{"title":"ALL AUDIO VALVES","description":"\u003cp\u003e8032 valve types of all descriptions were ever made, in this section we list those we have with are AUDIO types\u003c\/p\u003e","products":[{"product_id":"osram-ml6-ceramic-based-triode-1940s-for-raf-t1154-px4-px25-valve-amplifiers","title":"OSRAM ML6 CERAMIC BASED TRIODE 1940S FOR RAF T1154 \u0026 PX4 PX25 VALVE AMPLIFIERS","description":"\u003cdiv class=\"variant-description\"\u003eA beautiful example of these scarce triodes showing textbook emission.\u003c\/div\u003e\n\u003cdiv class=\"sku\"\u003e\n\u003cspan class=\"label\"\u003eStock Code: \u003c\/span\u003e\u003cspan class=\"value\" itemprop=\"sku\" id=\"sku-1520\"\u003eK35\u003c\/span\u003e\n\u003c\/div\u003e","brand":"MULLARD MAGIC","offers":[{"title":"Default Title","offer_id":14361281027,"sku":"K35","price":36.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/0005132_osram-ml6-ceramic-based-triode-1940s_500.jpeg?v=1452509096"},{"product_id":"copy-of-osram-ml6-ceramic-based-triode-1940s-for-raf-t1154-px4-px25-valve-amplifiers-1","title":"OSRAM ML6 CERAMIC BASED TRIODE 1940S FOR RAF T1154 \u0026 PX4 PX25 VALVE AMPLIFIERS","description":"\u003cdiv class=\"variant-description\"\u003eA beautiful example of these scarce triodes showing textbook emission.\u003c\/div\u003e\n\u003cdiv class=\"sku\"\u003e\u003cspan class=\"label\"\u003eStock Code: y74\u003c\/span\u003e\u003c\/div\u003e","brand":"MULLARD MAGIC","offers":[{"title":"Default Title","offer_id":14361341315,"sku":"y74","price":36.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/0005131_osram-ml6-ceramic-based-triode-1940s_500.jpeg?v=1464366306"},{"product_id":"copy-of-osram-ml6-ceramic-based-triode-1940s-for-raf-t1154-px4-px25-valve-amplifiers-2","title":"OSRAM ML6 CERAMIC BASED TRIODE 1940S FOR RAF T1154 \u0026 PX4 PX25 VALVE AMPLIFIERS","description":"\u003cdiv class=\"variant-description\"\u003eA beautiful example of these scarce triodes showing textbook emission.\u003c\/div\u003e\n\u003cdiv class=\"sku\"\u003e\u003cspan class=\"label\"\u003eStock Code: y72\u003c\/span\u003e\u003c\/div\u003e","brand":"MULLARD MAGIC","offers":[{"title":"Default Title","offer_id":14361371843,"sku":"y72","price":36.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/0005130_osram-ml6-ceramic-based-triode-1940s_500.jpeg?v=1452509438"},{"product_id":"marconi-pt15-vt104-pentode-output-valve-as-used-in-t1154","title":"PT15 VT104 MARCONI PENTODE OUTPUT VALVE AS USED IN T1154","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eThe PT15 output pentode is a development of the Marconi Osram Valve company type PT5.  The principal modification was to raise the  filament voltage from 4 to 6.3V and then fit a ceramic base to 'tropicalise' the device such that absorbtion of water by a lesser base material type would not cause parasitic oscillation and arcing problems in usage.  When you consider this usage was primarily in airborne bombers like the Lancaster and Mosquito you can appreciate why this costly measure was undertaken.  The final modification of course was to improve the support structure and rigidity of the electrode cage by beefing up componentry yet wherever possible reducing mass.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eAlly this build quality to simplicity and you can appreciate why these valves were so successful in push-pull configuration as the PA stage for the Lancaster bomber transmitter, the T1154 and why today these are prized by audiophiles as their appearance as well as the sound they produce is superb. \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eThe PT 15 or VT104 in Air Ministry parlance was so essential to the War Effort that production was given over to a shadow factory in an area of Oldham called Shaw near Manchester and virtually every PT15 ever manufactured was made there. Indeed, Cape Mills still stands today and post war, became a Ferranti faciltiy before being wound down and today being given over to small business units.   This mill is only some 25 miles from Mullard Magic HQ so it seems the devices we have on offer may not have travelled far in their 70 year lifetime!!\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eThis example is in fine condition showing full emission.\u003c\/b\u003e\u003c\/p\u003e","brand":"MULLARD MAGIC","offers":[{"title":"Default Title","offer_id":14880951107,"sku":"c8","price":45.