Antenna/Block Reference Table - Lectrosonics UCR411A Instruction Manual

Antenna/Block Reference Table

The A8U whip UHF whip antenna supplied with the receiver is factory cut to a specific frequency block as shown in
the table below. A colored cap and label are used on blocks 21 through 29, and a black cap and label are used on the
other blocks to denote the frequency range of each model.
The chart is useful for fabricating an antenna from coaxial cable or other materials, or for identifying the frequency of
an antenna that is not marked. The lengths shown are specifically for the A8U whip antenna with a BNC connector, as
determined by measurements with a network analyzer. The optimal length of the element in other designs will likely be
different than those shown in this table, but since the bandwidth is typically wider than the specified block, the exact
length is not critical for useful performance in whip, dipole and coaxial designs.
Note: Not all
Lectrosonics
products are
built on all of the
blocks covered
in this chart.
Cut top of colored cap
to make a colored sleeve
Rio Rancho, NM
BLOCK FREQUENCY
RANGE
470 470.100 - 495.600
19 486.400 - 511.900
20 512.000 - 537.500
21 537.600 - 563.100
22 563.200 - 588.700
23 588.800 - 614.300
606 606.000 - 631.500
24 614.400 - 639.900
25 640.000 - 665.500
26 665.600 - 691.100
27 691.200 - 716.700
28 716.800 - 742.300
29 742.400 - 767.900
30 768.000 - 793.500
31 793.600 - 819.100
32 819.200 - 844.700
33 844.800 - 861.900
Whip Length
Note: This line should be 6.00" long.
UHF Digital Hybrid Wireless™ Receiver
CAP ANTENNA
COLOR WHIP LENGTH
Black w/ Label 5.47"
Black w/ Label 5.19"
Black w/ Label 4.95"
Brown 4.73"
Red 4.47"
Orange 4.23"
(Use Block 24) 4.00"
Yellow 4.00"
Green 3.80"
Blue 3.61"
Violet (Pink) 3.46"
Grey 3.31"
White 3.18"
Black w/ Label 3.08"
Black w/ Label 2.99"
Black w/ Label 2.92"
Black w/ Label 2.87"
Frequency Blocks
Colored cap
19