The minimum value is 56/56 for this dual triode tube. Triode 1 has a minimum value of 56. Triode 2 has a minimum value of 56. The average new tube value is for triode 1 is 86. The average new tube value is 86 for triode 2. This tube/valve has been tested on a calibrated TV7-U. Paul Hart performed the calibration. This tube value for Triode 1 is 80. This tube value for Triode 2 is 82. That is a test result just shy of the 86/86 which is what a new tube should test. The date codes on line 1 =Gf2. The date code on line 2 is B0C4. The B stands for Mullard Blackburn factory in the UK. This is a 1954 Mullard 12au7a Dual Triode power tube / valve. This audio power dual triode tube has been labelled Philips however it is a Philips of the UK. Have a look at Wikipedia if you do not believe this. This 12au7a has a top o getter with two mica spacers. This is a Mullard and those in the know will be aware of this. That is not fair and will not be tolerated. The codes will tell you the month, week, year the tube was made and where it was made. This will be white boxed. This is a used tube. Fully tested for shorts, gas life and strength. I have hundreds of 12au7a so please add me to your favourite sellers. I will be adding more. I also have variants 5814 as well as 5963. I have far to many tubes. Have a look at the last image. That is a portion of the 12au7/12au7a Premium Audio Tubes designed for the Audiophile. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Parts & Accessories\Vintage Tubes & Tube Sockets”. The seller is “premium-audio-tubes” and is located in this country: US. This item can be shipped to United States, New Zealand, Fiji, Papua New Guinea, Wallis and Futuna, Gambia, Malaysia, Taiwan, Poland, Oman, Suriname, United Arab Emirates, Kenya, Argentina, Guinea-Bissau, Armenia, Uzbekistan, Bhutan, Senegal, Togo, Ireland, Qatar, Burundi, Netherlands, Slovakia, Slovenia, Equatorial Guinea, Thailand, Aruba, Sweden, Iceland, Macedonia, Belgium, Israel, Kuwait, Liechtenstein, Benin, Algeria, Antigua and Barbuda, Italy, Swaziland, Tanzania, Pakistan, Burkina Faso, Panama, Singapore, Kyrgyzstan, Switzerland, Djibouti, Chile, China, Mali, Botswana, Republic of Croatia, Cambodia, Indonesia, Portugal, Malta, Tajikistan, Vietnam, Cayman Islands, Paraguay, Saint Helena, Cyprus, Seychelles, Rwanda, Bangladesh, Australia, Austria, Sri Lanka, Gabon Republic, Zimbabwe, Bulgaria, Czech Republic, Norway, Côte d’Ivoire (Ivory Coast), Kiribati, Turkmenistan, Grenada, Greece, Haiti, Greenland, Yemen, Afghanistan, Montenegro, Mongolia, Nepal, Bahamas, Bahrain, United Kingdom, Bosnia and Herzegovina, Hungary, Angola, Western Samoa, France, Mozambique, Namibia, Peru, Denmark, Guatemala, Solomon Islands, Vatican City State, Sierra Leone, Nauru, Anguilla, El Salvador, Dominican Republic, Cameroon, Guyana, Azerbaijan Republic, Macau, Georgia, Tonga, San Marino, Eritrea, Saint Kitts-Nevis, Morocco, Saint Vincent and the Grenadines, Mauritania, Belize, Philippines, Democratic Republic of the Congo, Republic of the Congo, Colombia, Spain, Estonia, Bermuda, Montserrat, Zambia, South Korea, Vanuatu, Ecuador, Albania, Ethiopia, Monaco, Niger, Laos, Ghana, Cape Verde Islands, Moldova, Madagascar, Saint Pierre and Miquelon, Lebanon, Liberia, Bolivia, Maldives, Gibraltar, Hong Kong, Central African Republic, Lesotho, Nigeria, Mauritius, Saint Lucia, Jordan, Guinea, Canada, Turks and Caicos Islands, Chad, Andorra, Romania, Costa Rica, India, Mexico, Serbia, Kazakhstan, Saudi Arabia, Japan, Lithuania, Trinidad and Tobago, Malawi, Nicaragua, Finland, Tunisia, Luxembourg, Uganda, Brazil, Turkey, Germany, Egypt, Latvia, Jamaica, South Africa, Brunei Darussalam, Honduras.
- Brand: Mullard
- Type: 12Au7
- Model: Ecc82
- Country/Region of Manufacture: United Kingdom
