Ameritron ALS-600 Solid State no tune FET Amplifier & ALS-600PS 50 V Linear Power Unit.

In excellent condition and now fully tested.

Ameritron ALS-600 Amplifiers are 600 watt, solid-state linear amplifiers that use state-of-the-art, high voltage, RF TMOS-FET devices in the power output section. ALS-600 amplifiers provide continuous frequency coverage from 1.5 through 22 MHz (160 through 15 meters 10 and 12 meter operation included) with no tuning adjustments. Broadband 5-pole low pass filters provide output harmonic suppression in excess of all FCC requirements.

Uses four MRF-150 FETs operating at 50 V in a double ended push-pull parallel output configuration. High quality RF components combine with an accurate peak-detecting directional coupler, front panel adjustable ALC circuit with automatic SWR fold-back, and one-switch frequency selection to make these amplifiers some of the easiest to operate.

Matching power supply, ALS-600PS, is a linear transformer that weighs over 15 kg.

* Instant band switching, no tuning, no warm-up
* Automatic remote band switching is possible with the optional Ameritron Amplifier Radio Interface
* Output power is 600 watts PEP, 500 watts CW
* Continuous coverage 1.5 to 22 MHz; 10/12 meters included
* SWR protection prevents amplifier damage if you switch to wrong band, use wrong antenna, or have high SWR
* If output forward power or reflected power exceeds safe level, output power is automatically reduced to prevent amplifier damage by controlling ALC to exciter with Over Power Protection
* Extremely quiet, low speed, low volume fan--unlike noisy blowers used in other amps
* Very compact amplifier takes up less desktop space than your transceiver.
* Illuminated cross-needle SWR/wattmeter lets you read SWR, forward and reflected peak power simultaneously
* Operate/standby switch lets you run "barefoot," but you can instantly switch to full power if you need it
* Front panel ALC control, an exclusive Ameritron feature, lets you adjust your output power
* Transmit, ALC and SWR LED indicators
* 12 Vdc output jack lets you power low current accessories
* Separate ALS-600PS power supply (included) can be placed conveniently out of the way and plugged into your nearest outlet--no special wiring needed