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The 6L6 is a beam-tetrode in a metal enclosure, developed in the mid-1930s by
RCA for use in (audio) power amplifiers. It is believed to be the first true
aligned-grid beam tetrode to have become available commercially in 1935.
The design of the beam tetrode circumvents certain Philips power pentode
patents [1].
During and after WWII, the 6L6 was a popular valve for the PA-stage
of a (clandestine) short wave transmitter.
The glass variant of the valve is known as 6L6G.
The 6V6 is a derivative of the 6L6. It has the same pin layout,
but produces less output power.
➤ 6L6 datasheet
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Only the initial version of the 6L6 had a metal enclosure. All other
versions had a glass body (denoted by the letter 'G' in the model number).
Over time, several variants of the 6L6G were released with increased
specifications, in particular a higher plate voltage.
Known variants are:
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6L6 Original metal version 6L6G Glass version - 6L6GX
- 6L6GA
- 6L6GAY
6L6WGA 5932 - 6L6GB
- 6L6GC
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W = Designed to withstand greater vibration and impact.
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Y = Micanol used as insulating material for the base.
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© Crypto Museum. Created: Monday 10 May 2021. Last changed: Sunday, 14 July 2024 - 07:10 CET.
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