Lectrosonics UM250b - Manual (Page 13)

UHF Belt-Pack Transmitter
A6U UHF ANTENNA
33
32
31
21 22 23 24 25 26 27 28 29 30
after cutting to length.
Frequency Blocks
Colored sleeve
Black cap
This is a full size cutting template. Lay the actual antenna on top of this drawing and cut at the mark
for the desired frequency group.
Install cap on end of antenna
Kits are shipped from the factory with caps of the various colors plus a black cap. After
cutting the antenna to the desired block length, select the properly colored cap and cut off
the closed end to make the colored sleeve. Slide the colored sleeve onto the antenna as
shown above then slide the black cap onto the cut end of the antenna.
FREQUENCY ANT SLEEVE ANTENNA
BLOCK RANGE COLOR WHIP LENGTH
21 537.600 - 563.100 Brown 4.74"
22 563.200 - 588.700 Red 4.48"
23 588.800 - 614.300 Orange 4.24”
24 614.400 - 639.900 Yellow 4.01"
25 640.000 - 665.500 Green 3.81"
26 665.600 - 691.100 Blue 3.62"
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 Orange/Black 3.08"
31 793.600 - 819.100 Orange/Brown 2.99”
32 819.200 - 844.700 Orange/Red 2.92”
33 844.800 - 865.000 Orange/Orange 2.87”
The sleeve color follows the standard resistor color code for the second numeral in the
group number.
*IMPORTANT
Whip Length
Measure the length of the whip that protrudes outside of the SMA connector.
Rio Rancho, NM – USA 13