H.F Crystal Marker - Calibrator

Precision Frequency Calibration from 32MHz Down to 62.5kHz

Achieve accurate, reliable calibration across the entire HF spectrum and beyond with this versatile crystal marker generator. Unlike traditional calibrators that offer limited marker intervals, this unit provides a comprehensive suite of output frequencies to meet all your alignment needs.

Key Output Frequencies:

32 MHz, 16 MHz, 8 MHz – Strong, unmistakable harmonic markers for the upper HF bands

4 MHz, 2 MHz, 1 MHz – Primary reference points for general receiver calibration

500 kHz, 250 kHz, 125 kHz – Finer interpolation for improved dial accuracy

62.5 kHz – Fine-resolution markers for precise low-frequency and medium-wave calibration

Crystal-Controlled Accuracy

Built around a high-stability quartz crystal oscillator, this calibrator delivers rock-solid frequency references that won't drift. The fundamental frequency is divided down through precision CMOS logic to generate the full range of marker outputs, eliminating the need for multiple crystals while maintaining exceptional accuracy.

The Board has two outputs,

• RAW - where the signal is derived directly from the buffer.
• SPIKE- Where the signal is fed to a two stage transistor notch/spike circuit

Output is available on pads and BNC selectable from the jumper.

Ideal for:
Shortwave and HF receiver dial calibration

Frequency counter verification

Signal generator alignment

Oscilloscope timebase calibration

General laboratory frequency reference

The output provides strong harmonics well beyond the fundamental range, making it suitable for calibrating equipment up to VHF frequencies. For simple zero-beat detection, the unmodulated carrier works perfectly with receivers incorporating a BFO (beat frequency oscillator).

Specifications:
Frequency Outputs: 32MHz, 16MHz, 8MHz, 4MHz, 2MHz, 1MHz, 500kHz, 250kHz, 125kHz, 62.5kHz (switch-selectable)

Frequency Accuracy: Crystal-stabilized, adjustable via precision trimmer capacitor

Output Type: Strong square-wave markers with rich harmonic content

Power Requirements: 9-12V DC

Connections: BNC output jack

Supplied ready built and tested before it is shipped 

Order Today
Whether you're restoring vintage communications receivers or maintaining modern test equipment, this crystal marker calibrator provides the precision you need at a practical price.