[Premium-Rx] WJ-8940B

[John P Ceresole]

>
>Hi List Members
>
>I am downsizing this year and am looking for a good home for 
>receivers which are straight out of our cold war heritage.
>
>I have 4 off WJ-8940B Receivers.
>
>#52 can tune from 20 Hz to 18 GHz, the details are on Terry 
>O'Laughlin's Website 
>http://watkins-johnson.terryo.org/Documents/Manufacturers/WJ/Data%20sheets/WJ-8940B%20data-sheet.pdf. 
>However this one is the full most capable monty as it also has an 
>ELF extender unit 20 Hz to 10 kHz and an MX extender 1-18 GHz.  It 
>has t he NBIF Unit allowing 5 Hz, 10 Hz, 20 Hz, 50 Hz and 100 Hz 
>centred on a 100 kHz IF and the Wideband Demodulator - WBD which 
>allows IF Bandwidths of 100 MHz, 200 MHz and 500 MHz.centred on 2175 
>MHz. The X-Y plotter feature is no longer functional and has been 
>replaced by a GP-IB IEEE 488 interface which used to speak with a PC 
>DOS based software package called PATS
>
>It also has the updated auxiliary synthesiser which allows a 
>frequency accuracy of 1 in 10e10 or 1 Hz in 10 GHz or better. It 
>will also come with a WJ-9403A 21.4 MHz Pan-adaptor with new 
>tube.  There will also be an HP storage display X-Y monitor but have 
>never used this so don't know if that aspect works.
>
>Below tuned frequency of 10 MHz it uses a first IF of 21.4 MHz and 
>above it uses a first IF of 2175 MHz
>
>It is quite a receiver and is rather large and has a WJ cabinet, all 
>leads and all documentation.
>
>It may be possible to get hold of the full height double bay cabinet 
>that #52 originally came in (It was given to a museum with a space 
>model of the receiver so they may still have it and may be willing 
>to exchange for the 1 and one 1/2 shown on Terry's website..
>
>Part of the package will also include #50 which is identical but 
>needs a fair bit of TLC.  It has worked within the last 5 years but 
>the reference frequency module of it's MX Unit needs looking at as 
>it's PLL is known  not working.
>
>I have 2 others of unknown status which will also come as part of the package
>
>Shipping this little lot.  Mmmh! it would cost a small fortune to the US.
>
>II would be willing to help the acquirer with my knowledge of the 
>system as I used to use these in anger and have also maintained 
>them.  Fortunately they are based on technology which most of us 
>(well the middle-aged and above) understand and have grown up with.
>
>If anyone is interested, please contact me off-list
>
>Best wishes to you all
>
>John G8 BSD

John P Ceresole MIET
Consultant/Owner

Associated TEMPEST and EMC Services Ltd

Companies House Company Number 6939069

TEMPEST and Electromagnetic Compatibility Consultants

TEMPEST/EMC Consultancy/Test and Control/Test Plans for Equipment and 
Installations from PCs to 5,000 occupant Buildings.

73 Western Way,
Alverstoke,
Gosport,
Hampshire, PO12 2NF,
United Kingdom

Fax/Tel +44 (0) 2392 528540 (Please ring before faxing)
Mob Phone +44 (0) 7979 503650