[GreenKeys] Watkins Johnson FSK converter on 'bay...

[Bob Camp]

Hi

Best bet on the IF's would be 10.7 or 21.4 MHz. Of course it could be 
almost anything from 455 KHz through 70 MHz.

Judging only by the option tag on the rear panel it's set up for 
IEEE-488 rather than RS-232. Since there are BNC's labeled data 1 and 
data 2 it's not clear quite what that means. Best guess would be +/- 5 
volt output on the BNC's - just like the Tempest Dovetrons.

A *very* cool looking piece of gear. Without a manual who knows what 
you can or can't do with it. Since the serial numbers are in the 800's 
on some of the modules at least there is a chance that a manual exists 
out there.

I have bought enough stuff from AST (like half the basement) to pretty 
well know what their "checked ok" status is. The unit fires up and the 
lights and knobs do what you would expect if you never saw one before. 
Checking the 488 interface is a bit past what they normally do. I have 
never regretted any of the deals I have had with them, I just don't pay 
an enormous amount of money for the stuff I buy from them.

AST's normal selling pattern is to list something like this a couple of 
times at a high price and then start cutting it pretty steeply. Who 
knows if it will go for $1000 or $10.

	Take Care!

		Bob Camp
		KB8TQ

On Dec 19, 2004, at 7:30 PM, Roy Morgan wrote:

> At 01:52 AM 12/31/2004 -0500, Dave Emery wrote:
>>         I have nothing to do with the seller, but noticed a 80s SIGINT
>> grade WJ HF FSK converter with a fancy scope display as Item 
>> 3863916556.
>>
>>         Dual diversity...
>
> Dave,
>
> Mighty fancy but, being ignorant about most W-J, I wonder:
>
> - What does it accept as inputs?  RF? IF - what frequency?
> - Does it drive RS-232 type output, or 60 ma loop?  What?
>
> I do have one W-J (CEI) receiver here, a vlf unit: VLF-354.  It has 
> the tape readout, covers from a few kc up to 600 kc, and has an IF of 
> 2 mc.  I am looking for a manual for this one.  I do have a manual for 
> the 357 which is very similar (has nixie readout).
>
> Roy
>
>
> Roy Morgan
> K1LKY since 1959
> 7130 Panorama Drive, Derwood MD 20855
> 301-330-8828 home .... 301-975-3254 work
> roy.morgan at nist.gov
>
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