This double diode appears to have a cylindrical anode, but in fact the visible cylinder is a screen strapped internally to the cathode. Within the screen are two small anodes mounted vertically around the cathode.![](../pics/aaa0568a.jpg)
The bright screen with stitched side flanges.![](../pics/aaa0568b.jpg)
The heater has four insulated strands within the cathode tube.The classic envelope is 38 mm in diameter and, excluding the B5 base pins, is 90 mm tall.References: Data-sheet & 1043. Type 10D1 was first introduced in 1936. See also 1936 adverts. |