small signal input pentodes: EF86, EF806s, E80F, 6J32P, 6CF8, 6SH32, 6267, M8195, 6BK8, Z729, 6F22, CV2901
Noval B9A 9-Pin tube-valve-base-Röhrensockelaudio tube
Delivery time: ca. 1 - 3 days
Noval B9A 9-Pin tube-valve-base-Röhrensockel
Delivery time: ca. 1 - 5 days
EF806S S4GB selected premium tube for tube microphonesSpecially tested for low noise and stable characteristicsUsed in Neumann U67, UM57 and Gefell UM70 microphones6.3V heater, B9A noval base, selected studio grade tube
Delivery time: ca. 1 - 5 days
6267 RSD - 6267RSDNoval B9A 9-Pin tube-valve-base-Röhrensockelmade in West Europe, ideal for Quad ® AmplifiersRSD ® is a registered Trademark by BTB
Delivery time: ca. 1 - 3 days
Noval B9A 9-Pin tube valve base RöhrensockelKlang Tendenz: warm, farbenfroh, angenehm, sehr gute Räumlichkeit
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube valve base Röhrensockelmostly Tesla, RFT or ITT/Lorenz and other brands
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube-valve-base-Röhrensockelupgraded Goldpin Version (comes preselected from the JJ factory)equivalents: EF86-6267-CV2901-CV4085-CV4086-M8195
Delivery time: ca. 1 - 5 days
EF806S Tung-Sol Goldpin for tube microphonesLow-noise studio pentode for vintage audioGreat for U47 and DIY mic buildsNoval B9A; Uf 6.3V, If 0.2A; gm~7.5mA/V
Delivery time: ca. 1 - 5 days
EF806s NOS pentode = EF86, Noval B9A, Vf 6.3VFor microphone preamps, AF preamps, hi-fi and studio gearSuited to low-noise audio service, repair and replacementSocket Noval B9A, 9-pin, pentode without top cap
Delivery time: ca. 1 - 5 days
E80F special pentode, Noval B9A, Vf 6.3VFor audio preamps, electrometers, RF/IF and test gearSuited to Philips, Mullard, Valvo, lab and studio useSocket Noval B9A, 9-pin, special pentode, no top cap
Delivery time: ca. 1 - 3 days
5879 audio pentode, Noval B9A, Vf 6.3V If 0.15AFor low-noise AF preamps, microphone and amplifier circuitsSuited to studio, jukebox, guitar amps and service stockSocket Noval B9A, 9-pin, sharp-cutoff audio pentode
Delivery time: ca. 1 - 5 days
E83F studio pentode for pro audio and broadcast preampsLow-noise tube used in Telefunken V76 microphone preampGreat for line stages, phono preamps & DIY HiFi buildsNoval B9A; with top cap; Uf 6.3V; Pa~2.1W
Delivery time: ca. 1 - 5 days
3EF800 von Telefunken ist eine rauscharm? HF-Pentode mit SonderqualitätSie eignet sich für Audio-, Breitband-, ZF- und Videoverstärker.Hohe Linearität und stabile Kennlinien sichern präzisen Betrieb.Bekannt für Zuverlässigkeit, geringe Mikrofonie und lange LebensdauerEF800 by Telefunken is a low-noise RF pentode of special qualityIt is suited for wideband, IF, and video amplifier applications.High linearity and stable curves ensure precise operation.with <> in the glas bottom
Delivery time: ca. 1 - 5 days
EF800 high-end pentode for radio and HiFiPremium selected version of EF80Used in BTB 8-cylinder tube projectNoval B9A; Uf 6.3V, If 0.3A; gm~7mA/V
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube-valve-base-RöhrensockelKlangtendenz EF 86 TFK: offen, schnell, super Auflösung
Delivery time: ca. 1 - 5 days
West NOS Pentode with warm and tight High-End Audio Qualityoften used in Quad Amplifiers and in Studio equipment
Delivery time: ca. 1 - 3 days
Noval 9-pin tube baseThe EF806s JJ is is high Gain Audio Pentode for low Signal applicationsequivalents: EF86-6267-CV2901-CV4085-CV4086-M8195
Delivery time: ca. 1 - 5 days
EF86 / EF806s preamp tubes – audio pentodes for amplifier design: selection, interchangeability, and applications
What is an EF86 and what is it used for?
The EF86 is an audio pentode (small-signal pentode) used as a voltage-amplifying input stage in tube circuits. It is found in hi-fi preamps, studio microphones, studio electronics, and tape machines when high gain, good resolution, and a well-defined operating point are required.
Typical positions include V1/input stages, microphone or line preamp stages, and specialized phono or driver stages where a pentode can offer advantages over a triode in gain and circuit flexibility. In practice, the EF86 is also known for being more sensitive to microphonics and mechanical vibration than many double-triode types, so tube selection and mounting can matter.
What is the EF806s, and why is it considered a robust EF86 variant?
The EF806s is a version within the EF86 family specified for demanding applications, designed for stable operation and reduced susceptibility to interference. It is often chosen when low microphonics, reproducible electrical parameters, and long-term stability are required in the input stage, and it is therefore frequently found in high-end equipment in place of a standard EF86.
A special case is EF806s S4GB, which is optimized and selected specifically for tube microphones. In tube microphone circuits, it can be used as an upgrade replacement for EF86 and for 6J32P (6SH32P) where the design supports the EF86-family operating conditions.
For end users, this means that an EF806s can be a pragmatic choice in sensitive guitar amps or hi-fi preamps if noise, ringing, or parameter spread becomes noticeable. For workshops and OEM applications, a more robust variant can reduce service effort and improve consistency across multiple devices.
Which names belong to the family: E80F, 6J32P, 6267, 6CF8 and 6SH32?
The EF86 “type world” includes several designations depending on origin and documentation. 6267 is a common international designation, while 6J32P is used as an Eastern European (e.g., Russian) designation.
E80F is a closely related small-signal pentode sometimes discussed as a high-end alternative, but it is not always a guaranteed 1:1 substitute in every EF86 design because operating points and parameters can differ. Names such as 6CF8 and 6SH32 also appear as closely related or drop-in relatives in many contexts, depending on the exact implementation and device specification.
Are EF86, EF806s, E80F and 6J32P interchangeable, and where are the exceptions?
EF86, 6267, 6J32P and EF806s are generally considered directly interchangeable because they belong to the same core family and are used as drop-in options in many devices. In sensitive positions (microphones, phono, very high-gain input stages), the practical “fit” can still depend on microphonics, noise level, and the circuit’s specific operating point.
E80F should not be assumed as a universal drop-in replacement in every EF86 circuit. If an E80F is used as an alternative, the safe approach is to verify heater requirements, pinout usage, and the intended operating point against the device design or manufacturer approval.
What about availability, shipping, and spare-part supply in Germany/Europe?
EF86 and EF806s are currently manufactured, while 6J32P and 6267 are NOS tubes. For Germany and Europe, stable availability matters because hi-fi components, studio gear, and microphone electronics are often maintained over long service lifetimes.
End customers benefit from clear type identification and practical selection guidance, while professional users rely on consistent specifications and predictable procurement. International shipping is relevant for export equipment and globally supported service cases outside Europe.