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/IMG_5368-001.JPG?v=1453200749"},{"product_id":"5z4g","title":"5Z4G CV1863 AIR MINISTRY WW2 BRIMAR 52KU  CV2748 R52","description":"\u003ch5\u003eThe CV1863 is the Air Ministry \/Army variant of the 5Z4G.  Designed for professional equipment, such as radar and communications equipment with circuits in which valve cathodes carried large signals and had to 'float' at voltages well below that of the chassis.   \u003c\/h5\u003e\n\u003ch5\u003eCapable of a 40 Watts total power, this rectifier was made by several manufacturers and as you can see from the title listing came under the guise of many different reference numbers.   \u003c\/h5\u003e\n\u003ch5\u003eThis variant shows full emission and is a Brimar Air Ministry variant as evinced by the glass-base interface sleeve.  A very nice device indeed.\u003c\/h5\u003e","brand":"MULLARD MAGIC","offers":[{"title":"Default Title","offer_id":15601716035,"sku":"","price":30.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/IMG_5489-001.JPG?v=1454094070"},{"product_id":"a-2","title":"B4 CERAMIC BASED ST ENVELOPED AIR MINISTRY AUDIO TRIODE CV1045 VT45 10E\/10557 FOR RAF SWORDFISH RADIO T1115","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWell on offer today we have something quite special, I have a limited stock of Air Ministry Old Stock audio triodes.  These fetching exquisite devices come in two forms, globe and ST shaped envelope,  with ceramic valve bases and they are really quite something.\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eThe photos show detailed scans of the SIVCRED data sheets but for me to paraphrase, the valve parameters are as follows: -\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eVf = 2V @0.4A\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eVamax = 300V\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eFor Vg = -10V for Va = 200V, Ia = 11mA; gm = 2.5mA\/V \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eAs you can see, these ratings make these eminently suitable as am inter-stage driver valve or as preamplifier gain stage valves.  Very rarely offered we only have a limited stock of these so please, secure a stash whilst you can. \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"OSRAM VALVE COMPANY","offers":[{"title":"Default Title","offer_id":16531091971,"sku":"A110","price":28.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/0002276_b4-ceramic-based-air-ministry-audio-triode-cv1045-vt45-10e10557-for-raf-swordfish-radio-t1115.jpeg?v=1756722110"},{"product_id":"copy-of-mullard-white-print-ecc31-wartime-manufacture","title":"ECC31 CLEAR TOP SCREEDED BOTTOM MULLARD WHITE PRINT WARTIME MANUFACTURE","description":"\u003cp\u003eCLEAR TOP SCREEDED BOTTOM MULLARD WHITE PRINT ECC31 WARTIME MANUFACTURE\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOn offer today we have a superb ECC31, wartime manufacture showing superb white print and full emission and excellent matching from each section of this medium output power triode - superb in every way. \u003c\/span\u003e\u003c\/p\u003e","brand":"MULLARD MAGIC","offers":[{"title":"Default Title","offer_id":32144745422,"sku":"EX47","price":67.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/DSCF8837.JPG?v=1756456142"},{"product_id":"copy-of-6064-cv4014-nib","title":"6080, BRIMAR, 6AS7G, 6AS7, CV2984, 6080, 5998, 421A, NIB","description":"\u003cp style=\"text-align: justify;\"\u003e6080, BRIMAR, 6AS7G, 6AS7, CV2984, 6080, 5998, 421A, NIB\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"BRIMAR","offers":[{"title":"Default Title","offer_id":34666089614,"sku":"E","price":33.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/6080.jpeg?v=1561396807"},{"product_id":"5u4gb-ge-nib","title":"5U4GB, GE, NIB","description":"\u003cp\u003e5U4GB, GE, NIB\u003c\/p\u003e","brand":"GENERAL ELECTRIC","offers":[{"title":"Default Title","offer_id":34809210702,"sku":"CU","price":22.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/5U4GB.jpeg?v=1561561270"},{"product_id":"5y3gt-various-nib","title":"5Y3GT, SYLVANIA NIB, 5Y3GT\/G, CV1856, U50, VT-197A,","description":"\u003cp\u003e5Y3GT, SYLVANIA NIB, 5Y3GT\/G, CV1856, U50, VT-197A,\u003c\/p\u003e","brand":"SYLVANIA","offers":[{"title":"Default Title","offer_id":34809252366,"sku":"E","price":17.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/5Y4G.jpeg?v=1561567704"},{"product_id":"5z4-nib","title":"5Z4, MILITARY, 10E\/17, NOS, BOXED","description":"\u003cp\u003e5Z4, MILITARY, 10E\/17, NOS, BOXED\u003c\/p\u003e","brand":"ws army","offers":[{"title":"Default Title","offer_id":34809310478,"sku":"CU N2 FA","price":14.