1.4. Features
•Easy to operate. The TRI is a powerful tuning aid which, together with the automatically controlled
input attenuator, helps the operator to quickly and precisely match antennas (5-10 seconds typically).
The auto-operate function (when enabled) maintains the amplifier in OPERATE mode for you, thus
saving manual operations and time.
•No heavy outboard antenna tuners required for antenna VSWR up to 3:1 (and higher on some bands).
Your amplifier will perform the functions of an antenna tuner, thus enabling you to change antennas
faster and use them over a wider frequency range (saving tuning time).
•An amplifier that is both user-friendly, and that looks after itself. It is designed to safely withstand up
to 500W 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. It would also not cease to function with a "soft"
AC line and would deliver more than half power at only 75% of nominal mains voltage. It would
withstand up to 10 milliseconds (down to zero) voltage drops, and up to +15% line voltage spikes,
which is important particularly when used at field days, DXpeditions, and other portable events.
•OLED comment display. All amplifier status indications are explained via detailed text displayed on the
dot matrix display OLED. The upper-line’s strip on the OLED always reads peak forward power. LED
indicators are provided for OPERATE, attenuation-on, and ON/OFF conditions.
•Easy maintenance. Signatures of the amplifier internal status are stored in a nonvolatile memory for 7
most recent auto protection trips. This information can be forwarded to your dealer for diagnostics.
Using an EXCEL APPLICATION (available from ACOM or your dealer free of charge) and a PC you can
decode the signatures by yourself, too.
•Less noise in the shack: the input bypassing and the vacuum antenna relays are virtually silent even in
QSK CW mode due to their special mounting.
•Less QRM and improved Electro Magnetic Compatibility during tuning. Antenna matching can be
achieved in less than 10 seconds at a quarter of nominal output power.
•Operates without special signals from the transceiver - "ground on TX" and 60W RF drive power are
sufficient.
•Broadband input matching circuit resulting in very good load to the transceiver over the entire
spectrum from 1.8MHz up to 54MHz.
•Uses a single 4CX800A (GU74B) Svetlana high-performance ceramic-metal tetrode with plate
dissipation of 800W (forced air cooling, grid-driven).
•Permanent monitoring and protection of plate and grid voltages and currents, as well as of the exhaust
air temperature. The Bias Optimizer decreases the heat dissipated from the tube, and there is
automatic protection against overheating in accordance with the specifications of the tube producer.
•An output RF Arc protection is employed. It safeguards the amplifier, antenna, antenna selector, and
tuner against severe damage in case of possible break down.
•High voltage power supply inrush current protection, which eliminates the danger of affecting sensitive
devices, connected to the same mains circuit (important when used portable). The amplifier can be
configured for 8 nominal line voltages: 100, 110, 120, 200, 210, 220, 230, and 240VAC, 50 or 60Hz.
