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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These tubes had metal particles sprayed onto the glass envelope, copying a design common to European tubes of the time. It consisted of one or two letters designating system type andoptionally, type of cathodea hyphen, then a sequentially assigned number with up to 3 digits.
This system consists of one or more letters followed by a sequentially assigned number . Retrieved 1 May It was phased out after when Philips datwsheet the Mullard—Philips scheme. Media related dxtasheet Tungsram vacuum tubes at Wikimedia Commons. Valvo deit was a major German electronic components manufacturer from to ; a Philips subsidiary sinceValvo was one of the predecessors of NXP Semiconductors.
Some specify which end of the filament is to be powered by the positive side of the filament power supply usually a battery. The first letter or letter pair, in the case of a dual-system device indicates the general type:. Media related to Tesla gas discharge tubes at Wikimedia Commons. From Wikipedia, the free encyclopedia. Since with a fire pot logo: Collection of Christian Schaufelberger CH.
If two devices share the same type designation other than the first letter e. Special-quality cold-cathode “Z” tubes had a different function letter scheme. Media related to Soviet vacuum tubes at Wikimedia Commons.
Retrieved 4 March Retrieved 29 August Collection datasheett Jacob Roschy D. They were usually special-quality versions of standard types. Light bulbs since under the Belgian Mazda brand Electronic tubes since under the Adzam “Mazda” spelled backwards brand .
Datashee of Radio Engineers. The numbers following these prefixes can be “special” four-digit numbers, or domestic two- or three-digit numbers or simply the domestic North American “RETMA” numbering system. Retrieved 9 May Text in other languages may differ. Media related to Mullard vacuum tubes at Wikimedia Commons.
ECC85 Datasheet PDF ( Pinout ) – Double Triode Intended
Further Roman letters, up to three, describe the device followed by one to four numerals assigned in a semi-chronological order of type development within number ranges assigned to different base types.
The numbers identify special-quality valves though SQ valves CV numbered before that rule came in retain their original CV number. Media related to Soviet gas discharge tubes at Wikimedia Commons.
Collection of Guido Pedrali Noy I. However, device numbers do not reveal any similarity between different type families; e. Vacuum tubes which had special qualities French: The first element is a number specifying filament voltage. Many later tubes were designated one to ecx85 semi-intuitive letters, followed by a number containing the heater voltage.
Collection of Franco Antolini I. Archived from the original PDF on 9 March Type, subset of the Mullard—Philips system. Wynn-Williams 2 May This part dates back to the joint valve code key German: Media related to Valvo vacuum tubes at Wikimedia Commons. There are quite a number of these systems from different geographical realms, such as those used on devices from contemporary Russian and Chinese production. 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.
ECC85 Datasheet PDF
One system prefixes a three-digit number with the letters “VT”, presumably meaning “Vacuum Tube”. Then a dahasheet “-“followed by a sequentially assigned number or the designation of the American original. Type, subset of the Mullard—Philips scheme.
ECL82, PCL82, UCL82 they will usually be identical except for heater specifications; however there are exceptions, particularly with output types for example, both the PL84 and UL84 differ significantly from the EL84 in certain major characteristics, although they have the same pinout and similar power rating. Retrieved 15 June For phototubes and photomultipliers, the second element is a sequential number and then a letter code identifying vacuum dataseet gas fill and the type of cathode.
Used in s home radios powered by dry cells filaments and storage batteries B-plus voltage. Retrieved 9 Feb The E91H is a special heptode with a datasyeet third grid designed to reduce secondary emission; this device was used dataheet a “gate”, allowing or blocking pulses applied to the first, control grid by changing the voltage on the third grid, in early computer circuits similar in function to the U.
JIS C was published in and modified in and .