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RF class AB power amplifier

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THE new Ophir model 5074 RF class AB power amplifier from Westek Electronics has a bandwidth from 30 to 512MHz, covering the military VHF/UHF bands, and is suited to applications including EW and satellite communications.

Minimum linear output is 25 watts (AM) and saturated power output is 40 watts (FM). Input signals can be CW, AM, FM, PM, and pulse.

The Ophir 5074 is available in various options: rack-mounting (100-240V ac) with rear panel connectors, front panel connectors, or the former two with control panel or with Ethernet interface.

Alternatively, the amplifier is available in module form (model 5303074) suitable for cold-plate mounting and requiring only a single 28 volt dc power supply.

The Ophir 5074/5303074 amplifiers have small signal gains of +48dB, response flatness of ñ1.5dB, harmonics of less than -20dBc and spurious signals of less than -60dBc.

The Ophir amplifiers are suitable for operation in ambient temperatures from 0°C to +50°C, up to 95% RH, and to altitudes of 3000 metres.

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