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Tek built Interad SA

Glenn Little
 

Would there be any data available on a Tektronix built Interad 7121R spectrum analyzer?

Thanks
Glenn

--
-----------------------------------------------------------------------
Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI LM NRA LM SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"

Jeff Kruth
 

Hi Glenn!

Tek didnt build it, Interad did. They bought Tek scope MF's and modified them. I had one with the manual & sold it years ago. It is out there somewhere. The manual was about 4 inches thick in a blue vinyl binder from Interad. A lot of very large "blueprint" style schematics.
Jeff Kruth

In a message dated 4/20/2020 11:06:13 AM Eastern Standard Time, glennmaillist@... writes:
Would there be any data available on a Tektronix built Interad 7121R spectrum analyzer?
ThanksGlenn
-- -----------------------------------------------------------------------Glenn Little                ARRL Technical Specialist  QCWA  LM 28417Amateur Callsign:  WB4UIV            wb4uiv@...    AMSAT LM 2178QTH:  Goose Creek, SC USA (EM92xx)  USSVI LM  NRA LM  SBE ARRL TAPR"It is not the class of license that the Amateur holds but the classof the Amateur that holds the license"

Tom B
 

Hi Jeff,

Did Interad build anything that worked?

Tom

On 4/20/2020 11:15 AM, Jeff Kruth via groups.io wrote:
Hi Glenn!

Tek didnt build it, Interad did. They bought Tek scope MF's and modified them. I had one with the manual & sold it years ago. It is out there somewhere. The manual was about 4 inches thick in a blue vinyl binder from Interad. A lot of very large "blueprint" style schematics.
Jeff Kruth
In a message dated 4/20/2020 11:06:13 AM Eastern Standard Time, glennmaillist@... writes:
Would there be any data available on a Tektronix built Interad 7121R spectrum analyzer?
ThanksGlenn
-- -----------------------------------------------------------------------Glenn Little                ARRL Technical Specialist  QCWA  LM 28417Amateur Callsign:  WB4UIV            wb4uiv@...    AMSAT LM 2178QTH:  Goose Creek, SC USA (EM92xx)  USSVI LM  NRA LM  SBE

nonIonizing EMF
 

nonIonizing EMF
 

I'll read into some more and see what I can find.

Thinking I can update the Tekwiki?

What's everyone's thoughts regarding?

Anyone have any insight and details on this 7121R Interad Third Party system?

Seems like one of the 5000 series mainframes though I'm not seeing it like the D14 and looks more like the D11/5111, D13/5113 or D15/5115 look. http://w140.com/tekwiki/wiki/5000-series_scopes

Reminds me more of the Pacific Measurements D11 look. http://w140.com/tekwiki/wiki/Pacific_Measurements_1038

Ed Breya
 

It's just an old specialty type unit built as a plug-in for a Tek 7K storage mainframe. For the money they're asking, you could find a real, much better, and documented SA, in much better condition. BTW this is called a "receiver" not an SA, for good reason, if you look at the RBW.

I'd go as high as $20 for such a thing - if it came with free shipping - just out of curiosity. There's some intrinsic value if you need spare 7K parts. The most useful and valuable thing in the plug-in would be the step attenuator, but without knowing the frequency range or condition, it's a crapshoot.

I'd recommend not to bother with it, except to inform Kurt so it can be shown on tekwiki. If you need some parts, that's a different story, but the price is about 10-15 times too high.

Ed

Jeff Kruth
 

Hi Tom!

In my experience, no. It seems a shame, start with a (reasonably) good concept, buy high quality parts, do all the front panel work, etc. = rubbish.
Got a chuckle from your question.
Best Regards,Jeff

In a message dated 4/20/2020 5:56:26 PM Eastern Standard Time, tbryan@... writes:
Hi Jeff,

Did Interad build anything that worked?

Tom

Gary Robert Bosworth
 

What is SA???



On Mon, Apr 20, 2020, 20:42 Jeff Kruth via groups.io <kmec=aol.com@groups.io>
wrote:

Hi Tom!

In my experience, no. It seems a shame, start with a (reasonably) good
concept, buy high quality parts, do all the front panel work, etc. =
rubbish.
Got a chuckle from your question.
Best Regards,Jeff

In a message dated 4/20/2020 5:56:26 PM Eastern Standard Time,
tbryan@... writes:
Hi Jeff,

Did Interad build anything that worked?

Tom



Jeff Kruth
 

SA = Spectrum Analyzer

In a message dated 4/20/2020 11:58:02 PM Eastern Standard Time, @grbosworth writes:
What is SA???



On Mon, Apr 20, 2020, 20:42 Jeff Kruth via groups.io <kmec=aol.com@groups.io>
wrote:

Hi Tom!

In my experience, no. It seems a shame, start with a (reasonably) good
concept, buy high quality parts, do all the front panel work, etc. =
rubbish.
Got a chuckle from your question.
Best Regards,Jeff

In a message dated 4/20/2020 5:56:26 PM Eastern Standard Time,
tbryan@... writes:
Hi Jeff,

Did Interad build anything that worked?

Tom



nonIonizing EMF
 

On Mon, Apr 20, 2020 at 06:35 PM, Ed Breya wrote:


I'd recommend not to bother with it, except to inform Kurt so it can be shown
on tekwiki.
Thanks for the feedback as I saw where made and was thinking surveillance use as Jeff noted in his message.

I'll message the seller to verify it's OK to use the images and update the Tekwiki accordingly.

nonIonizing EMF
 

On Mon, Apr 20, 2020 at 10:37 PM, nonIonizing EMF wrote:


I'll message the seller to verify it's OK to use the images and update the
Tekwiki accordingly.
Received the OK to use the eBay listing photos, created the Interad 7121R wiki page ( http://w140.com/tekwiki/wiki/Interad_7121R ) and updated the Third Party Tek 5000 Series Scopes wiki page accordingly.