Specifications; Parameters; Functions - Acom 1500 Manual

7. SPECIFICATIONS

7-1. Parameters

a) Frequency Coverage: All amateur bands 1.8-54MHz, extensions and/or changes on request.
b) Power Output: 1500W PEP or 1200W continuous carrier, no mode limit.
In continuous carrier modes (RTTY etc.) for transmissions longer than 15 minutes (up to several hours
depending on ambient temperature), the external auxiliary fan must be installed.
c) Intermodulation Distortion: Better than 35dB below PEP rated output.
d) Hum and noise: Better than 40dB below rated output.
e) Harmonic Output Suppression:
1.8-29.7MHz - better than 50dB below rated output, 50-54MHz - better than 66dB below rated output.
f) Input and Output Impedances:
- Nominal value: 50 Ohm unbalanced, UHF (SO239A) type connectors;
- Input circuit: broadband, VSWR less than 1.3:1, 1.8-54MHz continuously (no tunings, no switching);
- Bypass path VSWR less than 1.1:1, 1.8-54MHz continuously;
- Output (antenna) impedance range capability: VSWR up to 3:1 or higher.
g) RF Gain: 13dB typically, frequency response less than 1dB (60-85W drive power for rated output).
h) Primary Power: 100-264V (100, 110,120, 200, 210, 220, 230 & 240V nominal taps, +I0% -15% tol.),
50-60Hz, single phase, 3500VA consumption at rated output.
i) Complies with CE safety and electromagnetic compatibility requirements as well as
FCC-regulations.
j) Size & Weight (operating): W422mm x D355mm x H195mm, 26.5kg.
(16.6 x 14 x 7.7 inches, 58.4Lbs)
m) Operating environments:
- Temperature range: 0...+50 degs. Celsius;
- Humidity: up to 95% @ +35 degs. Celsius.
- Height: up to 3000m (10 000ft) above sea level without output deterioration.

7-2. Functions

a) Antenna Impedance Matching Process: plate-load True Resistance Indicator (TRI) aided.
b) Three antenna outputs selectable by a button on the front panel.
c) T/R System: QSK operation with quiet, built-in vacuum RF antenna relay.
d) Protections:
- Cover interlock for operator's safety;
- Inrush power-on current is limited;
- High voltage, control grid, screen grid, and plate currents;
- Exhaust air temperature;
- T/R sequencing;
- Antenna relay contacts, including RF power induced in antenna from another nearby transmitter;
- Antenna matching quality;
- Reflected power;
- RF arcs, including in antenna system;
- Overdrive.
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