B36 Osram and Marconi brown base square getter 12SN7GT double triode code LK 4 and LM 4
B36 Marconi and Osram £ 150 pair.
Description
The B36 is an audio double triode with a 12.6 Volt heater. It is a British (M-OV) copy of the American 12SN7.
The construction uses a glass pinch and two separate electrode structures are visible within the glass.
The B36 was designed for audio applications and the valve has independent cathodes. The B65 differs only in heater voltage and current.
The wide glass tube envelope is 28 mm in diameter and excluding the IO base pin length, stands 71 mm high.
The B36 here shown are an Osram and a Marconi with square getter with codes LK 4 and LM 4
They have been tested with AVO VCM 163 with the following measurements:
B36 Osram tested 7mA/10mA 75%/100% emission
B36 Marconi tested 8.5mA/10mA 80%/100% emission
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