Detector RFI, RF-204
© Brooke Clarke,
N6GCE 2002 - 2007
This is a Radio Frequency Interference detector that can
and isolate minute and intermittent sources of RF energy". This
be used as a piece of test equipment and it's rumored also as an RF bug
detector, although some testing does not support this using the stock
parts supplied. The probe is a tank circuit that's most sensitive
at about 26 MHz according to the manual.
The main unit contains the electronics
and has a belt clip. Inside is a 6 Volt Ni-Cad battery that can
be replaced by the Radio
Shack Catalog #: 23-338
which is a 6 V
1500 mah Ni-MH battery pack that can be shoehorned into the main unit.
To charge the battery pack there's a custom made wall wart with a
stnadard U.S. 3 prong mains plug and a cable to connect to the main
unit. A clue as to the use of this unit is the adapter cable that
has a standard U.S. mains 3 hole socket on one end and a mil spec plug
on the other end. The mil spec connector is marked MS 3106A
18-9P. It has two larger diameter pins that are longer than the 5
shorter pins. The mating sleeve is threaded.
What military equipment has the MS 310?A 18-0S Socket?
The Probe contains a parallel resonate LC circuit the has a narrow
impedance peak at 5.5 MHz and a broad impedance valley at 16.2
Mhz. Not the type of thing you would use for bug sniffing.
The coax cable is RG-174 with what I think is an SMC plug.
The headphones are Telex p/n 610-1 (GY-W) 13913-386-002-000-2 with a
standard 1/4" phone plug which probably also acts as the on-off switch.
Tapping rod is 0.265" dia x 6.5" long plastic.
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