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Alpha 9500 Linear Amplifier User Manual
RF Concepts, LLC
Setting Up the Amplifier
Product Release 1
DOCNUMBER 9500
Document Issue 1.1
Page 4–8
February 2010
44
4
CAUTION
!
CAUTION! We strongly recommend that you operate the amplifier
on 240 VAC. If you choose not to heed this recommendation, see a
discussion of the limitations of doing so in
on 240 VAC. If you choose not to heed this recommendation, see a
discussion of the limitations of doing so in
1a
Connect the green wire in the amplifier power cable only to the AC
mains safety ground (or to neutral, as may be necessary with a 240-V
circuit configured 120V-N-120V without a separate ground,
commonly found in the US).
mains safety ground (or to neutral, as may be necessary with a 240-V
circuit configured 120V-N-120V without a separate ground,
commonly found in the US).
1b
Connect the black-and-white power cord wires to the two hot wires
of the AC source. Either wire may be connected to either side of the
line. For best results, use a dedicated 200–240 V branch circuit of #10
AWG copper wire or equivalent, rated at 20 A, to feed the amplifier.
of the AC source. Either wire may be connected to either side of the
line. For best results, use a dedicated 200–240 V branch circuit of #10
AWG copper wire or equivalent, rated at 20 A, to feed the amplifier.
1c
Connect the ground stud with wing nut on the rear of the chassis to a
good RF earth ground, such as a copper water pipe or driven rod, via
heavy copper braid or strap.
good RF earth ground, such as a copper water pipe or driven rod, via
heavy copper braid or strap.
Step 2
Adjust the 8877 tube and exhaust chimney.
2a
Ensure that the 8877 tube is firmly seated in its socket.
2b
Ensure that the silicon-rubber exhaust chimney is straight and that it
is fully and correctly installed so that the bottom of the chimney is
firmly against the tube deck and completely covers the airflow
opening in the deck. Tube cooling exhaust must exit only through the
tube anode fins; it must not be allowed to escape outside them.
Failure to ensure proper cooling airflow may result in tube damage or
destruction, which is not covered under warranty.
is fully and correctly installed so that the bottom of the chimney is
firmly against the tube deck and completely covers the airflow
opening in the deck. Tube cooling exhaust must exit only through the
tube anode fins; it must not be allowed to escape outside them.
Failure to ensure proper cooling airflow may result in tube damage or
destruction, which is not covered under warranty.
2c
Ensure that the anode connector is tightly clamped to the 8877 tube.
Step 3
Replace the amplifier cover and all attachment screws.
Use only the 6-32 screws supplied with the amplifier and do not tighten
any of the screws until all are started.
any of the screws until all are started.
WARNING
!
WARNING! Do not attempt to operate the amplifier with the cover
removed or placed on the unit without the attachment screws. Doing
so damages the Alpha 9500 and may also cause injury or death to the
operator.
removed or placed on the unit without the attachment screws. Doing
so damages the Alpha 9500 and may also cause injury or death to the
operator.