The R3 is a directly heated full wave rectifier. The cathode has limited peak current capacity and thus the reservoir capacitor is limited to 4 μF.
The individual sections have perforated anodes.
The Brimar name on the base cap. The central rods connect to the anodes above the top mica by tape strips that can be seen in the image.The classic envelope is 44 mm in diameter and, excluding the B4 base pins, is 103 mm tall.Reference: Data-sheet. |
