• Conservative maximum legal power.
• all HF bands, all modes with no time limit.
• rugged metal-ceramic tubes at half the usual cost.
• MASSIVE tape-wound HIPERSIL® transformer
• 4-year Alpha/Power limited warranty.
• 30-day money-back guarantee.

THE ULTIMATE VALUE IN HF LINEAR AMPLIFIERS

The ALPHA 99 is a rugged, maximum legal power hf amplifier. It's derived from our basic ALPHA 89 design platform, using lower-cost Svetlana 4CX800A tubes.  We've made refinements and component upgrades to the 91b to create the new Alpha 99, but the model number may be the only change you'll actually notice.  Nearly a thousand 91b owners can confirm that it measures up in every way to what they expect from an ALPHA. The ALPHA 99 is now in production at our Boulder facility.

ALPHA/POWER provides a four-year, non-prorated factory limited warranty and a 30-day money-back guarantee on all new ALPHAs including the 99. We warrant Svetlana tubes for one year. You know you can count on us to support any ALPHA sold by us and by our authorized dealers ...we've been here for you for 31 years!

 RF POWER OUTPUT:
FREQUENCY COVERAGE:


BANDCHANGE/TUNEUP:
  DRIVE POWER:
 INPUT IMPEDANCE:
 HARMONICS:
 INTERMODULATION:
 T/R & CW KEYING:

TUBES & CIRCUIT:


METERING:



PROTECTION:





 COOLING:
   TRANSFORMER:
  AC POWER:


PHYSICAL:


OWNER PROTECTION:

1.5 kW PEP or carrier, any mode, no time limit
All amateur bands 1.8-29.7 MHz including WARC;
FCC-required 10 -12 meter lockout easily deactivated
by authorized users (15m -10m locked out)
 5 second manual bandchange & tuneup by the numbers
55-60 W nominal for full rated output
50 ohms nominal, VSWR < 1.5:1
At least 50 dB below peak output @ 1.5 kW
At least 36 dB below peak output @ 1.5 kW
Vacuum relay QSK fast enough for high speed
CW & digital modes
Two 4CX800A/GU-74b ceramic-metal tetrodes;
resistive grid, pi-L output; common cathode w/RF negative feedback; regulated screen supply
Dedicated LED bargraphs for RF Output and RF Reflected Power; switched bargraph for HV, Ip and TUNE functions; LEDs for Normal & Excessive Grid Current; status LEDs ON, WAIT, OPR and FAULT
Grid & screen current limiting; trip to standby (automatic reset) for excessive VSWR or average plate current, RF arc, severe mistuning; AC off trip for HV fault; primary & step-start fuses; cover AC interlock &  HV crowbar switches; AC inrush-current limiting (Step-start).
Full-cabinet forced air; rubber isolated blower
3.5 kVA Hipersil®
100/120/200/220/240V nominal, 50-60 Hz, 1 phase,
fused at 20A; operation on 100-120V may reduce available output below maximum rating.
17.3" W x 7.5" H x 16.5" D (439 x 188 x 419mm); 65 lb. (30 kg). Plug-in transformer. Shippable by UPS in two cartons,  each about 40 lbs. (18 kg).
30 day money-back guarantee & 4-year limited non-pro-rated warranty (copy available upon request).