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/5Z4.jpeg?v=1561577172"},{"product_id":"ecc40-various-new-boxed","title":"ECC40, VARIOUS, NEW BOXED, CV3884","description":"ECC40, VARIOUS, NEW BOXED, CV3884","brand":"pinnacle","offers":[{"title":"Default Title","offer_id":35000738446,"sku":"N2 CU","price":25.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/ECC40.jpeg?v=1562097318"},{"product_id":"ecc81-zaerix-nib","title":"ECC81, ZAERIX, NEW BOXED, CV4024","description":"ECC81, ZAERIX, NEW BOXED, CV4024","brand":"ZAERIX","offers":[{"title":"Default Title","offer_id":35021607630,"sku":"N2","price":10.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/ECC81.jpeg?v=1562097735"},{"product_id":"ecc82-zaerix-nib","title":"ECC82, ZAERIX, NEW, BOXED, CV4003","description":"ECC82, ZAERIX, NEW, BOXED, CV4003","brand":"ZAERIX","offers":[{"title":"Default Title","offer_id":35021627278,"sku":"N2 CU E HGGE","price":15.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/IMG_4845.jpg?v=1757076172"},{"product_id":"osram-black-base-kt61-from-nov-1953","title":"KT61, OSRAM, MATCHED PAIR, BROWN BASE,  FROM 1954-1955","description":"\u003cp\u003e\u003cstrong\u003eKT61, OSRAM, MATCHED PAIR, BROWN BASE,  FROM 1954-1955\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOn offer today we have these beautiful Osram\/GEC devices.  They test showing good emission as you can see from the attached test data label courtesy of our AVO VCM163.   The envelopes both  carry the white inked cartouche and the brown micanol bases are tight to the envelopes with clean uncorroded pins.  \u003c\/strong\u003e\u003c\/p\u003e","brand":"OSRAM VALVE COMPANY","offers":[{"title":"Default Title","offer_id":36096922958,"sku":"h98 h129","price":125.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/IMG_1152.jpg?v=1689413472"},{"product_id":"ez81-brimar-white-print-british-made","title":"EZ81, Mazda, White Print ,British Made","description":"\u003cp style=\"text-align: justify;\"\u003e\u003cspan\u003e EZ81, Mazda, White Print ,British Made\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cstrong\u003eOn offer today is an  EX EQUIPMENT BRIMAR EZ81 B9A rectifier valvs, showing good emission when tested using our AVO VCM163 valve tester. \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cscript src=\"safari-extension:\/\/com.ebay.safari.myebaymanager-QYHMMGCMJR\/92f3f097\/background\/helpers\/prefilterHelper.js\" type=\"text\/javascript\"\u003e\u003c\/script\u003e\u003c\/p\u003e","brand":"maxell","offers":[{"title":"Default Title","offer_id":36099905550,"sku":"x11","price":19.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/0005250_brimar-white-print-ez81-british-made.jpg?v=1487846052"},{"product_id":"6x5wgt-sylvania-brown-base","title":"6X5WGT SYLVANIA BROWN BASE 6X5","description":"\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e \u003cstrong\u003eOn offer today we have a Wartime Joint Army Navy 6X5WGT. This device is ex equipment and has markings in white ink. The valve shows 100% emission and has a fat brown micanol base tight to the envelope with bright uncorroded pins - a very nice valve indeed!.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cscript type=\"text\/javascript\" src=\"safari-extension:\/\/com.ebay.safari.myebaymanager-QYHMMGCMJR\/cf7ca614\/background\/helpers\/prefilterHelper.js\"\u003e\u003c\/script\u003e","brand":"MULLARD MAGIC","offers":[{"title":"Default Title","offer_id":36119533006,"sku":"Y46","price":17.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/IMG_1546-001.JPG?v=1487863956"},{"product_id":"ml4-marconi-osram-st-shaped-air-ministry-10e-17-tested","title":"ML4, MARCONI OSRAM, AIR MINISTRY, 10E\/17,","description":"\u003cstrong\u003eML4, MARCONI OSRAM, AIR MINISTRY, 10E\/17,  Beautiful screeded broad ST19 bulb, black base, today we have a Marconi Osram ML4 having white inked markings and a circular MWT blue \u0026amp; white round decal to the obverse.   The device has been tested using our VCM163 valve tester and shows good emission.\u003c\/strong\u003e","brand":"MARCONI","offers":[{"title":"Default Title","offer_id":38100880270,"sku":"Y36","price":30.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/DSCF2725.JPG?v=1490891857"},{"product_id":"copy-of-ml4-marconi-osram-st-shaped-air-ministry-10e-17-tested","title":"ML4 MARCONI OSRAM ST SHAPED TESTED","description":"\u003cstrong\u003eBeautiful screeded broad ST19 bulb, black base, today we have a Marconi Osram ML4 having white inked markings and a circular MWT blue \u0026amp; white round decal to the obverse.   