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Summary of Contents for Alpha Power ALPHA 89
- Page 1 OPERATING MANUAL ALPHA 89 HF LINEAR POWER AMPLIFIER ALPHA/POWER, INC. RF Power for Communications and Industry 14440 Mead Court – Unit B, Longmont, Colorado 80504 (970) 535-4173 FAX (970) 535-0281...
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Page 2: Table Of Contents
TABLE OF CONTENTS INSTALLING YOUR ALPHA 89 ..........1 OPERATING YOUR ALPHA 89 ..........2 1.0 - INTRODUCTION ........................3 2.0 - OVERVIEW OF AMPLIFIER CAPABILITIES ..............3 SPECIFICATIONS ....................4 -ALPHA 89 4.0 - UNPACKING AND PREPARATION ..................5 Figures 1-3 Transformer installation ....................6 Figure 4 Inside top view ........................ -
Page 3: Installing Your Alpha 89
INSTALLING YOUR ALPHA 89 The ALPHA 89 is easy to install, but failure to carry out each procedure exactly as described in this manual is likely to lead to amplifier damage which is not covered under warranty. Damage to other station equipment also may result. -
Page 4: Operating Your Alpha 89
READ BEFORE PROCEEDING! TO AVOID SERIOUS DAMAGE NOT COVERED UNDER WARRANTY READ THIS MANUAL CAREFULLY BEFORE OPERATING YOUR ALPHA 89 is easy to operate, but failure to carry out each procedure exactly as described in this manual is likely to ALPHA 89 lead to amplifier damage which is not covered under warranty. -
Page 5: Introduction
This Manual provides all the information necessary to install and operate your . Sche- ALPHA 89 matic diagrams are availa ble on request, at no charge to owners. For your own protection please return the Owner Registration Card immediately and advise ETO of any future address change promptly. -
Page 6: Alpha 89 Specifications
SPECIFICATIONS 3.0 - ALPHA 89 Frequency Coverage: All amateur bands 1.8-29.7 MHz* plus most non-amateur frequencies 6.0-19.0 MHz and 20-30 MHz. * NOTE: FCC rules do not permit new amateur amplifiers to be operable on 24-30 MHz as delivered within the U.S. -
Page 7: Unpacking And Preparation
Inspect carefully for shipping damage. If damage is discovered in either of these two steps notify ETO Customer Service immediately. 4.3 Connect the proper internal line voltage tap. The ALPHA 89 may be operated from any AC power source of 190-250V, 50-60 Hz, 20 ampere capacity. A 4-terminal barrier strip for tap selection is located toward the back chassis wall to the left of the transformer. -
Page 11: Control & Indicator Functions
CW and FM). 5.7 OPR/STBY rocker switch: Selects operate or standby modes. 5.8 ON and OFF rocker switches: momentary action switches turn the ALPHA 89's main AC power on or off. 5.9 Special rear-panel connections: a) ALC & ALC Adjust - See section 8. 3. -
Page 13: Installation
6.5 Connect a heavy copper strap or braid from the ground stud & wing nut on the rear panel of the ALPHA 89 to the chassis of the transceiver and other station equipment, and to the main station RF ground. -
Page 14: Operation
7.0 OPERATION If the ALPHA 89 already is tuned and loaded for the operating frequency, it is necessary only to turn on the amplifier, wait 3 minutes for tube warm-up time delay to complete, then switch to OPERATE and apply drive. Before operating on a frequency or band different from that previously used, the 89 must be re-tuned by the operator. - Page 15 If output is less than desired, increase LOAD setting slightly and repeat this section. 7.6 Alternate tuneup procedure not using TUNE indicator a) Preset ALPHA 89 controls per "tune up settings", page 14. b) Slowly increase transceiver output to 25-30 watts. Adjust amplifier LOAD control to maximize RF output.
- Page 16 e) If RF OUTPUT after step c) is greater than desired... 1) Reduce transceiver drive until Ig drops below 35 mA. 2) Reduce LOAD setting until Ig rises to about 45 mA. 3) Adjust TUNE for maximum Ig. 4) Repeat sections c) and e) as necessary, until desired RF output is achieved with 35-50 mA 1g. CAUTI0N! If, during operation at or below desired power on any band, the grid current exceeds 70 mA, turn LOAD to a higher setting (to increase loading) and then adjust TUNE for maximum RF OUTPUT Repeat if necessary until peak grid current at desired output does not exceed 50-60 mA.
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Page 17: Faults And Protective Functions
Switch the ALPHA 89 to STBY (standby) c) Correct the condition that caused the fault d) Return the ALPHA 89 to OPR (operate), and... e) Resume transmission 8.2 Hard Faults: Failures such as HV shorts (extremely high plate current) or bias or control system failure result in immediate shutdown of amplifier AC power to avoid damage. -
Page 18: Troubleshooting Suggestions
This signal will then be "linearly" amplified by the ALPHA 89 so that it is not only loud but obnoxious as well, earning the unlucky operator the distinction of being a one-man pileup on the frequency! -
Page 19: Alpha
89 FUNCTIONAL CONFIGURATION 10.0 - ALPHA Figure 8 on the following page is a simplified block diagram of the ALPHA 89. 1) Principal functional components are emphasized as follows: a) Heavy rectangular boxes represent individual modules of the amplifier, in most (but not all) cases circuit boards (PCBs). -
Page 22: Alpha Products Warranty
ALPHA PRODUCTS WARRANTY ALPHA/POWER, INC. (API) WARRANTS AS FOLLOWS EACH NEW AMATEUR RADIO PRODUCT OF ITS MANUFACTURE, SOLD AND USED IN THE UNITED STATES, ITS POSSESSIONS, AND CANADA: Workmanship and all components except rf power tubes are warranted for FOUR YEARS from date of original purchase if used exclusively in licensed amateur radio service.
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