PRC-77 A21 1st IF-Amplifier Module

A21 1st IF Amplifier Circuit Module (Receiver)

The Circuit Module A21 is the first intermediate frequency amplifier stage (1st IF Amplifier) for the PRC-77 / RT-841 radio set. It is a core assembly within the receiver circuit and essential for the first IF signal amplification.

A defect in the A21 often results in poor receiver sensitivity or an excessively weak audio signal, even when the preceding RF stages are functioning correctly.

📦 Product Features:

• Nomenclature: Circuit Module A21 (1st IF Amplifier)
• Compatibility: US Military Radio PRC-77 / RT-841
• Condition: New Old Stock (NOS) – Genuine Military Spare Part
• NSN: 5820-00-930-3733
• Function: First Intermediate Frequency (IF) Amplifier Stage

🚚 Shipping & Availability:

• ✅ In Stock – Ready for immediate dispatch
• ✅ Worldwide Shipping