The device has been tested using our VCM163 valve tester and shows good emission.\u003c\/strong\u003e","brand":"MARCONI","offers":[{"title":"Default Title","offer_id":38100891470,"sku":"G5","price":25.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/DSCF2734.JPG?v=1490891879"},{"product_id":"copy-of-pt15-vt104-marconi-pentode-output-valve-as-used-in-t1154","title":"PT15 VT104 MARCONI PENTODE OUTPUT VALVE AS USED IN T1154","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eThe PT15 output pentode is a development of the Marconi Osram Valve company type PT5.  The principal modification was to raise the  filament voltage from 4 to 6.3V and then fit a ceramic base to 'tropicalise' the device such that absorbtion of water by a lesser base material type would not cause parasitic oscillation and arcing problems in usage.  When you consider this usage was primarily in airborne bombers like the Lancaster and Mosquito you can appreciate why this costly measure was undertaken.  The final modification of course was to improve the support structure and rigidity of the electrode cage by beefing up componentry yet wherever possible reducing mass.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eAlly this build quality to simplicity and you can appreciate why these valves were so successful in push-pull configuration as the PA stage for the Lancaster bomber transmitter, the T1154 and why today these are prized by audiophiles as their appearance as well as the sound they produce is superb. \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eThe PT 15 or VT104 in Air Ministry parlance was so essential to the War Effort that production was given over to a shadow factory in an area of Oldham called Shaw near Manchester and virtually every PT15 ever manufactured was made there. Indeed, Cape Mills still stands today and post war, became a Ferranti faciltiy before being wound down and today being given over to small business units.   This mill is only some 25 miles from Mullard Magic HQ so it seems the devices we have on offer may not have travelled far in their 70 year lifetime!!\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eThis example is in fine condition showing full emission.\u003c\/b\u003e\u003c\/p\u003e","brand":"MULLARD MAGIC","offers":[{"title":"Default Title","offer_id":38169807374,"sku":"K36","price":45.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/DSCF2779.JPG?v=1756486669"},{"product_id":"807-cossor-raf-ceramic-based-vt60a-10e-507","title":"807, WESTINGHOUSE, NEW BOXED,  VT60A, 10E\/507,","description":"807, WESTINGHOUSE, NEW BOXED,  VT60A, 10E\/507,","brand":"WESTINGHOUSE","offers":[{"title":"Default Title","offer_id":38170937102,"sku":"N3","price":12.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/807.jpeg?v=1561396365"},{"product_id":"6x4-tung-sol-usa-1960s-manufacture","title":"6X4 TUNG-SOL USA  1960s MANUFACTURE","description":"\u003cstrong\u003eOn offer is a Tung-Sol USA 6X4 rectifier .  It is unboxed and tests as 100% emission for each didoe section within the envelope using our AVO VCM163.\u003c\/strong\u003e","brand":"TUNG-SOL","offers":[{"title":"Default Title","offer_id":38198774670,"sku":"v12","price":18.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/DSCF2786.JPG?v=1491036704"},{"product_id":"vu39-air-ministry-specifcation-stc-footscray-pre-1951-10e-9600-mu14","title":"VU39 AIR MINISTRY SPECIFCATION STC FOOTSCRAY PRE 1951  10E\/9600 MU14","description":"\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cstrong\u003eThis rectifier type had the distinction in 1933 of being Marconi – Osram’s first ever indirectly heated rectifier valve. Many other manufacturers developed and marketed an equivalent with Mazda introducing the equivalent UU4 and UU5 in 1935 and 1936 respectively.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cstrong\u003eShowing superb performance it has a place alongside that other famed B4 based produce the PX4 \u0026amp; PX25.\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e \u003c\/p\u003e","brand":"STANDARD TELEPHONES \u0026 CABLES ( STC)","offers":[{"title":"Default Title","offer_id":38203373006,"sku":"Y22","price":30.