Specifications, ALPHA 99
Frequency Coverage:
All amateur bands 1.8-29.7 MHz* plus
most non-amateur frequencies 6.0-19.0
MHz and 20.0-30.0 MHz.
Power Output:
1500 watts peak all modes, including
SSB, CW and continuous or modulated
carrier. Carrier operation (e.g., A0,
RTTY or FM) for more than 5 minutes
at or near maximum rated power
requires use of the auxiliary cooling fan
accessory.)
Drive Power:
50 to 60 watts nominal for rated output.
Power Gain:
Nominally 14 dB, a power increase of 25
times.
Input Impedance:
50 ohms nominal, unbalanced; VSWR
<1.5:1.
Output Impedance:
50 ohms unbalanced.
Maximum Load VSWR:
2:1 at full rated power output.
VSWR Trip:
Automatic standby when reflected
power >250 watts.
Intermodulation Distortion:
30 dB below rated output.
Harmonic Output:
<-60 dBc.
Tubes:
Two Svetlana 4CX800 ceramic-metal
tetrodes.
Cooling:
Full-cabinet, ducted forced air using
cushion-mounted centrifugal blower.
Automatic Level Control (ALC):
Negative from 0, adjustable.
Primary Power:
190-250 or 90-130 VAC nominal, 50-60
Hz, fused at 20 amperes.
Power Transformer:
3+ kVA with strip-wound Hipersil core.
Radio Alpha Products Inc. ® Alpha 99
9
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