Acom 1500

ACOM 1500

Easy to operate
The TRI is a powerful tuning aid that, together with the automatically controlled input attenuator, helps the operator to quickly and precisely match the antenna impedance to the optimum tube load impedance (5-10 seconds typically). The auto-operate function (when enabled) maintains the amplifier in the OPERATE mode for you, thus avoiding unnecessary manual operations.

No antenna tuners
No heavy outboard antenna tuners required for antenna VSWRs up to about 3:1.  Your amplifier will enable you to change antennas virtually instantaneously and allow you to use your antennas over wider frequency ranges.

User-friendly
An  amplifier  that  is  both  user-friendly  and  that  looks after itself.  It is designed to safely withstand up to 300W reflected power, up to 100 milliseconds duration of drive spikes, drive RF “tails” after a PTT or KEY release, operator’s inadvertent tuning errors etc.     The amplifier also will not cease to function with a “soft” AC mains and will deliver more than half power at only 85% of nominal mains voltage. It can withstand voltage drops (down to zero Volts) for up to 10 milliseconds and can tolerate 15% mains voltage spikes, which is especially important on Field Day, during DXpeditions, and at portable operating events where emergency power is relied upon.

VFD comment display
All amplifier status indications are explained via detailed text displayed on the dot matrix, high brightness vacuum fluorescent display (VFD).  The upper line on the VFD always reads peak forward power.  LED indicators are provided for:  OPERATE mode, attenuation-on, transmit, selected antenna output , and ON/OFF conditions.

Three antenna outputs
Three antenna outputs are selectable using a push-button on the front panel.

Easy maintenance
Data  regarding  amplifier  internal  status  is  stored  in  a nonvolatile memory for 7 of the most recent auto protection trips. This information can be forwarded to your dealer for diagnostics.

Virtually silent QSK
The  input  bypassing  and  vacuum  antenna  relays  are virtually  silent  even  in  the  CW  QSK  mode  thanks  to specially designed mounting hardware.

Broadband input matching
Resulting in very good load to the transceiver over the entire spectrum 1.8-54MHz.

Single 4CX1000A tube
Uses a ceramic and metal radial beam tetrode with plate dissipation of 1000 W which is specially designed for class AB1 RF linear amplifier operation.

Tube protection
Permanent monitoring and protection of plate and grid voltages  and  currents,  as  well  as  of  the  exhaust  air temperature.

SPECIFICATIONS

Frequency Coverage

All amateur bands 1.8-54 MHz;

Power Output : 1500 W PEP or 1200 W continuous carrier, no mode limit;

Intermodulation Distortion: Better than 35 dB below PEP rated output;

Hum and noise : Better than 40 dB below rated output;

Harmonic Output Suppression : 1.8-21.5 MHz - better than 50 dB below rated output;

24-54 MHz - better than 66 dB below rated output;

Input and Output Impedances: Nominal value: 50 Ohm unbalanced, UHF (SO-239A) type connectors;

Input circuit: broadband, SWR less than 1.3:1, 1.8-54 MHz continuously (no tunings, no switching);
Bypass path SWR less than 1.1:1, 1.8-54 MHz continuously;
Output (antenna) impedance matching capability: SWR up to 3:1 or higher;
RF Gain

13 dB typically, frequency response less than 1 dB (60-85 W drive power for rated output);