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Amperex European Vacuum Tube Boxes Dates Logoscode date is 1966. No date written in white letters. 6CA4/EZ81 code:??? B7I2 Blackburn Mullard. 2 seams at top. (1 06) in orange marking 6th week of 1971. Evidently this tube sat for 4 years before being boxed. Orange globe logo on tube. Note that this box has North American Philips written on it. 6X4/EZ90. code:YY5 P8G1. P is Papesa,Buenos
Mar 25, 2004 · The tube says "MADE IN HOLLAND," so it is a Mullard-branded, Philips-manufactured 12AT7/ECC81. The seller's claim is probably correct. This tube is very old. I have one just like this with "1950" date code, so I wouldn't be surprised if this tube
BRIMAR VALVE TYPE & DATE CODES - MULLARD MAGICAccordingly, we have produced the handy table below to use for common Brimar audio devices:- Mullard-Philips RETMA Military Pre 1960 code Post 1960 code 12BH7 12BH7 585 1585 6V6GT 6V6GT CV511 422 1422 6X5GT 6X5GT 432 1432 E83CC 12AX7WA CV4004, 6057 977 1977 ECC804 6GA8 6/30L2 195 2195 ECC81 12AT7 CV4024 160 2160 ECC81 12AT7 CV4024
CV NUMBERS AND UK MILITARY DATE AND FACTORY CODES The second part of the alpha code identifies the factory that manufactured the device, the most commonly seen codes and their corresponding manufacturers are:- A Mullard, Blackburn, pre Jan 1951 A Thorn, Tottenham, pre April 1964 AB Sylvania-Thorn, Enfield AC Brimar - Thorn-AEI, Footscray AD Brimar - Thorn-AEI , Rochester B Edison Swan, Baldock
Mullard 5751 Mullard 5751
PHILIPS FACTORY VALVE CODES - Frank's electron Tube Page 5 7 Philips, Eindhoven Radio valve lab. physics group. Hitachi, Japan 7 Electrical and Musical Industries. (Mullard supply) 8 Philips, Eindhoven. Radio valve lab. glass group 9 Philips, Heerlen Radio valve lab. receiving valve technology group. + Philips, Sittard afd 22126 P La Radiotechnique, Clichy (Neotron) U Amperex Electronic Corp., New York % Philips
Philips (etceteras) date codes - Tubes for Hifi AudioGf0 D0K = Gf > ECC82, 0 > change code 0, D > Valvo Hamburg, 0 > 1960, K > November. rX2 B2J5 = rX > EL84, 2 > change_code 2, B > Blackburn Mullard, 2J5 > 1962 October 5th week. Note:Siemens never used week codes. After ± 1968 Siemens used metal tags inside the tube on the getter support in which the code was stamped. Factory codes
Pope, Valvo, Adzam, Amperex, Mullard, Miniwatt Dario, and Radiotechnique were all names owned by Philips Holland. The respective names typically referred to factories. For instance, Mullard operated in England, Valvo in Germany, Amperex in the U.S.A., and Radiotechnique in France. In the case of Adzam and Pope, these w
Philips Holland Factories Upscale AudioPope, Valvo, Adzam, Amperex, Mullard, Miniwatt Dario, and Radiotechnique were all names owned by Philips Holland. The respective names typically referred to factories. For instance, Mullard operated in England, Valvo in Germany, Amperex in the U.S.A., and Radiotechnique in France. In the case of Adzam and Pope, these w
TUBES NOS NIB VALVO - audioantiquaryAll tubes proposed by Audiogears will have a unique code that will allow us to locate them in time and retrieve the test done before the sale even after many years The results collected will be printed on a label on the box of each tube together the factory codes basic measures and the unique code Audiogears. The tubes will be selected
(Valvo Amperex Mullard) Logos and Labels. Characteristics. Understand Codes. Common Labels Label Colors. ECC81. ECC82 ECC83 E88CC. EF86. EL34. EL84. EZ80/81. GZ34. Other Tubes. Read and understand the codes . . . The codes are written in two lines on standard tubes and in two rows on special tubes (as E88CC) on the glass close to the base
Tube enthusiast:know your tube codes. - EffectrodeMore in-depth information on how to identify Mullard, Philips and other European tube types such as Amperex and Valvo can be found on Brent Jessee Recording & Supply website or by referring to this old Philips tube code list. Any additional information on this subject, especially the engineering codes is most welcome.
VALVO was an old and renowned german - Vacuum TUBE for what i know, VALVO tubes were manufactured exclusively by VALVO GmbH in Hamburg,- labeling is a wole different story. the factory or company which supplied a tube sold under the names Philips/VALVO/Mullard can be read off from the PVM date-code:e.g. "D" stands for VALVO/Hamburg, "B"
Mullard in Australia also used a straight 3 digit number code that was a 2 digit year code with the month being last - YYM - but this was not a generally used code. Note:The following applies to Mullard & Philips tubes made after 1956, prior to this the manufacturers used a change code.
Valvo/Mullard ECC81 Tube/12AT7 PreAmp Audio Tube, VF3 Code Details about Valvo/Mullard ECC81 Tube/12AT7 PreAmp Audio Tube, VF3 Code, 2 Röhren ECC83 Valvo Mullard Amperex Philips Holland 12AX7 Herleen I65 ^6. $58.77 ($29.39/Einheit) + shipping. 1 pc "Valvo" ECC81 / 12AT7 radio and audio tube, made by Mullard UK, VF3 code, new old stock in original box.
mullard philips tube designation :definition of mullard In Europe, the principal method of numbering vacuum tubes (or "thermionic valves", as they were often referred to in Europe and Australia, etc.) was the nomenclature developed and used by Mullard in the UK and applied Europe-wide thanks to their parentage by Philips who had subsidiaries in Germany (Valvo) and France (), plus the support of Telefunken, from 1934.