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O O O O
INTERIM MANUAL
A A A A
LPHA
LPHA
LPHA
LPHA
PERATING
PERATING
PERATING
PERATING
PRELIMINARY DRAFT
PRELIMINARY DRAFT
PRELIMINARY DRAFT
PRELIMINARY DRAFT
A
LPHA/
by CrossLink, Inc. RF
Power for Communications and Industry
6185 Arapahoe Road,
Boulder, Colorado 80303-1401
(303) 473-9232 * FAX (303) 473-9660
6 6 6 6
M M M M
ANUAL
ANUAL
ANUAL
ANUAL
P
OWER
Page i i i i
Alpha 6 User Manual Rev X
Alpha 6 User Manual Rev X
Alpha 6 User Manual Rev X
Alpha 6 User Manual Rev X
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Related Manuals for Alpha Power ALPHA 6
Summary of Contents for Alpha Power ALPHA 6
- Page 1 Boulder, Colorado 80303-1401 (303) 473-9232 * FAX (303) 473-9660 INTERIM MANUAL Page i i i i Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X...
- Page 2 A L P H A P O W E R P R O D U C T S LPHA 6 perating anual DISCLAIMER Information in this document is subject to change CrossLink Inc. without notice. Information provided by CrossLink 6185 Arapahoe Road •...
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Page 3: Table Of Contents
& C ....................13 OAXIAL ABLE YPES ONNECTORS T/R C ..........................13 ONTROL ABLE 5: ALPHA 6 R ......................14 IGURE ANEL 4.1 Control Functions .........................15 4.2 Tune-up ............................15 Grid Current ............................16 ALC ..............................16 Tune-up Procedure ..........................16 Reflected Power Protection ....................17 Automatic Level Control (ALC) ..................... 18 6 –... - Page 4 Such damage is not covered under warranty. General Description of the ALPHA 6 Amplifier The ALPHA 6 is a self-contained 6m VHF Linear power amplifier capable of continuous operation at 1500 watts peak power output on SSB, keyed CW, SSTV, RTTY, digital modes or FM, with no time limit.
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Page 5: Owner Assistance
303.473.9660, or by email at alpha-service@crosslinkinc.com. Equipment Shipped The Alpha 6 ships in two heavy-duty cardboard cartons. One carton holds the power transformer and weighs 43 pounds; the second carton contains the amplifier and weighs 42 pounds. -
Page 6: Safety: Installation And Operation
CAUTION YOUR 6. The ALPHA 6 is extremely easy to install and operate, but failure to carry out each procedure exactly as described in the manual is likely to lead to amplifier damage which is not covered under warranty. Damage to other station equipment may also result. -
Page 7: Before Installing Your Alpha 6
4. Connect the green conductor in the Alpha 6 power cord only to the power source neutral or ground. Connecting the green wire to a “hot” line is almost certain to cause immediate damage. -
Page 8: Ac Power Source
Ask the contractor to measure the voltage and record it, so you can set the line voltage tap on the Alpha 6 appropriately. If he can, ask him to tell you the line voltage with a 10 Amp current draw, and use this value for setting the transformer tap. -
Page 9: Coax And Connectors
“tracking”, replace them. Doubling-up on insulators is also easy to do, and may save problems. If there is any chance of people or objects coming close to the antenna, take steps to move it higher, or place barriers so that this cannot happen. Check the SWR of your antenna. -
Page 10: Transformer Installation (See Figures 2-4)
Page 9 9 9 9 Page Page Page Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Interim Manual... -
Page 11: Ac Primary Connections & Amplifier Grounding
ALWAYS use grounding type AC connectors which conform to local codes and ensure that the green wire in the Alpha 6 power cable is wired only to the AC mains safety ground (or to neutral, as may be necessary with a 240V circuit configured 120V-N-120V without a separate ground, commonly found in the US). -
Page 12: Rf Grounding
The green conductor in the power cord is wired to the ALPHA 6 chassis. It MUST be connected only to the power source safety ground or neutral. The black and white power cord wires connect to the two “hot” wires of the AC source; either wire may be connected to either side of the line. - Page 13 NOTE: For heavy-duty use or 50 Hz operation, the optional auxiliary fan must be installed. Figures 2 – 4 ALPHA 6 Transformer Installation to be added here. Page 12 Page...
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Page 14: Coaxial Cable Types & Connectors
Alpha 6 to follow the CW keying. If a T/R timing problem is suspected, connect the CW keyer to the RELAY jack on the Alpha 6, and connect a cable from KEY OUT on the amplifier to the keying input of the transmitter. - Page 15 Figure 5: ALPHA 6 Rear Panel To be labeled Page 14 Page Page Page Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Interim Manual...
