaanneett.nnll> - 2017-03-08 11:50 +0100
                Re: RF bipolars RIP John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-07 16:36 -0800
                Re: RF bipolars RIP pcdhobbs@gmail.com - 2017-03-08 04:40 -0800
                Re: RF bipolars RIP George Herold <gherold@teachspin.com> - 2017-03-08 06:24 -0800
                Re: RF bipolars RIP dplatt@coop.radagast.org (Dave Platt) - 2017-03-07 16:55 -0800
                Re: RF bipolars RIP George Herold <gherold@teachspin.com> - 2017-03-08 06:40 -0800
                Re: RF bipolars RIP Piotr Wyderski <no@mail.com> - 2017-03-09 07:10 +0100
                Re: RF bipolars RIP dplatt@coop.radagast.org (Dave Platt) - 2017-03-10 21:32 -0800
                Re: RF bipolars RIP "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-03-07 22:57 -0600
            Re: RF bipolars RIP, grab em while you can Winfield Hill <hill@rowland.harvard.edu> - 2017-03-09 04:05 -0800
              Re: RF bipolars RIP, grab em while you can pcdhobbs@gmail.com - 2017-03-09 04:44 -0800
          Re: RF bipolars RIP Cursitor Doom <curd@notformail.com> - 2017-03-07 17:50 +0000
            Re: RF bipolars RIP John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-07 11:08 -0800
              Re: RF bipolars RIP John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-07 11:09 -0800
                Re: RF bipolars RIP Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-03-07 14:34 -0500
                Re: RF bipolars RIP Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-03-07 15:40 -0500
                Re: RF bipolars RIP Cursitor Doom <curd@notformail.com> - 2017-03-07 20:41 +0000
                Re: RF bipolars RIP John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-07 13:08 -0800
                Re: RF bipolars RIP "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-03-07 15:14 -0600
                Re: RF bipolars RIP Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-03-07 16:17 -0500
                Re: RF bipolars RIP "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-03-07 23:09 -0600
                Re: RF bipolars RIP John Larkin <jjlarkin@highlandtechnology.com> - 2017-03-07 21:34 -0800
                Re: RF bipolars RIP "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-03-08 14:24 -0600
                Re: RF bipolars RIP John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-08 13:10 -0800
                Re: RF bipolars RIP "Michael A. Terrell" <mike.terrell@earthlink.net> - 2017-03-09 14:19 -0500
                Re: RF bipolars RIP Cursitor Doom <curd@notformail.com> - 2017-03-09 22:10 +0000
                Re: RF bipolars RIP Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-03-10 11:50 -0500
                Re: RF bipolars RIP Cursitor Doom <curd@notformail.com> - 2017-03-10 17:27 +0000
                Re: RF bipolars RIP Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-03-10 12:52 -0500
                Re: RF bipolars RIP Cursitor Doom <curd@notformail.com> - 2017-03-10 19:01 +0000
                Re: RF bipolars RIP Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-03-10 15:19 -0500
                Re: RF bipolars RIP Cursitor Doom <curd@notformail.com> - 2017-03-10 21:42 +0000
                Re: RF bipolars RIP Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-03-10 17:52 -0500
                Re: RF bipolars RIP Cursitor Doom <curd@notformail.com> - 2017-03-10 23:38 +0000
                Re: RF bipolars RIP pcdhobbs@gmail.com - 2017-03-10 17:38 -0800
                Re: RF bipolars RIP Cursitor Doom <curd@notformail.com> - 2017-03-11 10:23 +0000
                Re: RF bipolars RIP pcdhobbs@gmail.com - 2017-03-11 03:30 -0800
                Re: RF bipolars RIP Cursitor Doom <curd@notformail.com> - 2017-03-11 12:50 +0000
                Re: RF bipolars RIP Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-03-11 10:49 -0500
                Re: RF bipolars RIP Cursitor Doom <curd@notformail.com> - 2017-03-11 15:55 +0000
                Re: RF bipolars RIP "tom" <tmiller11147@verizon.net> - 2017-03-11 11:45 -0500
                Re: RF bipolars RIP Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-03-11 16:50 -0500
                Re: RF bipolars RIP John Larkin <jjlarkin@highlandtechnology.com> - 2017-03-11 08:58 -0800
                Re: RF bipolars RIP Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-03-11 16:52 -0500
                Re: RF bipolars RIP George Herold <gherold@teachspin.com> - 2017-03-10 18:08 -0800
                Re: RF bipolars RIP John Larkin <jjlarkin@highlandtechnology.com> - 2017-03-11 07:47 -0800
                Re: RF bipolars RIP Cursitor Doom <curd@notformail.com> - 2017-03-11 15:56 +0000
                Re: RF bipolars RIP John Larkin <jjlarkin@highlandtechnology.com> - 2017-03-11 09:02 -0800
                Re: RF bipolars RIP "Michael A. Terrell" <mike.terrell@earthlink.net> - 2017-03-10 13:28 -0500
                Re: RF bipolars RIP pcdhobbs@gmail.com - 2017-03-08 04:35 -0800
                Re: RF bipolars RIP Joerg <news@analogconsultants.com> - 2017-03-07 14:05 -0800
                Re: RF bipolars RIP John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-07 14:33 -0800
                Re: RF bipolars RIP George Herold <gherold@teachspin.com> - 2017-03-07 15:40 -0800
                Re: RF bipolars RIP John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-07 16:44 -0800
                Re: RF bipolars RIP Mikko OH2HVJ <mikko.syrjalahti@nospam.fi> - 2017-03-08 10:19 +0200
                Re: RF bipolars RIP Winfield Hill <hill@rowland.harvard.edu> - 2017-03-08 04:30 -0800
                Re: RF bipolars RIP Mikko OH2HVJ <mikko.syrjalahti@nospam.fi> - 2017-03-08 15:38 +0200
    Re: RF bipolars RIP Robert Baer <robertbaer@localnet.com> - 2017-03-09 23:50 -0800
      Re: RF bipolars RIP pcdhobbs@gmail.com - 2017-03-10 05:39 -0800
      Re: RF bipolars RIP John Larkin <jjlarkin@highlandtechnology.com> - 2017-03-10 07:15 -0800
  Re: RF bipolars RIP "Kevin Aylward" <kevinRemovAT@kevinaylward.co.uk> - 2017-03-07 21:55 +0000
    Re: RF bipolars RIP Joerg <news@analogconsultants.com> - 2017-03-07 14:10 -0800
    Re: RF bipolars RIP John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-07 14:43 -0800
  Re: RF bipolars RIP Tim Wescott <tim@seemywebsite.really> - 2017-03-10 23:54 -0600
    Re: RF bipolars RIP pcdhobbs@gmail.com - 2017-03-11 04:32 -0800
    Re: RF bipolars RIP John Larkin <jjlarkin@highlandtechnology.com> - 2017-03-11 07:54 -0800
      Re: RF bipolars RIP krw@notreal.com - 2017-03-11 11:15 -0500
        Re: RF bipolars RIP John Larkin <jjlarkin@highlandtechnology.com> - 2017-03-11 09:17 -0800
          Re: RF bipolars RIP "tom" <tmiller11147@verizon.net> - 2017-03-11 15:11 -0500
            Re: RF bipolars RIP John Larkin <jjlarkin@highlandtechnology.com> - 2017-03-11 14:22 -0800
              Re: RF bipolars RIP "tom" <tmiller11147@verizon.net> - 2017-03-11 21:11 -0500
          Re: RF bipolars RIP krw@notreal.com - 2017-03-11 21:04 -0500

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