Armstrong X-500B Original price was: $14,876.Current price is: $14,169.
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italab archimede 5000 2
ITALAB ARCHIMEDE 5000 Original price was: $18,768.Current price is: $11,592.

Armstrong X-1000B

1kW AM Transmitter

The Armstrong X-1000B and X-500B transmitters are constructed with two 600 Watt RF modules capable of 150% modulation and can bring that major market sound to your radio station.

Original price was: $19,358.Current price is: $18,436.

SKU: 102004


The Armstrong X-1000B is a compact, solid-state AM transmitter that delivers 1000 watts of power and supports HD Radio.

Engineered to provide high-quality audio with low maintenance and optimized multiphase modulation, this transmitter meets broadcasting needs with efficiency and reliability.

Key Features:

  • Space-Efficient Design:
    • Housed in a robust aluminum chassis
    • Fits into a standard 19″ rack, occupying just seven rack spaces (12.25″)
    • Ensures durability and easy integration into broadcasting setups
  • Modular Configurations:
    • Includes hot-pluggable 600-watt modules
    • Offers flexibility with three preset power levels that can be set in the field
    • Adaptable for full power as well as pre-sunrise/post-sunset power adjustments
  • Remote Control Capability:
    • Complete remote control via a rear-mounted DB 25 connector
    • Enables easy operation and management
  • HD Radio Compatibility:
    • Compatible with HD Radio technology
    • Features an external RF input for digital signal injection, allowing seamless integration with digital broadcast systems

Main Features:

  • High RF PA Efficiency:
    • Over 90% RF power amplifier efficiency
    • Ensures effective power utilization and minimizes energy wastage
  • Multiphase Modulation:
    • Optimized multiphase modulator with flat group delay and low source impedance
    • Enhances modulation quality
  • Modulation Capabilities:
    • Capable of up to +150% positive modulation
    • Provides additional modulation headroom for optimal signal quality
  • Redundant and Reliable:
    • Two hot-pluggable 600-watt RF modules for reliability and headroom
    • Two high-efficiency switching power supplies ensure consistent operation
  • Compact and Future-Ready:
    • Compact design adaptable for the new digital IBOC signal and future broadcasting requirements

The Armstrong X-1000B is a highly efficient and flexible broadcasting solution. Designed to optimize performance, ensure reliability, and integrate seamlessly with digital broadcasting technologies, this AM transmitter combines power, efficiency, and future-ready features.


Power Output:

  • X-1000B: 1KW (rated), 1,200W (capable)
  • X-500B: 500W (rated), 600W (capable)
  • Continuously adjustable
  • Three power level presets

Frequency Range: 530kHz to 1700kHz
Output Impedance: 50 ohms unbalanced, Type PL259
Modulator Type: Pulse Duration Modulation (PDM)
Audio Frequency Response: ±0.5dB, 30-10,000Hz
Square Wave Overshoot: 2% at 400 Hz
Square Wave Tilt: 3% or less at 40Hz
Audio Harmonic Distortion: Better than 1% (THD) at 95% modulation 30-10,000Hz (reduced antenna bandwidth may degrade specifications)
Audio Intermod: 1% or less at 1KW 60/7000Hz 4:1 ratio SMPTE Standards Distortion at 85% modulation
Modulation Capability: 150% (rated), 165% (capable)
Carrier Shift: Not to exceed 1%
RF Harmonics: 73dB or more below 1KW
Spurious Outputs: 73dB below 1KW
Noise and Hum: 60dB or more below 100% modulation at 1KW
Frequency Stability: ±5 ppm
Audio Input: 600 ohms active balanced +10dBm nominal
Power Input: 190-260 VAC, single phase
Power Consumption:

  • X-1000B: 1400W at 1KW 0% modulation, 1750W at 1KW 100% continuous sine wave modulation
  • X-500B: 600W at 500W 0% modulation, 900W at 500W 100% continuous sine wave modulation
    Remote Control/Monitor: DB25 Connector

Mechanical and Environmental Specifications:

  • Ambient Temperature: -10°C to 50°C
  • Humidity Range: 95% max, non-condensing
  • Altitude: 8,000 feet
  • Size: 12.25” high x 19” wide x 20” deep
  • Weight:
    • X-1000B: 132 lbs
    • X-500B: 98 lbs