Various units advertised as WJ-8691A systems have popped up on eBay in incomplete or gutted condition but I was lucky enough to get pictures of a complete system.
They appear to be programmed for some sort of cell phone intercept but the rumor mill has it that they can be programmed to receive multiple channels of anything between DC and 2 GHz with proper software and modules.
This unit has two 2GHz frequency extenders. An integral DAT drive might be for unattended logging of spectrum activity. Rumor also has it that the federal government forced auctions of these radios off eBay. These units will probably never be declassified. |
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WJ-8691A - The whole package
The full open view. The receiver is in the lower left section. The power supplies, battery and DAT tape drive are in the upper left & middle section. The two frequency extenders are in the upper section one above another on the right. To my knowledge, no private citizen has managed to get one of these units properly operating. Even though this unit was physically complete, it did not have any software or tape cartridges. The programming in the software is typically a higher security concern than the hardware. The software would reveal the nature of the surveillance mission.
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WJ-8691A
main receiver module
This is the front of the receiver. It has RS-232 and RS-422 ports for remote control and two SCSI interfaces for connection to external DAT drives.
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WJ-8691A
main
receiver inside
The inside of the receiver reveals what appear to be six independent receivers. Construction quality is, as usual, superb.
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WJ-8691A support modules
The support modules, from the top control unit, tape drive, DC to DC converter.
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WJ-8691A frequency extender module
One of the two frequency extenders. Extends the range of the receivers to 2 GHz.
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