PRC-77 A40 Interval-Oscillator Module 

A40 Interval-Oscillator Circuit Module (Oscillator)

The Circuit Module A40 is the Interval Oscillator for the PRC-77 / RT-841 radio set. It is a core assembly within the transmitter section responsible for stable generation of transmit frequencies in the interval range.

A defect in the A40 often leads to problems with frequency selection, an unstable transmit frequency, or a complete transmission failure (No TX) because the necessary oscillator signal for the mixer stages is missing.

📦 Product Features:

• Nomenclature: Circuit Module A40 (Interval-Oscillator)
• Compatibility: US Military Radio PRC-77 / RT-841
• Condition: New Old Stock (NOS) – Genuine Military Spare Part
• FSN / NSN: 5820-930-3741 (5820-00-930-3741)
• Function: Interval frequency generation in the transmitter section

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