WWII CN-25/UPA-1 Attenuator – U.S. Military Radar Test Component

Offered here is an original WWII-era U.S. military attenuator, marked:

“CN-25/UPA-1 Attenuator”

This component was used in radar and electronic test setups to control or reduce signal strength—an essential part of calibration and testing equipment for aircraft and ground radar systems.

🔍 Details:

• Model: CN-25/UPA-1
• Type: Signal Attenuator
• Era: WWII (1940s)
• Construction: Machined metal body with original connectors
• Connector Type: Military coaxial fittings (Amphenol style)
• Markings: Clearly labeled data plate with serial/part numbers

📦 Condition:

• Untested
• Original finish with light oxidation and age wear
• Connectors intact with good threads
• No major damage or modifications
• Displays well with clear markings

💡 Collector Notes:

• Used in radar calibration and signal testing systems
• Compact but highly specialized component
• Great for:
  
• WWII electronics collections
• Radar system builds/displays
• Signal Corps / aviation displays
• Smaller components like this are often missing from larger setups, making them desirable to collectors completing systems

🚚 Shipping & Terms:

• Small, easy-to-ship item
• Ships securely or available for pickup at Whiskey Rebellion Antiques – Bedford, PA

FREE SHIPPING!