{"title":"ECC83, 12AX7, 6057, B339, CV492, CV4004, M8137, VX7059, SNALL SIGNAL, B9A","description":"\u003cp class=\"MsoNormal\"\u003eThe most versatile B9A twin-triode valve in history saw the commercial light of day during early 1948. Developed by R.C.A at their Harrison, New Jersey facility in the USA. At its introduction, it was heralded as the first twin-triode device engineered for high gain, low noise applications. This versatility represented vast business and the giant Philip - Mullard conglomerate watched from the wings awaiting a slice of the action!!\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003ePhilips tasked its famous R and D department to work with the goal to develop the best ECC83\/12AX7 type made. Almost obsessive detail to control grid windings, electrode metallurgy quality control and enhancement of cathode emissive materials achieved during the 1950's resulted in the much-feted Mullard ECC83\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eThe ECC83 high impedance amplifier triode was designed specifically for audio use and has a high amplification factor of 100. Mullard describe the ECC83 as a high mu double triode, having separate cathodes, primarily intended for use as a resistance-coupled amplifier or phase inverter.\u003cspan\u003e  \u003c\/span\u003ePhysical dimensions for the ECC83 are as stated: - envelope of 21 mm diameter and of thin glass wall construction.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eThis valve type is extensively used in today’s designs of hi-fi audio amplifiers in very much the same way as they found use in the Mullard and other classic audio amplification designs of the 1950s and 1960s with the valve's two triode sections being used as second stage amplification and cathode coupled phase splitter - the phase splitter being required so that the push-pull output stage was driven correctly.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/eccxx.png?v=1756452026\" alt=\"\" width=\"421\" height=\"246\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/qw_large.jpg?v=1484844264\" alt=\"\" width=\"316\" height=\"719\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'arial black', 'avant garde';\"\u003e \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/0002587_ecc83-12ax7-cv4004-cv492-b339-m8137-6057-vx7059-twin-triode-valve-various-manufacturers_large.jpg?v=1484844377\" alt=\"cv4004 12ax7 ecc83\" width=\"316\" height=\"223\"\u003e\u003c\/span\u003e\u003cspan style=\"font-size: 12pt; font-family: 'arial black', 'avant garde';\"\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'arial black', 'avant garde';\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/MULLARD_ECC_53_480x480.jpg?v=1553184120\" alt=\"\" width=\"318\" height=\"426\"\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'arial black', 'avant garde';\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/MULLARD_NOVAL_AUDIO_480x480.jpg?v=1553184134\" alt=\"\" width=\"317\" height=\"443\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'arial black', 'avant garde';\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/mullard_cv_4000_series_57_480x480.jpg?v=1573563099\" alt=\"\" width=\"317\" height=\"406\"\u003e\u003c\/span\u003e\u003c\/p\u003e","products":[{"product_id":"copy-of-12ax7-brimar-manufactured-june-1968-ecc83","title":"12AX7,  Brimar, Manufactured  June 1968,  ECC83","description":"\u003cp style=\"text-align: justify;\"\u003e12AX7,  Brimar, Manufactured  June 1968,  ECC83\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan\u003e\u003cstrong\u003e\u003cspan face=\"arial black, avant garde\" size=\"3\" style=\"font-family: 'arial black', 'avant garde'; font-size: medium;\"\u003eOn offer today we have a Brimar white print 12AX7 made at the Brimsdown plant and carrying a date code for December 1960. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003eFor Va = 250 V Vg = -2.0V against a nominal specification of anode current Ia = 1.2 mA and mutual conductance gm = 1.6 mA\/V, the following results were obtained:-\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003eA1 Ia = 1.4 mA gm = 2.1 mA\/V\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003eA2 Ia = 1.4 mA gm = 2.0 mA\/V\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003eAs you can appreciate this represents good matching of each triode section within the envelope and a device showing superb emission.