R Type @ The Valve Museum

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R Type

Sensibly equivalent^¶ to:

R. TM

See also:

The Dawn of Broadcasting in the UK - M-OV NR13 Box

Extras ▼

Marconi Photographic Donation - Joe Gruber Other R Type exhibits

This is a Marconi branded Type R from the early broadcasting era and carries the R on the front and the BBC stamp on the right. The base has an outer bright shell. The large style of BBC stamp carrying the words 'Type approved by Post Master General' was introduced in November 1922.

Thanks to Joe Gruber for sending the images.

The balloon envelope is 54 mm in diameter, and excluding the B4 base pins, is 90 mm tall.

References: ¹⁰⁰⁵, ¹⁰⁰³ & ¹⁰⁰⁴. Type R Type was first introduced in 1916. See also 1916 adverts.

Pin Connections

B4	1	2	3	4
	a	g1	f	f

Absolute Maximum Operating Conditions^¶

Triode	Vh	Ah	Va
	4.0	0.65	60

Updated July 07, 2021.

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