RA-4A VHF Antenna

RA-4A VHF Antenna
RA-4A VHF Antenna shown in vertical polarization
Standard Frequency Bands* Number of
Antenna Gain Connections on Antenna Handheld Fixed Site Land
Boats &
Yagi 148-152 MHz
150-154 MHz
158-162 MHz
164-168 MHz
168-172 MHz
170-174 MHz
5 9 dBd Supports "pigtail" connection
Cable not included

The RA-4A antenna is the standard 5 element antenna only suited for a mast mounting and fixed site applications. It is not practical to use this large an antenna in a handheld application. A single antenna can be "end mounted" with either horizontal or vertical polarization to optimize signal reception. In a single antenna configuration, the signal bearing is based upon obtaining a peak signal. This antenna is also used in the RA-NS array for precision direction finding (accuracy of 1-3 degrees) where the null is used to determine signal bearing. The antenna is DC grounded and can be used with the TLA-1 Lightning Arrester in areas where lightning storms occur frequently.


Frequency Ranges148-152 MHz, 150-154 MHz, 158-162 MHz, 164-168 MHz, 168-172 MHz, 170-174 MHz
Gain9 dBd
Front to back ratio20 dB
ConnectorSupports "pigtail" connection
Number of elements5

Service Commitment

Since 1970, Telonics has built a reputation based on product quality, product support, service, and customer satisfaction. Telonics strives to produce the highest quality products, and to support those products accordingly.

Because of extreme conditions and the unpredictable nature associated with most telemetry applications, problems occasionally arise. Most problems can be resolved quickly. In all cases, we hope to be able to work in partnership with users to resolve problems to the user's satisfaction and to uphold our demonstrated commitment to excellence. If problems should arise, all products must be returned to our factory for failure analysis.

Warranty: VHF Receiving Antennas

1.1 VHF receiving antennas are warranted to be free from defects in materials and workmanship and to perform to the operational specifications as published by Telonics for a period of 90 days from the date of initial shipment of the antenna by Telonics.


It is the purchaser's obligation to make certain that it orders the correct size and type of antenna for the particular application, and no warranty is expressed or implied for any failure to meet operational specifications due in whole or in part to use of an incorrect size or type of antenna.

No warranty is expressed or implied with regard to abnormal events or damage due to human actions such as gunshot damage, vehicle encounters, etc. Further, no warranty is expressed or implied with regard to damage resulting from misuse, accidents, unauthorized service, extreme conditions, or other causes not specifically enumerated herein.

The entire risk, as to the results and performance of the antenna, is assumed by the customer. Neither Telonics, nor its suppliers, shall have any liability to the customer or any other person or entity for any indirect, incidental, special, or consequential damage whatsoever, regardless whether Telonics has been told of the possibility of such damages or that such damages might be foreseeable. Telonics has no responsibility or liability for the claims of any third party. Telonics' and its suppliers' maximum aggregate liability shall not exceed the amount paid by the customer for the antenna.

Exercising the Warranty

If a defect occurs, return the Subsystem to Telonics within the applicable time frame noted above at the following address: TELONICS, 932 E. IMPALA AVENUE, MESA AZ USA 85204-6699. Telonics does not assume responsibility for loss or damage to equipment during shipment. Telonics does not assume responsibility for delays resulting from shipment on commercial or private carriers. We insure all equipment shipped from our facility and suggest that shipments to Telonics also be insured. Customer shall arrange for and pay all shipping, insurance and related charges incurred in the shipment of Subsystems to and from Telonics under this warranty.

Upon the timely return to our facility within the applicable time frame noted above the antenna will be replaced or repaired, at Telonics' sole discretion, at no cost to the customer, other than shipping charges. This remedy is the exclusive remedy. This product is supplied without any further warranties or conditions, expressed or implied, including warranties of merchantability, quality or fitness for particular reason or those arising by laws, statutes or trade usage or course of dealing.

The above warranty extends only to the original purchaser and does not cover any antenna which is resold or otherwise transferred from the original purchaser to another party. The warranty will be extended to customers who purchase the antenna directly from a Telonics-authorized distributor.