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"BRIMAR","offers":[{"title":"Default Title","offer_id":40186906050696,"sku":"g38","price":55.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/IMG_2766_a7dca24f-f31b-4160-bad1-ab4b9b5f3097.jpg?v=1649058702"},{"product_id":"12ax7-brimar-15mm-electrode-cage-manufactured-september-1967-ecc83","title":"12AX7,  Brimar, 15mm electrode cage, Manufactured  September 1967,  ECC83","description":"\u003cp style=\"text-align: justify;\"\u003e12AX7,  Brimar, 15mm electrode cage, Manufactured  September 1967,  ECC83\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan\u003e\u003cstrong\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: medium;\" size=\"3\" face=\"arial black, avant garde\"\u003eOn offer today we have a Brimar white print 12AX7 made at the Brimsdown plant and carrying a date code for September 1967. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003eThe device shows good matching of each triode section within the envelope and superb emission.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"BRIMAR","offers":[{"title":"Default Title","offer_id":41092417912968,"sku":"h103","price":55.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/DSCN1881.jpg?v=1679251775"},{"product_id":"12ax7-brimar-manufactured-june-1968-ecc83","title":"12AX7,  Brimar, Manufactured  June 1968,  ECC83","description":"\u003cp style=\"text-align: justify;\"\u003e12AX7,  Brimar, Manufactured  June 1968,  ECC83\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan\u003e\u003cstrong\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: medium;\" size=\"3\" face=\"arial black, avant garde\"\u003eOn offer today we have a Brimar white print 12AX7 made at the Brimsdown plant and carrying a date code for June 1968\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003eThe device shows good matching of each triode section within the envelope and  showing superb emission.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"BRIMAR","offers":[{"title":"Default Title","offer_id":41097298837640,"sku":"h101","price":55.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/DSCN1895.jpg?v=1679667669"},{"product_id":"copy-of-ecc83-mullard-rj-8h3-mullard-heerlen-manufactured-august-1959","title":"ECC83, MULLARD,  I65 , MULLARD,  HEERLEN MANUFACTURED, OCTOBER 1964","description":"\u003cp style=\"text-align: justify;\"\u003eECC83, MULLARD,  I65 , MULLARD,  HEERLEN MANUFACTURED, OCTOBER 1964\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan\u003e\u003cstrong\u003e\u003cspan face=\"arial black, avant garde\" size=\"3\" style=\"font-family: 'arial black', 'avant garde'; font-size: medium;\"\u003eOn offer today we have a Mullard white print ECC83 made at the Holland Heerlen plant and carrying a date code for October 1964.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003eFor Va = 250 V Vg = -2.0V against a nominal specification of anode current Ia = 1.2 mA and mutual conductance gm = 1.6 mA\/V, the following results were obtained:-\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003eA1 Ia = 1.4 mA gm = 1.7 mA\/V\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003eA2 Ia = 1.4 mA gm = 1.8 mA\/V\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003eAs you can appreciate this represents good matching of each triode section within the envelope and a device showing superb emission.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"MULLARD","offers":[{"title":"Default Title","offer_id":41313563967624,"sku":"H302","price":57.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/IMG_1729_1bc19138-3b9b-4931-82b3-c40c2ad080bb.jpg?v=1696339405"},{"product_id":"ecc83-brimar-manufactured-november-1968-1573-code-12ax7","title":"ECC83,  Brimar, Manufactured  November 1968, 1573 code,   12AX7","description":"\u003cp style=\"text-align: justify;\"\u003e ECC83,  Brimar, Manufactured  November 1968, 1573 code,   12AX7\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003eThe device shows good matching of each triode section within the envelope and  showing superb emission.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"BRIMAR","offers":[{"title":"Default Title","offer_id":41488954392712,"sku":"h26","price":55.