Mt Washington Wx CAM
Alpha 76A Amplifier
Alpha 76A Specifications:
- Frequency Coverage: 1.8-2.0 and 3-22 MHz (including 15-160 meters).
- Plate Power Input: To 2.5 kW PEP/SSB, 1 kW average or carrier, CCS.
- Typical Efficiency: 60% (RF output/d-c input).
- Drive Power: Nominal.100-120 watts PEP, 60-80 watts carrier.
- Input & Output Impedances: Nominal 50 ohms, unbalanced; load VSWR 2:1 or less.
- Distortion: Third order IM more than 30 dB below 1 kW PEP rf output.
- Harmonics: 50 dB or more below mean fundamental frequency output.
- Tube Complement: Two Eimac 8874 ceramic triodes in grounded-grid.
- Cooling: Full-cabinet, ducted forced air with cushion-mounted centrifugal blower.
- ALC: Negative-going, adjustable threshold. (Amplifier ALC is not normally used with modern, broadband, solid state transceivers.)
- HV/LV Tap Change: Internal relay is standard.
- Protection: Primary Fuses, plate overcurrent relay, AC and HV interlocks
- Primary Power: 220-250V/10A or 110-130V/20A, 50-60 Hz, single phase.
- Size: 7.5" h x 17" w x 14.75" d (19 x 43 x 38 cm).
- Weight: 65 lb (30 kg) net; 75 lb (34 kg) shipping in two cartons.
- Quantity: There were 1649 Alpha 76A amplifiers manufactured.
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