[Test-Equipment] LF Ailtech 7514 and noise sorce

[Chris Trask]

    I bought a few 5722's at a junk yard years ago, intending to build my
own noise source base on an article in QST from the 1950's (?).  Then I got
the GR-1383 and set the noise source project aside.


Chris

     ,----------------------.       High Performance Mixers and
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   / extinct stuff, anyhow?  /
   \  _______,--------------'           Chris Trask / N7ZWY
  _ |/                                  Principal Engineer
 oo\                                  Sonoran Radio Research
(__)\       _                             P.O. Box 25240
  \  \    .'  `.                     Tempe, Arizona 85285-5240
   \  \  /      \
    \  '"        \                 IEEE Senior Member #40274515
     .       (  ) \
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        | |  | | \  '.       http://www.home.earthlink.net/~christrask
       c__; c__;  '-..'>.__

                       Graphics by Loek Frederiks

----- Original Message -----
From: "Brooke Clarke" <brooke at pacific.net>
To: "Discussion of Electronic Test Equipment"
<test-equipment at mailman.qth.net>
Sent: Sunday, December 23, 2007 2:51 PM
Subject: Re: [Test-Equipment] LF Ailtech 7514 and noise sorce


> Hi Chris:
>
> The 5722 tube was designed to generate noise from DC through 500 Mhz, see:
> http://www.prc68.com/I/NSLB.shtml
>
> The other way is to use a zener or better a noise diode.
>
> The advantage of the 5722 is the noise is a function of the plate current.
>
> Have Fun,
>
> Brooke Clarke
> http://www.PRC68.com
> http://www.precisionclock.com
> http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam
>
>
> Chris Trask wrote:
> > Ed,
> >     What frequency range?  For HF I use a General Radio 1383 noise
> > generator, an HP-141T spectrum analyzer, a homebrew 30dB amplifier, and
a
> > 3dB pad.  Works well as long as you're measuring a NF of 3dB or higher.
> >
> >   I have an Ailtech 75 PANFI and an Ailtech 136 precision receiver, but
no
> > low frequency noise source to go with them.
> >
> > Chris
> >
> >      ,----------------------.       High Performance Mixers and
> >     /    What's all this     \    Amplifiers for RF Communications
> >    / extinct stuff, anyhow?  /
> >    \  _______,--------------'           Chris Trask / N7ZWY
> >   _ |/                                  Principal Engineer
> >  oo\                                  Sonoran Radio Research
> > (__)\       _                             P.O. Box 25240
> >   \  \    .'  `.                     Tempe, Arizona 85285-5240
> >    \  \  /      \
> >     \  '"        \                 IEEE Senior Member #40274515
> >      .       (  ) \
> >       '-| )__| :.  \              Email: christrask at earthlink.net
> >         | |  | | \  '.       http://www.home.earthlink.net/~christrask
> >        c__; c__;  '-..'>.__
> >
> >                        Graphics by Loek Frederiks
> >
> > ----- Original Message -----
> > From: "Edward J White" <wa3bzt at verizon.net>
> > To: "Test Equipment" <Test-Equipment at mailman.qth.net>
> > Sent: Sunday, December 23, 2007 1:51 PM
> > Subject: [Test-Equipment] LF Ailtech 7514 and noise sorce
> >
> >
> >
> >>Hi Gang: Anybody have a Noise system that works for sale Not looking for
> >>something to expensive.
> >>Ed
> >>WA3BZY
> >>______________________________________________________________
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> >>
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> >
> > 2:02 PM
> >
> >>
> >
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