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/DSCF2634.JPG?v=1491046526"},{"product_id":"copy-of-vu39-air-ministry-specifcation-stc-footscray-pre-1951-10e-9600-mu14","title":"MU14  GEC\/MARCONI  RECTIFIER VALVE  ARMY ZA15008","description":"\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cstrong\u003eThis rectifier type had the distinction in 1933 of being Marconi – Osram’s first ever indirectly heated rectifier valve. Many other manufacturers developed and marketed an equivalent with Mazda introducing the equivalent UU4 and UU5 in 1935 and 1936 respectively.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cstrong\u003eShowing superb performance it has a place alongside that other famed B4 based produce the PX4 \u0026amp; PX25.\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e \u003c\/p\u003e","brand":"STANDARD TELEPHONES \u0026 CABLES ( STC)","offers":[{"title":"Default Title","offer_id":38213087886,"sku":"Y25","price":28.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/DSCF2636.JPG?v=1491068182"},{"product_id":"copy-of-vu39-air-ministry-specifcation-stc-footscray-pre-1951-10e-9600-mu14-1","title":"VU39 AIR MINISTRY SPECIFCATION STC FOOTSCRAY PRE 1951  10E\/9600 MU14","description":"\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cstrong\u003eThis rectifier type had the distinction in 1933 of being Marconi – Osram’s first ever indirectly heated rectifier valve. Many other manufacturers developed and marketed an equivalent with Mazda introducing the equivalent UU4 and UU5 in 1935 and 1936 respectively.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cstrong\u003eShowing superb performance it has a place alongside that other famed B4 based produce the PX4 \u0026amp; PX25.\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e \u003c\/p\u003e","brand":"STANDARD TELEPHONES \u0026 CABLES ( STC)","offers":[{"title":"Default Title","offer_id":38213160974,"sku":"B8","price":30.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/DSCF2637.JPG?v=1491068314"},{"product_id":"u14-vu64-mov-springvale-manufacture-tested","title":"APV4, TUNGSRAM, ,1951 MANUFACTURE, 1867, 1W4-350, CV1039, MU14, R3, R42, UU5","description":"\u003ch5\u003e\u003c\/h5\u003e\n\u003cp\u003eAPV4, TUNGSRAM, ,1951 MANUFACTURE, 1867, 1W4-350, CV1039, MU14, R3, R42, UU5\u003c\/p\u003e","brand":"TUNGSRAM","offers":[{"title":"Default Title","offer_id":38213430222,"sku":"C811","price":28.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/IMG_3050.jpg?v=1614074401"},{"product_id":"copy-of-5z4g-cv1863-air-ministry-ww2-brimar-52ku-cv2748-r52-1","title":"5V4G BRIMAR BLACK BASE","description":"\u003ch5\u003e\u003cstrong style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003eOn offer we have a Brimar  5V4G rectifier valve.  The classic ST envelope is tight to the black micanol base which shows smudged white print.  The device tests as 100% emissive for each diode section using our AVO VCM 163.  \u003c\/strong\u003e\u003c\/strong\u003e\u003c\/h5\u003e","brand":"BRIMAR","offers":[{"title":"Default Title","offer_id":38247690190,"sku":"A4","price":35.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/DSCF2791.JPG?v=1491150518"},{"product_id":"copy-of-5v4g-brimar-black-base-1","title":"5V4G BRIMAR BLACK BASE SILVER BASE PRINT","description":"\u003ch5\u003e\u003cstrong style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003eOn offer we have a Brimar  5V4G rectifier valve.  The classic ST envelope is tight to the black micanol base which shows smudged white print.  The device tests as 100% emissive for each diode section using our AVO VCM 163.  \u003c\/strong\u003e\u003c\/strong\u003e\u003c\/h5\u003e","brand":"BRIMAR","offers":[{"title":"Default Title","offer_id":38247865230,"sku":"a10","price":38.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/DSCF2795.JPG?v=1491150790"},{"product_id":"copy-of-5v4g-brimar-black-base-silver-base-print","title":"5V4G RCA JAN BLACK BASE SILVER BASE PRINT","description":"\u003ch5\u003e\u003cstrong style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003e\u003cstrong\u003eOn offer we have an RCA  JAN mil spec 5V4G rectifier valve.  The classic ST envelope is tight to the black micanol base which shows silver base print print.  The device tests as 100% emissive for each diode section using our AVO VCM 163.  \u003c\/strong\u003e\u003c\/strong\u003e\u003c\/h5\u003e","brand":"rca","offers":[{"title":"Default Title","offer_id":38248009422,"sku":"janrca","price":30.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/DSCF2796.JPG?v=1491151017"},{"product_id":"copy-of-5v4g-rca-jan-black-base-silver-base-print","title":"GZ32 PINNACLE  (FIVRE)","description":"\u003ch5\u003e\u003cstrong\u003e\u003cstrong\u003e\u003cfont face=\"arial black, avant garde\" size=\"3\"\u003eOn offer we have an Pinnacle GZ32 rectifier valve.  