NOTE: After spending $$$$ on tooling and various prototypes, we have fitted Special Grade Flying Leads tubes with Custom Bakelite Bases developed in-house. It is a multi-step, labor intensive process. Each lead is straightened and cleaned to ensure perfect fusion with the base pins in the soldering bath. Process is painstakingly slow, so we will be adding a few tubes at a time to the inventory.

Tubes are Plug & Play, Ready to Use, fitted with our Custom made Bakelite Bases (INTL Patent Application in Process).

TUBE BASE ON THESE IS SLIMMER, SO THAT IT WOULD WORK WITH SOCKETS WITH COLLARS IN ADDITION TO ALL REGULAR SOCKETS.

Brand New MINT NOS NIB Rare 1960 BRIMAR CV4033 Black Plate with Copper Grid Post Military tubes. Factory tested and serialized*. CV4033 Flying Lead is a Premium Grade, High Reliability Long Life version of CV4024/ECC81/12AT7 valves (Click Here). CV4033 premium grade version of the 1960s Black Plate CV4024/6060 is one of the best from Brimar in the ECC81 types. STC Rochester Plant Date Codes. Made in England.

Each tube came with sticker with hand written PM25525-1 and individual serial number (click Larger Photo). Tubes were factory tested and serialized for some qualification (PM25525-1), except we don't have specific details of the qualification.

Tested and matched on Top of the Line Calibrated Hickok 580 Lab Grade Tester. 100% is roughly 5500 mmhos on this tester for 12AT7.

Single Tube = $50. Select 2 for a Matched Pair or 4 for a Matched Quad. Even odd number of tubes will be matched.