Specifications

Radio Alpha Products Inc. ® Alpha 99

If the same circuit also supplies a transceiver drawing peak line current of 5A and a

lamp drawing 1A, only 20-5-1 = 14A is available for the amplifier and maximum

possible output is about:

Po max = (115V x 14A) /2.3 = 1610/2.3 = 700W.

RF Grounding

A ground stud with wing nut is provided on the rear of the chassis. Connection

should be made from this stud to a good RF earth ground, such as a copper water pipe

or driven rod, via heavy copper braid or strap. CAUTION: When using any high

power amplifier, failure to connect ALL station equipment to a good common ground

may allow RF feedback to leak into the transceiver and cause severe signal distortion.

Replacing the Amplifier Cover

Use only the 6-32 screws supplied with the amplifier and do not tighten any of the

screws until all are started. Do not attempt to operate the amplifier with the cover

removed. This WILL cause damage to the Alpha 99 and may also lead to injury or

death to the operator.

Internal Blower/Auxiliary Fan

Remove the blower motor shipping hardware (two 10-32 bolts, fiberwashers, rubber

shim) from rear chassis wall. Save this hardware! It must be reinstalled whenever the

chassis is transported. For heavy-duty use or 50 Hz operation, the optional auxiliary

fan is required.