The 6DS4 Nuvistor from RCA is a triode for use at VHF and built into a small metal case. The base is ceramic sealed to the metal case and five fine pins, on a 12 pin grid, form the connections and the electrode supports internally. The 6DS4 is a remote cut-off version of the 6CW4.

As well as use at VHF in radio equipment the Nuvistor was used for wideband Y amplifiers in oscilloscopes and the the high gm value is required for wide band width use. The Nuvistor was employed in audio amplifiers.

The Nuvistor is built as a series of co-axial electrodes but they are all very small, and small inter electrode capacitances result. Thus the high frequency of operation. Unlike the transistors of the time the Nuvistor had the overload and intermodulation characteristics of the valve, superior to the transistor.

The identification is stamped into the top of the envelope can.

The thin metal tube envelope is 9 mm in diameter, and excluding the base pins is 20 mm tall.

 
Pin Connections

	2	4	8	10	12
	a	g1	k	h	h

 
Absolute Maximum Operating Conditions

Triode	Vh	Ah	Va	Vg	mAa	ra	gm	μ	Pdiss
	6.3	0.135	135	0	8.0	5,400	12.5	68	1.5W

Thanks to Frank Philipse for supplying the above PDF datasheet

 

This exhibit was last updated on 09 June 2007