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

[Peter Gottlieb]

Also it is usually best to have pan adapters, which many WJ receivers have, set to log scale. 


Peter

> On May 24, 2018, at 11:30 AM, Jeff Kruth via Premium-Rx <premium-rx at mailman.qth.net> wrote:
> 
> 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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