1 low noise pair) ECC85=6AQ8 RCA Japan by Hitachi 1970”s same build

1 tube) 10.0/15ma Gm=6800/7500 Japan branded Great Britain

1 tube) 10.4/14.4ma Gm=67000/7900 branded made in Japan

• Tested on Amplitrex AT1000
  
• Good Ma range 9-11ma
• Good Gm = 6000
  
• Vplate = 250V, Vgrid = -2V
• Low Noise and not microphonic

(6AQ8 Specs: Filament=6.3V @ 435ma, Mu=57, Gm=5700)

the best sounding are Telefunken, Siemens, Holland and Mullard

Recommended for

– Luxman MQ80 amp
– EAR 509 amp
– EAR 534 amp
– EAR 890 amp
– EAR 834 Integrated amp
– Scott 335 Tuner
– Consonance M500
– Don Allen preamp
– TL Audio iTube Valve Dock mk II (2010)
– Music Angel KT88 MkIII