ASTRO XTS 2500/XTS 2500I Model III 111
Helpful Tips
Antenna
Radio Operating Frequencies
The following antenna types are compatible with your radio:
Before installing the antenna, 
make sure it matches your 
radio’s operating frequency. 
Antennas are frequency 
sensitive and are color coded 
according to their frequency 
range. The color code indicator 
is located in the center of the 
antenna’s base.
Antenna Type
 Approx. 
Length
Insulator 
Color
Code
Frequency 
Range 
(MHz)
Antenna 
Kit No.
in. mm
VHF whip 8 203 RED 136 – 174 NAD6563
VHF helical 7.6 193 YELLOW 136 – 150.8 NAD6566
VHF helical 7 178 BLACK 150.8 – 162 NAD6567
VHF helical 6.5 165 BLUE 162 – 174 NAD6568
UHF helical 3.3 83 RED 380 – 435 NAE6546
UHF helical 3.1 78 GREEN 435 – 470 NAE6547
UHF helical 2.8 71 BLACK 470 – 520 NAE6548
UHF whip,  
wideband
5.2 133 GRAY 380 – 520 NAE6549
color
94C06.book  Page 111  Wednesday, June 23, 2010  11:41 AM