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/IMG_2249.jpg?v=1700475028"},{"product_id":"f-cv4004-mullard-pinnacle-badged-box-anode-ecc83-r6e3-mitcham-manufactured-may-19666","title":"CV4004, MULLARD, PINNACLE BADGED, BOX ANODE, ECC83,  R6E3, MITCHAM MANUFACTURED, MAY 1966","description":"\u003cp style=\"text-align: justify;\"\u003eCV4004, MULLARD, PINNACLE BADGED, BOX ANODE, ECC83,  R6E3, MITCHAM MANUFACTURED, MAY 1966\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003eAs you can appreciate this represents good matching of each triode section within the envelope and a device showing superb emission.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"MULLARD","offers":[{"title":"Default Title","offer_id":41510550044808,"sku":"H300","price":90.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/IMG_0325_b9c93a3b-9f1c-487a-a4a4-a1df089a3516.jpg?v=1700999585"},{"product_id":"copy-of-cv4004-military-spec-ecc83-mullard-box-anode-mitcham-august-1958-manufacture","title":"CV4004, MILITARY SPEC, ECC83, MULLARD, BOX ANODE, MITCHAM JULY 1960 , MANUFACTURE","description":"\u003cp style=\"text-align: justify;\"\u003eCV4004, MILITARY SPEC, ECC83, MULLARD, BOX ANODE, MITCHAM JULY 1960 , MANUFACTURE\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan\u003e\u003cstrong\u003e\u003cspan face=\"arial black, avant garde\" size=\"3\" style=\"font-family: 'arial black', 'avant garde'; font-size: medium;\"\u003eOn offer today we have a BOX ANODE MULLARD which has lost its white print - no problem as this shows its \"box anode\" structure beautifully. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e \u003c\/p\u003e","brand":"MULLARD","offers":[{"title":"Default Title","offer_id":41782572220552,"sku":"h303","price":70.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/DSCN2121.jpg?v=1707843328"},{"product_id":"12ax7-stc-brimar-manufactured-november-1969-ecc83","title":"12AX7, STC Brimar, Manufactured  November 1969,  ECC83","description":"\u003ch2 style=\"text-align: justify;\"\u003e12AX7, STC Brimar, Manufactured  November 1969,  ECC83\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan\u003e\u003cstrong\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: medium;\" size=\"3\" face=\"arial black, avant garde\"\u003eOn offer today we have a Brimar white print 12AX7 made at the Brimsdown plant and carrying a date code for November 1969\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003eThe device shows good matching of each triode section within the envelope and  showing superb emission.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"BRIMAR","offers":[{"title":"Default Title","offer_id":42418482315400,"sku":"h765","price":50.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/IMG_2773.jpg?v=1716456511"},{"product_id":"ecc83-brimar-long-plate-manufactured-1961-12ax7","title":"ECC83  Brimar,  Manufactured  1961,  12AX7","description":"\u003cp style=\"text-align: justify;\"\u003eECC83  Brimar,  Manufactured  1961,  12AX7\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan\u003e\u003cstrong\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: medium;\" size=\"3\" face=\"arial black, avant garde\"\u003eOn offer today we have a Brimar white print 12AX7 made at the Brimsdown plant. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003eThe device shows good matching of each triode section within the envelope and  showing superb emission.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"BRIMAR","offers":[{"title":"Default Title","offer_id":42835362283656,"sku":"f4","price":55.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/IMG_2312.jpg?v=1723799246"},{"product_id":"ecc83-brimar-long-plate-manufactured-february-1961-12ax7-copy","title":"5751, GE, TRIPLE MICA, HALO GETTER, GREY PLATE,  MARCH 1963 OWENSBORO PRODUCTION","description":"\u003cp style=\"text-align: justify;\"\u003e5751, GE, TRIPLE MICA, HALO GETTER, GREY PLATE,  MARCH 1963 OWENSBORO PRODUCTION\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e \u003c\/p\u003e","brand":"GE","offers":[{"title":"Default Title","offer_id":42987420549256,"sku":"D292","price":49.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/IMG_3247.jpg?v=1728566994"},{"product_id":"ecc83-brimar-manufactured-1961-12ax7-copy","title":"ECC83  Brimar,  12AX7","description":"\u003cp style=\"text-align: justify;\"\u003eECC83  Brimar,  12AX7\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan\u003e\u003cstrong\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: medium;\" size=\"3\" face=\"arial black, avant garde\"\u003eOn offer today we have a Brimar white print 12AX7 made at the Brimsdown plant. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003eThe device shows good matching of each triode section within the envelope and  showing superb emission.