as a guide only – please refer to original manufacturers data sheets to ensure that a substitute is safe and appropriate for your application. ECC85 Ratings. Page 1. Page 2. Page 3. ECC85 Datasheet PDF Download – Double Triode, ECC85 data sheet.

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Many later tubes were designated one to three semi-intuitive letters, followed by a number containing the heater voltage. Most of these are special quality versions of the equivalents given.

Heater or filament rating [1]. Structure and usage [31]. Daatsheet of the following tubes are designed to operate with their heaters connected directly to the volt now volt electrical mains of North America. Vacuum tubes produced in the former Soviet Union and in present-day Russia are designated in Cyrillic. Retrieved 4 March Archived from the original PDF on 9 March Retrieved 4 November Special quality variants may have the letters “SQ” appended, or the device description letters may be swapped with the numerals e.

(PDF) ECC85 Datasheet download

You will find thousands of tubes or valves with interesting links. Federal communication laboratoriesInc. Other compound numbering systems were used to mark higher-reliability types used in industrial or commercial applications. Retrieved 17 May Retrieved 14 December All of them catasheet indirectly heated cathodes.


Collection of Bartosz Szwed GB. Collection of Miguel Lopez C. Receiving Tube Manual RC30p. Collection of Jacob Roschy D.

ECC85 Datasheet, PDF – Alldatasheet

The third element is a sequentially assigned number that distinguishes between different devices of the same type. Collection of Guido Pedrali Noy Datsheet. Archived from the original PDF on 12 October Better, often dual, getters were implemented to maintain a better vacuum, and more-rigid electrode supports introduced to reduce microphonics and improve vibration and shock resistance.

Collection of Werner Wussow D. Datasheey, the British also had two entirely different “VT” nomenclatures, one used by the Royal Air Force see the preceding section and the other used by the General Post Officeresponsible for post and telecommunications at the time, where it may have stood for “valve, telephone”; none of these schemes corresponded in any way with each other.

Golden Middle: datasheets of NOS vacuum tubes

United States Naval Research Laboratory. Receiving Tube Manual RC21p. Receiving tubes have heaters or filaments intended for direct battery operation, parallel operation off a dedicated winding on a supply transformer, or series string operation on transformer-less sets.

Retrieved 9 May Collection of Georges Werts B. Media related to Philips vacuum tubes at Wikimedia Commons. Cumings 8 June Views Read Edit View history. Retrieved 10 September Pro Electron maintained a subset of the M-P system after their establishment inwith only the first letters EP for the heater, only the second letters ABCDEFHKLMYZ for the type, and issuing only three-digit numbers starting with 123589 for the cec85.


Media related to Lamina gas discharge tubes at Wikimedia Commons.

This system prefixes a three- or four-digit number with the letters “CV”, meaning “civilian valve” i. One system prefixes a three-digit number with the letters “VT”, presumably meaning “Vacuum Tube”. Retrieved 25 December Devices in the low s tend to be transmitter output types, eatasheet in the higher s are not vacuum tubes, but gas-filled rectifiers and thyratronsand those in the s tend to be special-purpose and high-frequency devices.

Three- and four-digit numeral-only systems were maintained by R. Literature “Telefunken Laborbuch Band 1 Taschenbuch hellblau “.

Since with a Faravahar logo related to Ahura Mazda: Media related to Eimac vacuum tubes at Wikimedia Commons. For phototubes and photomultipliers, the second element is a sequential number and then a datasheeet code identifying vacuum or gas fill and the type of cathode.

Retrieved 19 November For examples see below. Retrieved 19 January