The classic ST envelope is tight to the black micanol base.  The envelope shows smudged white print.  The device tests as 100% emissive for each diode section using our AVO VCM 163.  \u003c\/font\u003e\u003c\/strong\u003e\u003c\/strong\u003e\u003c\/h5\u003e","brand":"pinnacle","offers":[{"title":"Default Title","offer_id":38248128782,"sku":"g4","price":28.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/DSCF2798.JPG?v=1491151307"},{"product_id":"5r4gyb-rca-harrison-t9-envelope","title":"5R4GYB RCA HARRISON T9 ENVELOPE","description":"\u003cstrong\u003eOn offer today we have one of the short form T9 enveloped RCA 5R4GY - these often found use in Collins 516 power\/control unit courtesy of their short form envelope but they loose nothing in performance over their ST19 colleagues.  On test this device shows good emission and good matching between each diode section - an excellent RCA device at a keen price - forget prejudice and fit this and reap the reward of a sag free HT with commensurate sonic performance.\u003c\/strong\u003e","brand":"RCA","offers":[{"title":"Default Title","offer_id":38286386574,"sku":"K9","price":16.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/DSCF2801.JPG?v=1491205527"},{"product_id":"6x5gt-brimar-brown-base","title":"6X5GT BRIMAR BROWN BASE 6X5","description":"\u003cstrong\u003e On offer today we have a Brimar 6X5GT rectifier.   This device is ex equipment  carrying  markings in white ink.    The valve shows 100% emission and has a fat brown low loss micanol base tight to the envelope with bright uncorroded pins - a very nice valve indeed!.\u003c\/strong\u003e","brand":"BRIMAR","offers":[{"title":"Default Title","offer_id":38286635150,"sku":"52","price":32.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/DSCF2803.JPG?v=1491205868"},{"product_id":"copy-of-5z4g-apw3792-brimar-matched-pair","title":"5V4G BRIMAR ORANGE BASE PRINT MATCHED PAIR","description":"\u003ch5\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003eOn offer today, we have this scarce matched pair of devices, scarce as they were made at the Brimar sometime during WW2.\u003c\/span\u003e\u003c\/h5\u003e","brand":"BRIMAR","offers":[{"title":"Default Title","offer_id":38286723918,"sku":"EX32\/B23","price":80.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/DSCF2804.JPG?v=1491206044"},{"product_id":"sarkes-tarzian-s5298-octal-based-silicon-rectifier-replacement-for-valve-rectifiers","title":"SARKES TARZIAN, S5298, OCTAL BASED SILICON RECTIFIER REPLACEMENT, GZ34, GZ32, 5U4G, 5Y4GY, RECTIFIERS","description":"SARKES TARZIAN, S5298, OCTAL BASED SILICON RECTIFIER REPLACEMENT, GZ34, GZ32, 5U4G, 5Y4GY, RECTIFIERS","brand":"SARKES TARZIAN","offers":[{"title":"Default Title","offer_id":44379680590,"sku":"BX20","price":15.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/DSCF3594.JPG?v=1501660187"},{"product_id":"copy-of-cv187-air-ministry-u19-heavy-duty-hw-rectifier-1968-production-cv1508-u23-vu508-v1913-10e-520-ww2-manufacture-by-osram","title":"CV187, AIR MINISTRY, U19, HEAVY DUTY HW RECTIFIER,  SEPTEMBER 1959, OSRAM HAMMERSMITH, CV1508, U23, VU508, V1913,  10E\/520,","description":"\u003ch4\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/h4\u003e\nCV187, AIR MINISTRY, U19, HEAVY DUTY HW RECTIFIER,  SEPTEMBER 1959, OSRAM HAMMERSMITH, CV1508, U23, VU508, V1913,  10E\/520,\n\u003ch4\u003e\u003cstrong\u003eThis example tests strongly and has superb  white print and carries the Osram date code for September 1959\u003c\/strong\u003e\u003c\/h4\u003e","brand":"OSRAM VALVE COMPANY","offers":[{"title":"Default Title","offer_id":1260347523086,"sku":"a61","price":30.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/IMG_1597.JPG?v=1518302701"},{"product_id":"cv187-air-ministry-u19-heavy-duty-hw-rectifier-1960-production-cv1508-u23-vu508-v1913-10e-520-ww2-manufacture-by-osram","title":"CV187, AIR MINISTRY, U19, HEAVY DUTY HW RECTIFIER,  MARCH 1960, OSRAM HAMMERSMITH, CV1508, U23, VU508, V1913,  10E\/520,","description":"\u003ch4\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eCV187, AIR MINISTRY, U19, HEAVY DUTY HW RECTIFIER,  MARCH 1960, OSRAM HAMMERSMITH, CV1508, U23, VU508, V1913,  10E\/520,\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eThis example tests strongly and has superb  white print and carries the Osram date code for March 1960\u003c\/strong\u003e\u003c\/h4\u003e","brand":"OSRAM VALVE COMPANY","offers":[{"title":"Default Title","offer_id":1260349685774,"sku":"a64","price":30.