Antenna/Block Reference Chart; Antenna Cutting Template - Lectronics Octopack Instruction Manual

Antenna/Block Reference Chart

The A8U whip UHF whip antenna 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 A8UKIT is is also available to construct an anten-
na as needed. The chart is used to cut the length cor-
rectly and for identifying the frequency of an antenna
that is not marked.
BLOCK
470
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
779
Cut top of colored cap
to make a colored sleeve
Rio Rancho, NM
FREQUENCY RANGE
470.100 - 495.600
486.400 - 511.900
512.000 - 537.500
537.600 - 563.100
563.200 - 588.700
588.800 - 614.300
614.400 - 639.900
640.000 - 665.500
665.600 - 691.100
691.200 - 716.700
716.800 - 742.300
742.400 - 767.900
768.000 - 793.500
793.600 - 819.100
819.200 - 844.700
844.800 - 861.900
779.125 - 809.750
Whip Length
Note: This line should be 6.00" long.
The lengths shown are specifically for the A8U whip
antenna with a BNC connector, as determined by mea-
surements 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.
CAP COLOR ANTENNA WHIP LENGTH
Black w/ Label 5.48"
Black w/ Label 5.20"
Black w/ Label 4.95"
Brown 4.74"
Red 4.48"
Orange 4.24"
Yellow 4.01"
Green 3.81"
Blue 3.62"
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"
Black w/ Label 3.00"
Frequency Blocks
Receiver Multicoupler
Colored cap
11