Matched Code Pair Philips ECG Aerospace BLUE JAN 6U8A NOS Tubes 

Premium Selection Tubes with tighter tolerances, extended life (10,000-hour rating)—suited for harsh environments like avionics.  These tubes excel in audio upgrades today due to low noise and durability.

​Similar to 6U8 with controlled heater warm-up and increased heater to cathode voltage. 

New in Original Boxes

Fully Tested & Guaranteed as Pictured & Described

Tested and Matched Closely on Hickok 600A

Tubes will be packed securely and shipped via Canada Post Air Parcel (Canada); USPS Priority (USA); Asendia Global Tracking (Europe / Asia) 

Please email with any questions before bidding.