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 Brimar brand on the base cap. The two anode connections are made at the top to the twin vertical rods seen in the centre.
The construction is clearly indirectly heated with one side of the heater connected to the cathode. The anode connections are easily seen.The classic envelope is 44 mm in diameter and, excluding the B4 base pins, is 101 mm tall.Reference: Data-sheet. |
