ZD17 @ The Valve Museum

▼ Menu

Home Search Indexes Equivalents Articles Adverts & Boxes Timeline Collections Donate Contact

ZD17

Sensibly equivalent^¶ to:

1FD9 1S5 CV784 DAF91

Extras ▼

Marconi Photographic Donation - Mark Mallison Other ZD17 exhibits

The ZD17 is a diode pentode valve was designed for battery portable radio receivers where the diode acts as the signal detector and the amplifier pentode is the first audio stage. This short grid base pentode was designed with particular reference to audio amplification.

The 1.4 Volt filament is to be run from a dry cell and the 90 Volt anode rating matches standard HT batteries.

Below the bright anode the open pitch of the suppressor grid can be seen.

Thanks to Mark Mallison for sending the images.

The thin glass tube envelope measures mm in diameter and the excluding the B7G base pins, is mm tall.

Reference: Data-sheet. Type ZD17 was first introduced in 1953. See also 1953 adverts.

Pin Connections

B7G	1	2	3	4	5	6	7
	f-	nc	a(d)	g2	a	g1	f+

Absolute Maximum Operating Conditions^¶

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	1.4	0.05	90	90	0	2.7	0.63	0.5M	0.72

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated October 13, 2019.

Return to Main Index