Summary

Pentode- diode- diode; the diodes in this valve were designed for use as the signal detector and automatic gain control rectifier in radio receivers, the remote cut-off pentode section was designed for use as the I.F. amplifier. It could also be used as a resistance coupled audio amplifier following the detector and in reflex circuits could perform both roles.

The 6G8G was originally produced by AWV in 1937; it was the octal based version of the 6B7S. It was not registered with the Radio Manufacturers Association (RMA) in the United States and appears never to have been made there. It was popular in Australia and was second sourced by Philips as attested by this example.
The 'K55' date stamp is not the standard Philips code but it does suggest that the valve was made in 1955. The excise stamp indicates that it was made in South Australia before the end of 1960 and since Philips commenced manufacture there in 1946, the date of manufacture must have been between 1946 and 1960..

6.3 volt indirectly heated cathode.

Manufacturer: Philips, Hendon South Australia

Physical Description

Base type: octal No. of pins in base: 8 Bulb shape: shouldered Bulb material: glass Top cap

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