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/IMG_1598.JPG?v=1518302745"},{"product_id":"copy-of-mu14-gec-marconi-rectifier-valve-1","title":"IW4\/350, MULLARD  RECTIFIER VALVE","description":"\u003cp style=\"text-align: justify;\"\u003e\u003cspan\u003e\u003cstrong\u003e\u003cfont size=\"2\"\u003eThis rectifier types the Mullard derivative of the UU4 Many other manufacturers developed and marketed an equivalent with Mazda introducing the equivalent UU4 and UU5 in 1935 and 1936 respectively.\u003c\/font\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cstrong\u003eShowing superb performance it has a place alongside that other famed B4 based produce the PX4 \u0026amp; PX25.\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e \u003c\/p\u003e","brand":"MULLARD","offers":[{"title":"Default Title","offer_id":1262872592398,"sku":"c812","price":28.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/IMG_1622.JPG?v=1518379778"},{"product_id":"6j5w-matched-pair-westinghouse-canada-jan-coded","title":"6J5W MATCHED PAIR, WESTINGHOUSE CANADA JAN CODED","description":"6J5W MATCHED PAIR, WESTINGHOUSE CANADA JAN CODED","brand":"WESTINGHOUSE","offers":[{"title":"Default Title","offer_id":19345674600517,"sku":"D426 D427","price":40.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/DSC00052.jpg?v=1551262687"},{"product_id":"copy-of-5840w-cv3929-ef732-sylvania-for-telefunken-ak-47-mkii-ela-m260-microphones","title":"6021, 6021W PHILIPS ECC70 SUBMIN VALVE FOR RIAA \u0026 GUITAR PRE AMP, EFFECTS PEDAL","description":"\u003cdiv id=\"manudesc\"\u003e6021W, PHILIPS, ECC70, SUBMIN VALVE,RIAA,  GUITAR PRE AMP, EFFECTS PEDAL\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cspan\u003ePhilips 6021W is a low impedance medium mµ double triode and is a super sub miniature wire lead valve that was designed for the military.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eTHE 6021W is shock and vibration resistant low impedance medium mµ double triode as was designed for use in avionics equipment to give reliable performance at altitudes of 60,000 feet. It is because of this valves excellent qualities it has found its way into modern effects pedals and compressors. The 6021W is the special quality version of the ECC70. This is Philips USA made in the original military boxes\u003c\/span\u003e","brand":"PHILIPS MINIWATT","offers":[{"title":"Default Title","offer_id":29117170384965,"sku":"NU1","price":9.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/6021.jpeg?v=1560982723"},{"product_id":"copy-of-6021w-philips-ecc70-submin-valve-for-riaa-guitar-pre-amp-effects-pedal","title":"5687,  Raytheon, JAN,5687WA, 6900, 7044, 7119, CV2578, CV5138, E182CC","description":"\u003cp\u003e5687,  Raytheon, JAN,5687WA, 6900, 7044, 7119, CV2578, CV5138, E182CC\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe JAN-GE 5687WB tube has black anodes, copper grid posts, and a halo getter. These 5687 valves are noted for being an excellent driver tube for push-pull amps, and also in various OTL headphone amps.  \u003c\/span\u003e\u003c\/p\u003e","brand":"GENERAL ELECTRIC","offers":[{"title":"Default Title","offer_id":29118003183685,"sku":"a262","price":28.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/files\/IMG_8028.jpg?v=1781424572"},{"product_id":"copy-of-6x4-tung-sol-usa-1960s-manufacture","title":"6X4 BRIMAR WHITE PRINT  1960s MANUFACTURE","description":"\u003cstrong\u003eOn offer is a Brimar 6X4 rectifier .  It is unboxed and tests as 100% emission for each didoe section within the envelope using our AVO VCM163.\u003c\/strong\u003e","brand":"BRIMAR","offers":[{"title":"Default Title","offer_id":29171258753093,"sku":"D245","price":28.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/IMG_2624.jpg?v=1561043615"},{"product_id":"copy-of-807-rca-new-boxed-vt60a-10e-507","title":"807, MULLARD, NEW BOXED,  CV124, VT60A, 10E\/507,","description":"807, MULLARD, NEW BOXED,  CV124, VT60A, 10E\/507,","brand":"MULLARD","offers":[{"title":"Default Title","offer_id":29177145819205,"sku":"N3","price":20.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/807_b78e96b7-9234-4fd9-b898-52ab468cf40c.jpeg?v=1561396482"},{"product_id":"copy-of-ecc81-zaerix-new-boxed-cv4024","title":"ECC81, MAZDA, NEW BOXED, CV4024","description":"ECC81, MAZDA, NEW BOXED, CV4024","brand":"MAZDA","offers":[{"title":"Default Title","offer_id":29202799394885,"sku":"E","price":17.