Technical Surveillance and Counter Measures
In the 1990s I was under contract with an "agency" to develop a portable receiving system that covered "DC to
Daylight." This field unit ended up being an Icom PCR-1000, a serial port data communications monitor, a lap top
computer, PSUs, a battery pack with vehicle ports for 12 VDC, and four antenna ports for VLF, HF, VHF, and UHF.
This is the original prototype case. Not shown are the 4 BNC antenna ports and the strap-in battery pack which
resided in the cover of the case along with 2 PSUs for the computer and PCR-1000.
Closeup of the system.
Thanks to Icom, there
really isn't much to it. The
only engineering that had
to be done was to build the
data monitor and design
the 2 antennas for
Above is the serial data communications monitor. It shows the send
and receive status of the data strings and the state of the Icom's
At left is a loop directional antenna originally designed for the Ham
2-meter band, now modified for the commercial marine band. Maybe
used to catch drug runners in their speed boats - or maybe drunk
fishermen on Labor Day...dunno. Where's 007?
Right: A UHF highly directional 9-element
Yagi. Solid brass construction, this model
was an experimental folded dipole version
that can be tuned to cover a broader range
of frequencies than a standard Yagi which
uses a dipole feed.