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AS-1735-SRC: Quick Reference Data

Part Number -- AS-1735-SRC

Name: Around-the-Mast UHF Antenna
Category: VHF Antennas
Photo(s): AS-1735/SRC
NATO Stock Number (NSN): 5985-00-127-3306
Frequency Range: 225 MHz to 400 MHz - for antennas (repeated below)
Features: * broadband
* high power
* low VSWR
* light-weight
* shipboard applications
* receiving or transmitting mode
Description: The AS-1735/SRC, UHF Antenna is a rugged, vertically polarized, broadband antenna covering the frequency range of 225 MHz to 400 MHz.  This light weight antenna has an all aluminum outer structure which can be mounted around an existing mast ranging from 4 inches to 12 inches in diameter. As an option, the AS-1735/SRC can also be made to mount onto masts of up to 15 inches in diameter.

The antenna is designed for use under the severe environmental conditions encountered in a shipboard environment.

The four radiating elements are fed in-phase from a single input and provide omni-directional radiation in the azimuth plane.

The AS-1735/SRC antenna can be used in either the transmit mode or the receive mode without any adjustments.  It can handle a peak envelope power (PEP) of 2 KW and exhibits a nominal input impedance of 50 ohms and a VSWR of less than 1.8:1 over the entire frequency range of 225 MHz to 400 MHz.

The antenna has been designed to meet the vibration requirements of MIL-STD-167, TYPE I and II, the shock requirements of MIL-S-901 and the environmental requirements of MIL-E-16400H.
Technical Manual:    AS-1735 Manual

Electrical Characteristics

Frequency Range: 225 MHz to 400 MHz
Polarization: Vertical
Power Handling: 2 KW PEP (Peak Envelope Power) 1 KW average
Azimuth Coverage
[Radiation Pattern]
:
Omni-directional within ± 2 dB when mounted on 11 inch diameters or less
Impedance: 50 Ohms (nominal)
VSWR: less than 1.8:1 
Gain: ± 2  dBi over an isotropic source
Input Connection/or: UG-352/U (LC-Type)

Mechanical Characteristics

Weight: 31 Lbs. (14.1 kg)
Mounting Positions: vertical masts of 4 to 12 inch diameters
Dimensions: 29.75 in by 29.75 in by 28.25 in high (75.6 cm by 75.6 cm by 71.8 cm high)
Finish: Epoxy polyamide paint, colour haze grey

Environmental Characteristics

Temperature: 
- Operating
 - Storage


- 76°F to
140°F (-50°C to 65°C)
- 140°F to 158°F (-95°C to 70°C)

Wind Loading Test:  - Operating
              - Survival


- 75   MPH (120 KM/H)
- 120 MPH (192 KM/H)
Vibration: MIL-STD-167-1, Type 1
Shock: MIL-S-910-C, Grade A
 

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