Best 6AQ8 listed at:

6AQ8=ECC85 Dual Triode (Filament=6.3V @ 435ma, Mu=57, Gm=5700, the best sounding are Telefunken, Siemens, Holland and Mullard)
(click on links below to check stock) ECC85 Holland $65/pair (recommended 2nd) ECC85 Mullard UK ECC85 Siemens West Germany ECC85 Telefunken West Germany $149/pair (recommended 1st) ECC85 Other Brands
6AQ8=ECC85 Holland Mullard Holland, Philips, Philip Miniwatt, RCA Holland, Sylvania Holland (all made in Heerlen, Holland) - Sansui 220 - Harman Kardon TA5000X 1962 6AQ8 Holland: ------------ NOS: --- listed below 6 pairs $65/pair) ECC85 Philips Miniwatt Holland NOS original boxes 1961-1962 (BEST VALUE) 4 pairs Kuhl-Tube cryo treated $75/pair) ECC85 Philips Miniwatt Holland NOS original boxes 1961-1962 (BEST VALUE) single tubes: ------------ 1 platinum low noise tube $85) ECC85 Mullard Holland NOS, copper grid posts, "D" getter halo with flat-foil crossbar mid-1950's in Mullard Kradlepack box (Gm=2230/2260)(best single) 1 platinum low noise tube $45) ECC85 Valvo Holland NOS 1966 in VALVO box (Gm=2460/2490) 1 platinum low noise tube $45) ECC85 Valvo Holland NOS 1963 in white box (Gm=2205/2230) 1 low noise tube $45) ECC85 Mullard Holland used/good, copper grid posts, "D" getter halo with flat-foil crossbar 1955, 1st series (Gm=2020/2150) 1 low noise tube $50) ECC85 Mullard Holland NOS, copper grid posts, "O" getter halo 1966 (Gm=2260/2360) (recommended) 1 platinum low noise tube $40) ECC85 Philips Holland NOS, copper grid posts, dimpled disc getter halo 1975 (2070/2100) (recommended) USED: ---- 1 low noise tube $45) 6AQ8 Columbia Phonograghs Holland made in Wein Austria plant "D" getter with crossbar 1957 used/tests like new (Gm=2000/2150) 1 low noise tube $20) 6AQ8 Philips Holland used/tests 85-90% 1975 (Gm=1860/2050) 1 tube $15) 6AQ8 Philips Miniwatt Holland used/test good/75% 1962 (Gm=1780/1880)
6AQ8=ECC85 Mullard England EAR 890 amp EAR 534 amp 6AQ8 MULLARD ENGLAND: -------------------- sold out
6AQ8=ECC85 Siemens West Germany 1 platinum tube $70) ECC85 Siemens NOS rebranded GE 1966 (Gm=2310/2370) (recommended) 1 platinum tube $75) ECC85 Siemens Halske NOS 1964 original yellow/blue Siemens Halske box (Gm=2235/2300) (recommended) 1 platinum tube $75) ECC85 Siemens Halske NOS branded Telefunken 1969 in white box (Gm=2070/2090) (recommended) 1 low noise tube $55) ECC85 Siemens Halske NOS branded Telefunken 1969 in white box 1969 (Gm=1780/2040)
6AQ8=ECC85 Telefunken West Germany - 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 Sonic Comments on ECC85 Telefunken: ---------------------------------- "The ECC85 Telefunken were installed in my EAR 509 Monoblocks. I'm using Tesla ECC803S for the front two stages, your Telefunken ECC85 as the main gain stage, and Sylvania 40KG6 for the output tubes. The increased dynamics and frequency extension in both bass and treble are immediately obvious, they sound much more alive. The noise level is lower, and the noise floor is improved, there is more detail, particularly in the mid bass/lower midrange. It's a major improvement over typical NOS 6AQ8=ECC85 tubes I've used in the past." PAIRS: Buy 2 pairs for $289 ----- 4 pairs $149/pair) ECC85 Telefunken <> NOS 1960's original boxes (recommended) listed below 2 pairs $149/pair) ECC85 Telefunken <> NOS 1960's in white boxes 3 pairs $159/pair) ECC85 Telefunken <> NOS Kuhl-Tube cryo-treated 1960's in white boxes (recommended) 1 platinum pair $140) ECC85 Telefunken <> NOS 1971 rebranded Siemens in Siemens boxes (recommended) 1 tube) Gm=2245/2265 1 tube) Gm=2220/2280 SINGLE TUBES: ------------ 1 platinum tube $70) ECC85 Telefunken <> NOS 1971 rebranded Siemens in Siemens box (Gm=2140/2170) 2 tubes $70 each) ECC85 Telefunken <> NOS 1960's in white boxes 1 tube $70) ECC85 Telefunken <> NOS original box 1960's partially smeared printing USED: ---- 1 tube $35) ECC85 Telefunken <> used/good/90%+, some stains on glass from usage, good printing (Gm 1 tube $55) ECC85 Telefunken <> like new in original box 1960's, good printing (good value) 1 platinum tube $60) ECC85 Telefunken <> like new in white box 1960's, very good printing (good value, tests higher) 1 tube $20) 6AQ8 Telefunken no printing used: (1 section) 70% (1 section) 80%
6AQ8=ECC85 US Brands sold out
6AQ8=ECC85 Hungary / East German / JAPAN 1) 6AQ8 Ultron JAPAN used/tests 60-65% $5