The D1 is an all glass signal diode. It was especially designed with very low inter-electrode capacitances to function as a video detector for VHF television. This would have been a signal of up to 3 MHz bandwidth. These characteristics made it a natural choice for RADAR systems where diode detection was employed.

The shaped anode plates leave a tubular hole for the cathode assembly. The anode plate fins clamp round support rods for stability. Mica top and bottom plates complete the construction.

As well as 3 pin bases these small signal diodes were also held in plastic housings similar to fuse holders. The valve would push horizontally into the clips at both ends of the B3G valve holder.

The pip tip to pin tip length is 45 mm, diameter of glass is 11 mm.

 
Pin Connections

B3G	1	2	3	tc
	h	k	h	a

 
Absolute Maximum Operating Conditions

Diode	Vh	Ah	Va	mAa
	4.0	0.2	125	5

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 05 July 2007 {find valves by name}