EF86
The EF86 is a high transconductance sharp cutoff pentode vacuum tube with Noval (B9A) base for audio-frequency applications. It was introduced by the Mullard company in 1953 and was produced by Philips, Mullard, Telefunken, Valvo, and GEC among others. It is very similar electrically to the octal base EF37A and the Rimlock base EF40. Unlike many pentodes it was designed specifically for audio applications, low noise and low microphony being claimed advantages, although a rubber-mounted vibration-resistant base was still recommended. It has much higher stage gain than any triode, which makes it susceptible to microphony. The EF86 was used in many preamplifier designs during the last decades of vacuum tube hi-fi development. An industrial variant of the tube is known as 6267. In the former
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EF86
The EF86 is a high transconductance sharp cutoff pentode vacuum tube with Noval (B9A) base for audio-frequency applications. It was introduced by the Mullard company in 1953 and was produced by Philips, Mullard, Telefunken, Valvo, and GEC among others. It is very similar electrically to the octal base EF37A and the Rimlock base EF40. Unlike many pentodes it was designed specifically for audio applications, low noise and low microphony being claimed advantages, although a rubber-mounted vibration-resistant base was still recommended. It has much higher stage gain than any triode, which makes it susceptible to microphony. The EF86 was used in many preamplifier designs during the last decades of vacuum tube hi-fi development. An industrial variant of the tube is known as 6267. In the former
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Die Elektronenröhre EF86 ist e ...... 40 und hat einen Noval-Sockel.
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EF86 es un pentodo de bajo rui ...... lificadores para reproducción.
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The EF86 is a high transconduc ...... J Electronic (formerly Tesla).
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caption
Four EF86-type tubes
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cathode type
Indirectly heated
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class a amplification factor
class a screen voltage
classification
Pentode
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filament current
filament voltage
max current
max dissipation
pinout
B9A
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service
Audio frequency
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hypernym
comment
Die Elektronenröhre EF86 ist e ...... 40 und hat einen Noval-Sockel.
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EF86 es un pentodo de bajo rui ...... lificadores para reproducción.
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The EF86 is a high transconduc ...... known as 6267. In the former
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label
EF86
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EF86
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EF86
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