Vintage Triad F-51X filament transformer. Secondary 6.3 volts 2 amps, 5.0 volts 2 amps, primary 115 volts 60 Hz. Secondaries have a common lead. About 3.25 inches by 2.25 inches by 2 inches, 1 pounds 3 ounces.
Shipping can be combined with other parts and tubes from my ebay store for savings. Add to cart then request total.