The R3 is not listed, its as if it did not exist. The R3 that is listed is a Full Wave Rectifier. This valve has to be a replacement as the envelope clearly shows that it is gettered. The electrodes are obscured but looking in from the base, a horizontal R style assembly can be seen.The etched markings on the main picture show a triangle with an M at the top and the R3 below.![](../pics/aaj0006a.jpg)
The picture above shows the pinch and the base pins.The wide glass tube envelope is 30 mm in diameter, and excluding the B4 base pins, is 65 mm tall.Reference: Observation. |
Updated January 17, 2013.
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