1. GENERAL INFORMATIONCongratulations on purchasing one of the finest HF amplifiers in the world today. ACOM is pleasedthat you have chosen one of our products, and we will endeavor to provide you with the informationand support you need to enjoy your purchase for many years. We urge you to read all of the followingmaterials before you embark on operating your new amplifier.1-1. Introduction and DescriptionThis manual explains the installation, operation, and maintenance of the ACOM1010 HF linearamplifier.The ACOM1010 is a self-contained linear amplifier that covers all amateur bands, from 1.8 through29.7 MHz. It provides over 700-W PEP of output power (or 500 W in continuous-duty operation) withless than 60-W of drive. The amplifier is designed to tolerate VSWR levels of up to 3:1 throughout itsoperating range, and tuning is simplified by ACOM’s exclusive True Resistance Indicator (TRI). Also,a built-in antenna selector switch with two outputs is included to provide instant choice of antennas.Importantly, a variety of system parameters are continuously monitored and available to the operatorto assure safe and efficient amplifier operation.1-2. Owner AssistanceIf technical or operating assistance is needed, your local dealer should be contacted first. In the unlikelyevent you need further information, you may get in touch with ACOM by facsimile, telephone, email orstandard mail. Fax: + 359 2 920 9656; telephone: + 359 2 920 9655; e-mail: acom@mail.orbitel.bg;standard mail: ACOM, Bul. N.Mushanov 151, 1330 Sofia, Bulgaria.1-3. Equipment SuppliedThe ACOM1010 amplifier and this manual are shipped in a cardboard carton.1-4. Featuresl Easy operation. The plate-load True Resistance Indicator (TRI) is an ACOM innovation that providesquick and precise tuning, typically in less than 10 seconds. The auto-operate function will return theamplifier to the OPERATE mode automatically after each protection trip, saving time and avoiding manualswitching.l No tuner needed. No external antenna tuner is required as long as the antenna VSWR is 3:1 or lower.The amplifier will perform the functions of an antenna tuner, enabling you to change antennas faster anduse them over wide frequency ranges.l A durable amplifier. This amplifier is both user-friendly and self-monitoring. It is designed to safelywithstand up to 240 W of reflected power, up to 100 milliseconds of drive spikes (RF “tails” after a PTTor KEY release), and even operator tuning errors. It is also capable of operating at more than half itsdesigned output power at only 75% of nominal line (mains) voltage. Because it can tolerate deep voltagedrops (down to zero for 10 milliseconds) and 15% line voltage spikes, it is particularly suited for use inportable environments, such as field days and DXpeditions.l LED bar-graph display. The upper LED bar-graph always reads peak forward power while the lowerLED bar-graph is for the reflected power. LED warning indicators are provided for abnormal conditionsof grid 1, grid 2, and plate parameters.