[Premium-Rx] WTB: Watkins Johnson 8940 Tempest Rx System

[Jeff Kruth]

Hi Raymond!


Good to hear from you. LOG detection is non-linear, logarithmic mode, usually calibrated in dB, like a spectrum analyzer. Remember, this is a calibrated measurement receiver as well as an intercept system. 
 
73
Jeff Kruth
WA3ZKR
 
 
In a message dated 5/24/2018 4:39:35 AM Eastern Standard Time, raymond.boute at pandora.be writes:

 
Dear Jeff,


Hopefully you are willing to answer a question from a non-buyer: wat 
is LOG mode reception?

73
Raymond ON4DBV

===========================================

At 10:34 2018-05-23, you wrote:
>Content-Transfer-Encoding: base64Hi Bruce!
>
>
>I have two of them and would part with one. They cost me a bit back 
>in the day. Complete system, desk and all, cables etc. I may even 
>have some documents for loan to copy. We can discuss the price. 
>Shipping would be by freight or you could pick it up. These were 
>functional units when I bought them, and have been in storage (in my 
>lab) ever since. Never got around to using them, so they have sat in 
>the corner. Not many were made, and at one point WJ had a sale for 
>one of mine to Denmark, as WJ did not want to build a one-off. It 
>was from this that I learned they were $300K. Did not come through. 
>This was back just at the time the Clinton Admin killed the Tempest 
>requirement.
>They are really quite the thing!
>
>73
>Jeff Kruth
>WA3ZKR
>
>In a message dated 5/22/2018 8:29:15 PM Eastern Standard Time, 
>ka2ivy at verizon.net writes:
>
>
>I happened upon a brochure for the Watkins-Johnson WJ-8940 receiver in
>
>the desk console. Has anyone seen one of these, and even more important,
>does anyone have a project one they are willing to part with? It looks
>like a neat rig, restoring one would be quite a project but that's the
>kind of puzzle and challenge I would like.
>
> Bruce Gentry, KA2IVY
>
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