Offered is a lot of (3) NOS 6AL5/6663 Twin Diode tubes. Clean and in good condition, each is tested good on the EICO dynamic tester and they show no shorts or inter-element leakage. They have clear printed graphics and clean original cartons. Matching date codes are as follows: 53-48. These types were used as detectors in FM and TV tuning circuits.  Grab them for your own Hi Fi gear or TV's.  Mouse over the photo images to zoom in. NO RESERVE!! Thanks for looking.