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Page 16: Control Functions
Press OFF to remove primary AC power. OPR/STBY - Operate places the amplifier in-line. With the Alpha 6 off, in StandBy, or in warm-up with the WAIT LED lighted, the amplifier is bypassed and the exciter is connected directly to the antenna. -
Page 17: Grid Current
The Alpha 6 grid current limiting circuits provide substantial tube protection against possible damage. The ALC voltage generated by the Alpha 6 cannot control the amplifier itself and is not applied internally. If ALC control is required, a connection must be made from the Alpha 6 to the transceiver ALC input. -
Page 18: Reflected Power Protection
11. Repeat steps 6 and 7 at least twice. 12. Touch up TUNE for maximum power output. The ALPHA 6 is now correctly tuned to deliver 1500 watts RF output on SSB, CW, FSK, SSTV and FM. The TUNE LED normally fluctuates during modulation or keying. -
Page 19: Automatic Level Control (Alc)
Icom transceivers generally require lower peak voltage, typically -2 to -3 VDC. Page 18 Page Page Page Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Interim Manual... -
Page 20: Top View
Figure 6 – Inside Top View INTERIM MANUAL Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X... -
Page 21: Owered
Figure 7 – Front Panel Lowered Page 20 Page Page Page Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Interim Manual Interim Manual Interim Manual... -
Page 22: Panel
Figure 8 - Inside Front Panel Page 21 Page Page Page Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Interim Manual Interim Manual Interim Manual... -
Page 23: Operating And Maintenance Notes
OPERATING AND MAINTENANCE NOTES TUBES The 4CX1600B tube used in the ALPHA 6 is very rugged and normally operates with a large margin of safety. It should provide outstanding service for many years if not damaged by abuse - especially overdrive or blockage of cooling airflow. Allow at least twelve inches (31 cm) unobstructed clearance around the air intake and exhaust areas. -
Page 24: Fuses
6 on again. IDLING PLATE CURRENT AND ELECTRONIC BIAS CONTROL (EBS) Idling plate current of the ALPHA 6 is approximately 350 to 400 mA during transmission. A detector senses RF drive, and reduces plate current to 30-50 mA during pauses in speech and key-up intervals, thus substantially reducing average power supply loading, heat generation, and wasted energy. - Page 25 There are no user-accessible lubrication points in the amplifier. Do not apply oil or grease to any of the components. The exterior of the ALPHA 6 may be cleaned with a mild household liquid detergent such as Formula 409 or Fantastik. Do not use chemical solvents, as these may severely damage the front panel or cabinet finish.
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Page 26: P Anel C Onnections
Figure 9 - Rear Panel Connections Page 25 Page Page Page Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Interim Manual Interim Manual Interim Manual... -
Page 27: Troubleshooting Hints
Amplifier operates but green GRID LED will not light and plate current is low; transceiver does not seem to be able to drive amplifier to its rated RF INTERIM MANUAL Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X... - Page 28 In rare cases it may be necessary to use a ceramic or condenser type microphone. Page 27 Page Page Page Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Alpha 6 User Manual Rev X Interim Manual Interim Manual...
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Page 29: Design And Circuit Overview
GT1, connected from the screen grids to ground, as well as D1 and R3 on the screen/filament board. The Alpha 6 RF output network is a conventional pi-L except that plate RF choke L4 is switched by a relay to optimize performance across all nine 1.8-29.7 MHz amateur bands. Two-section TUNE and LOAD capacitors C22 and C32 are switched to provide an “electrical vernier”... -
Page 30: Safety
- See Figure 10. SAFETY There are lethal voltages in the Alpha 6 amplifier. Special precautions must be taken to allow for the safe completion of these modifications. 1) Always unplug the amplifier from the 240 vac mains before opening the case and doing any work on your 6. -
Page 31: Alpha Products Warranty
303.473.9232 x. 151 Sales & Serivce 303.473.9660 fax www.crosslinkinc.com 6185 Arapahoe Road, Boulder CO 80303 INTERIM MANUAL Page 30 Alpha 6 User Manual Rev Alpha 6 User Manual Rev X X X X Alpha 6 User Manual Rev Alpha 6 User Manual Rev... - Page 32 INTERIM MANUAL Page 31 Alpha 6 User Manual Rev Alpha 6 User Manual Rev X X X X Alpha 6 User Manual Rev Alpha 6 User Manual Rev...
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