Cat. No.
Telescoping Antenna for Portable Scanners and Walkie Talkies
You can use this telescoping antenna for either receiving or transmitting. You can use it as a receiving antenna from 25 MHz through the 1296 MHz Ham Band, and you can use it as a 1/4 wavelength transmitting antenna from 130 MHz through 535 MHz.
USING THE ANTENNA FOR TRANSMITTING
For transmitting, you must set the antenna length as close as possible to the trans- mitting frequency’s 1/4 wavelength. This ensures the best possible transmission by using the proper standing wave ratio (SWR).
Cautions:
•When you use the antenna to transmit, you must always collapse the section located just above the loading coil. If you do not, you might damage the antenna and/or your radio.
•When you use the antenna to transmit, you must calculate the 1/4 wavelength and adjust the antenna length accordingly. If you do not do this, you can dam- age your transmitting equipment due to an improper standing wave ratio (SWR).
Use this formula to calculate the proper length for a 1/4 wavelength transmitting an- tenna:
2834
Freq. in MHz = Antenna Length in Inches
Example: 2834
147 (MHz) =19.3 Inches
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