Lectrosonics UCR411a User Manual Page 19

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UHF Digital Hybrid Wireless™ Receiver
Rio Rancho, NM
19
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.
BLOCK FREQUENCY CAP ANTENNA
RANGE COLOR WHIP LENGTH
470 470.100 - 495.600 Black w/ Label 5.47”
19 486.400 - 511.900 Black w/ Label 5.19”
20 512.000 - 537.500 Black w/ Label 4.95”
21 537.600 - 563.100 Brown 4.73”
22 563.200 - 588.700 Red 4.47”
23 588.800 - 614.300 Orange 4.23”
606 606.000 - 631.500 (Use Block 24) 4.00”
24 614.400 - 639.900 Yellow 4.00”
25 640.000 - 665.500 Green 3.80”
26 665.600 - 691.100 Blue 3.61”
27 691.200 - 716.700 Violet (Pink) 3.46”
28 716.800 - 742.300 Grey 3.31”
29 742.400 - 767.900 White 3.18”
30 768.000 - 793.500 Black w/ Label 3.08”
31 793.600 - 819.100 Black w/ Label 2.99”
32 819.200 - 844.700 Black w/ Label 2.92”
33 844.800 - 861.900 Black w/ Label 2.87”
Note: Not all
Lectrosonics
products are
built on all of the
blocks covered
in this chart.
33
32
31
21
22
23
24
25
26
27
28
29
30
Frequency Blocks
Colored cap
20
Note: This line should be 6.00" long.
Whip Length
944
779
470
19
Cut top of colored cap
to make a colored sleeve
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