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LPB Communications, Inc.
ATU-20 Antenna Tuning Unit
The ATU-20 is used for antenna applications as a lightning arrestor and to correct impedance mismatches. Most
center-loaded antennas have an impedance less than 50 ohms, so the ATU-20 functions perfectly to match the
transmitter’s 50 ohm output to the antenna’s input.
Specifications
Power Input
20
Watts
RMS
maximum
Input Impedence
50 ohms unbalanced
Output Impedance
into 50 ohms in 15 range switch built-in capacitance decades
Matching Circuit
Two staged, multifilar wound ferrite transformers
Metering
VSWR
bridge,
forward
and
reflected
readings
AC Line Connection
500Y
maximum,
line
to
line
and
ground
Size
12
“
H,
11”
W,
6.5”
D
Weight 7.5 lbs
WARRANTY
LPB Communications, Inc., warrants this equipment to be free from defects in materials and workmanship for a
period of one (1) year after purchase.
This warranty extends to first users of the product and future owners who purchase the product within the warranty
period.
The terms of this warranty are null and void if this product is stored or operated in an environment not conducive
to electronic equipment, or shows signs of misuse or modifications which affect the proper functioning of the
product. This warranty does not apply to damage caused by fire, smoke, flood, lightning, or acts of nature and
physical abuse.
LPB Communications, Inc., and its associated companies, authorized distributors, and personnel are not liable for loss of
revenues or other damages, or effects to the broadcast signal quality or coverage which may result from the from the improper
functioning of this product.