[b]6DJ8 HISTORY[/b] HISTORY: ------- The 6DJ8 is a frame grid sharp cut-off twin (dual) triode with separate cathodes originally intended for use as a cascode circuits, RF and IF amplifiers, mixer and phase inverter stages. Originally the 6DJ8 had popular applications in: tuners in television receivers, front ends of VHF radio receivers. One triode acted as the local oscillator and the other as the mixer (frequency changer). Tektronix test equipment. Although not designed for the purpose the ECC88 has found favour with builders of high performance audio equipment. The tube features high transconductance, low plate resistance and low noise properties. PCC88=7DJ8 can be substituted for the 6DJ8/ECC88 6N23P=Russian made 6DJ8/ECC88 6N1P subs are 6922 and 6DJ8 ELECTRICAL DATA: --------------- MAX RATINGS: ----------- Heater voltage 6.3V Heater current 365mA Max plate voltage (Ia=0) 550V Max operating plate voltage 130V * Max plate dissipation 1.8W Max plate current 25mA Max grid voltage -50V TYPICAL OPERATION: ----------------- Heater = 6.3 Heater Current = 365ma Vplate = 90V Vgrid = -1.2V Iplate = 15ma Rplate = 2650 ohms Gm = 12500 Mu = 33 The Best Sounding 6DJ8=ECC88 ever made are: ------------------------------------------ 6DJ8 Siemens West Germany 1960's (nothing beats this tube; accurate, open, focused, detailed, airy, tight bass) 6DJ8 Amperex Bugle Boy Holland "D" getter 1950's (superbly musical 6DJ8, nice articulate bass, 3D sound) 6DJ8 Telefunken West Germany 1960's (a little bass shy, but superbly smooth and listenable long term) 6DJ8 Amperex Bugle Boy Holland 1960's 6DJ8 Amperex Holland 1960's and Amperex Holland Globe Logo late 1960's - mid 1970's (some are branded Philips Miniwatt) CV5358=6DJ8 Mullard 1960's (smooth, good bass, the older versions are the best) 6DJ8 Mullard 1960's (either branded Mullard or Philips or Amperex Great Britain) 6DJ8 Sylvania late 1960's - mid 1970's (excellent sound for the money, best value) 6DJ8 GE USA 1960's - 1970's (good value)
