75MHz Radio Frequency Checker

This is the DuraTrax 75MHz (channels 61-90) Radio Frequency Checker.

FEATURES: Automatically scans all thirty R/C frequencies in the 75MHz band and
identifies those frequencies in use
Each frequency is shown by a dedicated LED, LED showing channel in
use stays lit and unit continues to scan
300' (91m) range without external antenna, 1000' (305m) with external
antenna (not included-available separately) see COMMENTS
Pevents accidents due to unwanted Rf interference from other
modelers' radio equipment
Fits easily in pocket or car bag
One year limited warranty

INCLUDES: One 75MHz DuraTrax Radio Frequency Checker

REQUIRES: 3 AAA cells

SPECS: Dimensions: 3.14" x 0.94" x 2.36" (80 x 24 x 60mm)
Weight: 2.05oz (58g)
Input Voltage: 4.5V DC
Operational Current: 20-90mA
Frequency Identifiers: 30 red LEDs
Frequency Scan Time: 9 seconds
Max Operational Temperature: 32°-104°F (0°-40°C)

COMMENTS: For clearest reception and best performance do not sit frequency
checker on ground. Also do not aim transmitter antenna directly at
frequency checker, as transmitter's weakest signal emits directly
from the tip of its antenna.

This frequency checker indicates when another R/C transmitter is on a
particular channel. It's important to note that the frequency
checker is NOT well suited to show very brief, intermittent Rf
signals that could cause interference which may be present in the
environment near or between R/C channels.

When using the external antenna, extra channels might appear to be in
use if the checker is physically located very near a Tx which is
emitting a signal. Moving the checker several feet away from the
Tx should clear the problem. If used inside buildings which have a
lot of steel/metal in the structure, extra channels might
inadvertently be shown and NOT using the external antenna may
deliver the best results in this situation.

The instruction sheet incorrectly states that "Range is up to 300
meters w/o external antenna" and "Range is up to 1000 meters with
external antenna". INSTEAD of "meters" it should say "feet" in both
places.