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Old January 11th 06, 09:20 PM posted to rec.radio.amateur.homebrew,sci.electronics.design
John Larkin
 
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Default Zener Noise (was: 1N4007 varactors)

On Wed, 11 Jan 2006 14:53:07 -0600, "Tim Williams"
wrote:

"John Larkin" wrote in message
news
Old vintage noise figure meters used gas tubes. And I think there was
a pencil tube that mounted in a waveguide and made shot noise.


I've got a gaussian noise generator, some SS in the power supply, tubes
everywhere else, found it on the curb and apparently works. Uses a pair of
6D4 thyratrons in magnetic fields for the noise.

Tim

GR?

John

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Old January 11th 06, 11:00 PM posted to rec.radio.amateur.homebrew,sci.electronics.design
Tim Williams
 
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Default Zener Noise (was: 1N4007 varactors)

"John Larkin" wrote in message
...
I've got a gaussian noise generator, ...


GR?


Come again?

Tim

--
Deep Fryer: a very philosophical monk.
Website: http://webpages.charter.net/dawill/tmoranwms


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Old January 11th 06, 11:47 PM posted to rec.radio.amateur.homebrew,sci.electronics.design
Mike Andrews
 
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Default Zener Noise

In rec.radio.amateur.homebrew Tim Williams wrote:
"John Larkin" wrote in message
...
I've got a gaussian noise generator, ...


GR?


Come again?


When I see "GR", I think "General Radio", and salivate gently. They
made some really, really nice test gear.

--
Mike Andrews, W5EGO

Tired old sysadmin
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Old January 12th 06, 12:11 AM posted to rec.radio.amateur.homebrew,sci.electronics.design
Jim Thompson
 
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Default Zener Noise

On Wed, 11 Jan 2006 23:47:37 +0000 (UTC), "Mike Andrews"
wrote:

In rec.radio.amateur.homebrew Tim Williams wrote:
"John Larkin" wrote in message
...
I've got a gaussian noise generator, ...

GR?


Come again?


When I see "GR", I think "General Radio", and salivate gently. They
made some really, really nice test gear.


And then let themselves get sucked, by marketing, into large
mainframe-based testers, and lost their ass.

I watched the money-making portable test division in Phoenix get
trashed by the ****-heads in Massachusetts... now you know _part_ of
the source of my animosity toward Massa2****s ;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
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Old January 12th 06, 01:52 AM posted to rec.radio.amateur.homebrew,sci.electronics.design
Winfield Hill
 
Posts: n/a
Default Zener Noise

Jim Thompson wrote...

I watched the money-making portable test division in Phoenix
get trashed by the ****-heads in Massachusetts... now you know
_part_ of the source of my animosity toward Massa2****s ;-)


That's an amazing extension. Plenty of healthy Massachusetts
companies have been sucked dry by their out-of-state owners.
Obviously the ability to mis-manage a company from a distance
is not notably a Massachusetts sin, unless you're obsessed with
the Harvard Business School's modest influence on the issue.


--
Thanks,
- Win


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Old January 12th 06, 03:20 AM posted to rec.radio.amateur.homebrew,sci.electronics.design
John Larkin
 
Posts: n/a
Default Zener Noise

On 11 Jan 2006 17:52:16 -0800, Winfield Hill
wrote:

Jim Thompson wrote...

I watched the money-making portable test division in Phoenix
get trashed by the ****-heads in Massachusetts... now you know
_part_ of the source of my animosity toward Massa2****s ;-)


That's an amazing extension. Plenty of healthy Massachusetts
companies have been sucked dry by their out-of-state owners.
Obviously the ability to mis-manage a company from a distance
is not notably a Massachusetts sin, unless you're obsessed with
the Harvard Business School's modest influence on the issue.


It is sadly true that many of the old-line Rt 128 companies are
gone... DEC, Data General, GR, Sensitive Instruments, Clevite,
Transitron, probably others. Have others popped up to take their
place? Analog Devices, for sure.

John

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Old January 12th 06, 04:04 PM posted to rec.radio.amateur.homebrew,sci.electronics.design
Allodoxaphobia
 
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Default Zener Noise

On Wed, 11 Jan 2006 19:20:09 -0800, John Larkin wrote:

It is sadly true that many of the old-line Rt 128 companies are
gone... DEC, Data General, GR, Sensitive Instruments, Clevite,
Transitron, probably others.


Have others popped up to take their place?


Why sure. Can you red Chinese tech manuals?
  #8   Report Post  
Old January 12th 06, 03:44 PM posted to rec.radio.amateur.homebrew,sci.electronics.design
Winfield Hill
 
Posts: n/a
Default Zener Noise

John Larkin wrote...

Winfield Hill wrote:

Jim Thompson wrote...

I watched the money-making portable test division in Phoenix
get trashed by the ****-heads in Massachusetts... now you know
_part_ of the source of my animosity toward Massa2****s ;-)


That's an amazing extension. Plenty of healthy Massachusetts
companies have been sucked dry by their out-of-state owners.
Obviously the ability to mis-manage a company from a distance
is not notably a Massachusetts sin, unless you're obsessed with
the Harvard Business School's modest influence on the issue.


It is sadly true that many of the old-line Rt 128 companies are
gone... DEC, Data General, GR, Sensitive Instruments, Clevite,
Transitron, probably others. Have others popped up to take their
place? Analog Devices, for sure.


We have scads of large wealthy "newer" high-tech companies
headquartered here, that you may not often hear of, like
Thermo Electron, Bruker, Summit Technology, EMC, etc., and
others you do know, with a substantial presence, like Agilent.

Many software and Internet companies are headquartered in MA,
like Peoplesoft, Novell, etc., and many others have a large
presence, like Sun, Red Hat, IBM, Microsoft, etc.

We all know scores of top-tier biotech companies with their
headquarters in MA, who have massive high-tech employment here.


--
Thanks,
- Win
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Old January 12th 06, 03:03 AM posted to rec.radio.amateur.homebrew,sci.electronics.design
Tim Williams
 
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Default Zener Noise

"Mike Andrews" wrote in message
...
I've got a gaussian noise generator, ...

GR?


When I see "GR", I think "General Radio", and salivate gently. They
made some really, really nice test gear.


Ah, had a feeling it was something about a manufacturer...

Unfortunately(?) no, it appears to be Elgenco, and I also now remember not
finding much info on this device after I picked it up. It's a rack mount
unit BTW.

Tim

--
Deep Fryer: a very philosophical monk.
Website: http://webpages.charter.net/dawill/tmoranwms


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Old January 12th 06, 12:30 AM posted to rec.radio.amateur.homebrew,sci.electronics.design
John Larkin
 
Posts: n/a
Default Zener Noise (was: 1N4007 varactors)

On Wed, 11 Jan 2006 17:00:09 -0600, "Tim Williams"
wrote:

"John Larkin" wrote in message
.. .
I've got a gaussian noise generator, ...


GR?


Come again?

Tim


Is it a General Radio noise generator? I have an old GR noise
generator, and the manual talks about moving the magnet around to
optimize something.

John



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