given as a guide only – please refer to original manufacturers data sheets to ensure that a substitute is safe and appropriate for your application. EF86 Ratings. TECHNICAL DATA. Characteristics of a bogey tube: Electrical. Heater Voltage ( AC or DC) in Volts. +/ Heater Current in mA. +/- 10%. Page 1. Page 2. Page 3. Page 4. Page 5. Page 6. Page 7. Page 8.

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This exhibit was made by Mullard who designed the EF Collection of Marco Lagendijk NL.

You even can look up radio models with a certain tube line up. Collection of Karlheinz Fischer D. Collection of Ekkehard Pfau D. In other projects Wikimedia Commons. Type EF86 was first introduced in This can be further reduced by centre tapping the heater to earth. Collection of Karl – Heinz Bossan D.

In use it is recommended that it is fitted into a vibration resistant base. The EF86 was used in many preamplifier designs during the last decades of vacuum tube hi-fi development. EF86 Daat EFtype tubes. Its design is low xheet and anti-microphonic.

Under these conditions the maximum hum level is 1. The EF86 is the standard early stage audio pre-amplifier valve. Collection of Georges Werts B.

(PDF) EF86 Datasheet download

At higher frequencies the effect ef68 vibration is usually negligible on account of the damping provided by the chassis and the valve holder. In high gain applications such as tape recording care should be taken in siting the valve, particularly when a loudspeaker is zheet in the same cabinet or where a motor is mounted on the same chassis.


The low level of hum attained with this valve can be completely masked by that due to an unsuitable valve-holder, in which excessive leakage and capacitive coupling between pins will introduce considerable hum. The UF86 is identical with the exception of a This has a synthetic rubber mount.

This electronics-related article is a stub. 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. Collection of Jacob Roschy D.

Collection of Tomasz Szczesniak PL. Collection of Hermann Fleischanderl A. Saba Meersburg Automatik 7 und Freiburg automatik 7 von Vacuum tubes Guitar amplification tubes Electronics stubs. By using this site, you agree to the Terms of Use and Privacy Policy. Collection JR Jacob Roschy. Antique radios, Old Time Radios. Retrieved from ” sehet It was first shown at the Radio Show and first used in their amplifier from Collection of Klemens Rhode D.

Collection of Bekir Yurdakul F. Collection of Daniel Consales D. Collection of Bruno Candreia CH. You reach this tube or valve page from a search after clicking the “tubes” tab or by clicking a tube on a radio model page. Care in the design of the valve to ensure that the electrode structure shete its mounting are as sheeet as possible has reduced the microphony of the EF86 to a very low level.


The rarely used EF83 shwet a remote-cutoff pentode [4] shete similar to the EF86; the remote cutoff variable mu makes it suitable for applications such as automatic gain control agc in tape recorders. From Wikipedia, the free encyclopedia.

Although used in circuits such as tape recorder input stages and instrument amplifiers, microphony can be a problem, even when mounted in a vibration-reducing valve holder. Collection of Reinhard Riek D. Collection of Dennis Jaroschek D.

Quantity of Models at Radiomuseum. You can help Wikipedia by expanding it.

EF86 @ The Valve Museum

PF86 ; UF86 Other base and data slightly different: This page was last edited on 1 Novemberat RTT Franzis An industrial variant of the tube is known as Zheet of Massimo Pedrina I. Collection of Tor Steinnes N. Articles containing potentially dated statements from All articles containing potentially dated statements All stub articles. Collection et86 Ralf Meinke D. The landmark amplifier designs from Mullard’s application laboratories all specified the EF86, and today it is still the valve of choice for this work.

Collection of Christian Schaufelberger CH.

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