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"BRIMAR","offers":[{"title":"Default Title","offer_id":43069498196104,"sku":"H670","price":55.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/IMG_2910.jpg?v=1731149010"},{"product_id":"ecc83-mazda-blue-print-12ax7","title":"ECC83  Mazda, Blue Print, 12AX7","description":"\u003cp style=\"text-align: justify;\"\u003eECC83  Mazda, Blue Print, 12AX7\u003c\/p\u003e","brand":"MAZDA","offers":[{"title":"Default Title","offer_id":43771828338824,"sku":"g29","price":24.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/IMG_3865.jpg?v=1749997260"},{"product_id":"ecc83-brimar-manufactured-june-1964-1573-code-12ax7","title":"ECC83,  Brimar, Manufactured  June 1964, 1573 code,   12AX7","description":"\u003cp style=\"text-align: justify;\"\u003eECC83,  Brimar, Manufactured  June 1964, 1573 code,   12AX7\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003eThe device shows good matching of each triode section within the envelope and  showing superb emission.\u003c\/span\u003e\u003c\/p\u003e","brand":"BRIMAR","offers":[{"title":"Default Title","offer_id":44258789654664,"sku":"h672","price":50.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/IMG_4860.jpg?v=1757403860"},{"product_id":"ecc83-brimar-12ax7","title":"ECC83  BRIMAR,  12AX7, JANUARY 1967 PRODUCTION","description":"\u003cp style=\"text-align: justify;\"\u003eECC83  BRIMAR,  12AX7, JANUARY 1967 PRODUCTION\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan\u003e\u003cstrong\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: medium;\" size=\"3\" face=\"arial black, avant garde\"\u003eOn offer today we have a Brimar white print 12AX7 made at the Brimsdown plant. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003eThe device shows good matching of each triode section within the envelope and  showing superb emission.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"BRIMAR","offers":[{"title":"Default Title","offer_id":44939893670024,"sku":"H672","price":42.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/IMG_7662.jpg?v=1774691322"},{"product_id":"cv492-military-spec-12ax7-mullard-ecc83-b1g5-blackburn-manufactured-july-1961","title":"CV492, MILITARY SPEC. 12AX7, MULLARD,  ECC83,  B1G5, BLACKBURN MANUFACTURED, JULY 1961","description":"\u003cp style=\"text-align: justify;\"\u003eCV492, MILITARY SPEC. 12AX7, MULLARD,  ECC83,  B1G5, BLACKBURN MANUFACTURED, JULY 1961\u003c\/p\u003e","brand":"MULLARD","offers":[{"title":"Default Title","offer_id":46113448329352,"sku":"A197","price":55.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/IMG_8068.jpg?v=1781510770"},{"product_id":"cv492-military-spec-12ax7-mullard-ecc83-17mm-plate-mc1-b5h-blackburn-manufactured-august-1955","title":"CV492, MILITARY SPEC. 12AX7, MULLARD,  ECC83, 17mm PLATE, mC1 B5H, BLACKBURN MANUFACTURED AUGUST  1955","description":"\u003cp style=\"text-align: justify;\"\u003eCV492, MILITARY SPEC. 12AX7, MULLARD,  ECC83, 17mm PLATE, mC1 B5H, BLACKBURN MANUFACTURED AUGUST  1955\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003eSLIGHT EXTERNAL ENVELOPE FILM, NOT CLEANED SO MARKINGS REMAIN INTACT.\u003c\/p\u003e","brand":"MULLARD","offers":[{"title":"Default Title","offer_id":46113571504264,"sku":"A380","price":95.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/IMG_8076.jpg?v=1781524605"},{"product_id":"cv492-military-spec-12ax7-mullard-ecc83-17mm-plate-mc1-b5h-blackburn-manufactured-august-1955-copy","title":"CV492, MILITARY SPEC. 12AX7, MULLARD,  ECC83, 17mm PLATE, mC1 B5H, BLACKBURN MANUFACTURED AUGUST  1955 (Copy)","description":"\u003cp style=\"text-align: justify;\"\u003eCV492, MILITARY SPEC. 12AX7, MULLARD,  ECC83, 17mm PLATE, mC1 B5H, BLACKBURN MANUFACTURED AUGUST  1955\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003ePerfect print\u003c\/p\u003e","brand":"MULLARD","offers":[{"title":"Default Title","offer_id":46113582776456,"sku":"a235","price":110.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/IMG_8087.jpg?v=1781525438"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/collections\/0002587_ecc83-12ax7-cv4004-cv492-b339-m8137-6057-vx7059-twin-triode-valve-various-manufacturers.jpg?v=1756808321","url":"https:\/\/mullard.org\/collections\/ecc83-12ax7-cv4004-cv492-b339-m8137-6057-vx7059-twin-triode-valve-various-manufacturers.oembed?page=2","provider":"MULLARD MAGIC","version":"1.0","type":"link"}