It is intended for use with turntables EMT 927 and EMT 930 and tone-head TSD15. The EMT 139B mono MC phono tube equalizer amplifier was designed in 1962 as successor of the EMT 139A to fulfil the need of mono sound reproduction with the professional studio turntables EMT 927 and EMT 930. It was and is a professional state-of-the-art mono MC phono tube equalizer amplifier with top quality in- and output transformers to amplify low level signals of dynamic (MC) cartridges to studio balanced line level (+6dB). The EMT 139B was provided with de-emphasis characteristics for NAB/RIAA/DIN 33/45, DIN 78, BBC and FLAT, it was in production with EMT until 1967 after which it was succeeded by the EMT 155 solid state mono MC phono equalizer amplifier. The EMT 139B is equipped with tested vintage TELEFUNKEN EF804 - and TELEFUNKEN ECC82 tubes, is completely checked and adjusted, is in superb working conditionALL TUBES TELEFUNKEN 2 X TELEFUNKEN ECC 82 LONG SMOOTH PLATE 2 X TELEFUNKEN EF 804 SILVER PLATE GUARANTEE, IF YOU ARE NOT SATISFIED, MONEY BACK matching power supply in my other listing

POWER SUPPLY FOR 2 x EMT 139 MONO PHONO RIAA MADE EXACTLY TO THE EMT 927, 930 WIRING DIAGRAM AND BUILT FROM THE SAME PARTS - NEW FROM OLD STOCK SIEMENS SELEN RECTIFIERS, FRAKO CAPACITORS,SIEMENS RESISTORS ECT ALL VOLTAGES EXACTLY ACCORDING TO EMT CIRCUIT DIAGRAM AND SUFFICIENTLY DIMENSIONED FOR 2 MONO 139 EMT ALL CORD INCLUDED Output made with XLR, but can be changed with RCAs on buyers request Made by german broadcast engineerAlfred Bokrand comes with guarantee