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/ECC81_0b572cb6-66f9-498e-a3a1-df79350be8d5.jpeg?v=1562097799"},{"product_id":"sylvania-5z3-black-base-5-rib-charcoial-anodes-jan-1959","title":"SYLVANIA 5Z3 BLACK BASE 5 RIB CHARCOAL ANODES JAN 1959","description":"\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003eWell, what a special device, essentially a U52 mounted on a UX4 base, this is a superb valve indeed.  Badged in green base print as a Sylvania this is scarce and desirable too.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003eShowing perfect emission on test,  will you give it a home?\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5 style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: 'arial black', 'avant garde'; font-size: 12pt;\"\u003eThe 5Z3 is a high power rectifier and was typically used in small radio transmitters, high power audio amplifiers, and modulators for amplitude modulation (AM) transmitters.  Much like the famed U52, the filaments are inverted 'v's of coated ribbon. The valve is mounted on a  UX4 base pins,  The type 5Z3 was first marketed and sold in 1936.\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp style=\"text-align: justify;\"\u003e \u003c\/p\u003e\n\u003cscript type=\"text\/javascript\" src=\"safari-extension:\/\/com.ebay.safari.myebaymanager-QYHMMGCMJR\/92f3f097\/background\/helpers\/prefilterHelper.js\"\u003e\u003c\/script\u003e","brand":"SYLVANIA","offers":[{"title":"Default Title","offer_id":29205152268357,"sku":"e1","price":40.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/IMG_2872.jpg?v=1562157911"},{"product_id":"copy-of-ez80-philips-miniwattwhite-label-matched-pair","title":"EZ80 COLOMOR, NEW BOXED, 6V4, CV1535","description":"EZ80 COLOMOR, NEW BOXED, 6V4, CV1535","brand":"COLOMOR","offers":[{"title":"Default Title","offer_id":29369828016197,"sku":"E","price":14.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/EZ80.jpeg?v=1562594435"},{"product_id":"copy-of-5u4gb-ge-short-form","title":"5U4GB, RCA, 1959 MANUFACTURE 5U4","description":"\u003cdiv class=\"variant-name\"\u003e\u003cstrong\u003e 5U4GB, RCA, 1959 MANUFACTURE\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"variant-name\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"variant-name\"\u003e\u003cstrong\u003eThis RCA short form 5U4G valve shows excellent bright getter and tests as EXCELLENT using my Avo VCM163 valve tester. Device test data: Ia = 120.0mA for both diode sections Device specification 120mA delivery for both diode sections. So you can see we have 100% emission from this venerable beauty.\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"sku\"\u003e\u003c\/div\u003e","brand":"RCA","offers":[{"title":"Default Title","offer_id":29373797400645,"sku":"x6","price":16.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/IMG_0163.jpg?v=1581546357"},{"product_id":"ml4-marconi-matched-pair-1955-manufacture","title":"ML4, MARCONI, MATCHED PAIR, 1955 MANUFACTURE","description":"ML4, MARCONI, MATCHED PAIR, 1955 MANUFACTURE","brand":"MARCONI","offers":[{"title":"Default Title","offer_id":29380705288261,"sku":"C890 892","price":65.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/IMG_3038.jpg?v=1563102682"},{"product_id":"copy-of-5y3gt-sylvania-nib-5y3gt-g-cv1856-u50-vt-197a-1","title":"5Y3WGT, SYLVANIA  5Y3GT\/G, CV1856, U50, VT-197A,","description":"\u003cp\u003e 5Y3WGT, SYLVANIA NIB, 5Y3GT\/G, CV1856, U50, VT-197A,\u003c\/p\u003e","brand":"SYLVANIA","offers":[{"title":"Default Title","offer_id":29380706533445,"sku":"C888","price":15.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/IMG_3060.jpg?v=1563104098"},{"product_id":"6x5gt-brimar-fat-black-base-white-print","title":"6X5GT, BRIMAR, FAT BLACK BASE, WHITE PRINT","description":"6X5GT, BRIMAR, FAT BLACK BASE, WHITE PRINT","brand":"BRIMAR","offers":[{"title":"Default Title","offer_id":29381027201093,"sku":"G714","price":26.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/IMG_3033_1.jpg?v=1563138283"},{"product_id":"mhl4-marconi-air-ministry-10e-599","title":"MHL4, MARCONI, AIR MINISTRY, 10E\/599","description":"MHL4, MARCONI, AIR MINISTRY, 10E\/599","brand":"MARCONI","offers":[{"title":"Default Title","offer_id":29381031493701,"sku":"C751","price":22.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/products\/IMG_3039_1.jpg?v=1756500631"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/5784\/collections\/MULLARD_VDB_COVER.jpg?v=1756712904","url":"https:\/\/mullard.org\/collections\/all-audio-valves.oembed?page=37","provider":"MULLARD MAGIC","version":"1.0","type":"link"}