▼ Menu

    
Extras ▼

The 6AM4 UHF triode is designed for grounded grid operation to ensure the maximum isolation between input and output circuits. The grid has many connections in order to approximate to a ring. The article on valves for bands III, IV & V gives details of the construction of the 6AM4 that builds a sensibly planar valve into a B9A envelope.

The gold-plated pins indicate that this is a relatively modern specimen (1980s? and suggest professional usage in communications link equipment eg. on a microwave link tower. This is not your average TV valve! but it was originally designed as such.

The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 37 mm tall.

References: Data-sheet & ¹⁰⁴⁰ Type 6AM4 was first introduced in 1954. See also 1954 adverts.

Pin Connections

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.