Best AUDIO TUBES listed at:

(click on links below to check stock) 6B4G Triode $99/pr - $119/pair 6B5 / 6B6 / 6B7 / 6B8 / 6B10 6BA6 6BE6 6BH6 6BK7B 6BL7GT / 6BX7GT 6BL8=ECF80 6BM8=ECL82 6BN4 / 6BN6 / 6BN8 6BQ5=EL84 6BQ7A 6C4 / 6C5 / 6C6 / 6C8 / 6C10 6CS6 / 6CS7 6CW5=EL86 6DA6=EF89 6DE7 6DH7=EM85 Tuning Eye 6DL5=EL95 6DN7 6DS4 Nuvistor
for 6B4G STOCK

6B5 Dual Triode / 6B6G 1) 6B5 RCA NOS 1940's $25 2) 6B6 International metal tube NOS $7 0) 6B6G NOS $10
6B7 Pentode / 6B8 metal can / 6B8G Pentode 1) 6B7G National Union NOS $12 0) 6B7G Ken Rad, RCA/Cunningham used/good 4) 6B8 metal NOS $5: (1) Dumont (1) Ken Rad (2) GE (1) National Union 1) 6B8 metal used $30 6) 6B8G Ken Rad NOS $6 4) 6B8G Philco, Sylvania, (2) Raytheon NOS $6
6B10 Dual Diode - Dual Triode 6B10 NOS $7:SPECIAL $3 EACH AS-IS UNTESTED (min. 4) 5) RCA 3) GE branded RCA 8) GE 2) Sylvania 1) IEC Mullard made in JAPAN
6BA6=5749=EF93 Pentode (Also see 5749=6AB6W) - Teaberry Model T Radio 1975 6BA6/EF93 European Brands: ------------------------- 1 pair $25) CV4009=6BA6W=5749 Brimar NOS 1967-1973 1 tube) Gm=3700 1972 1 tube) Gm=3800 1973 1 quad $50) CV4009=6BA6W=5749 Brimar NOS 1967-1973 1 tube) Gm=3700 1967 1 tube) Gm=3750 1967 1 tube) Gm=3750 1969 1 tube) Gm=3750 1973 1 quad $50) CV4009=6BA6W=5749 Brimar NOS 1972-1973 1 tube) Gm=3800 1973 1 tube) Gm=3800 1973 1 tube) Gm=3800 1972 1 tube) Gm=3900 1972 1 pair $25) CV4009=6BA6W=5749 Brimar NOS 1969-1972 1 tube) Gm=3500 1972 1 tube) Gm=3600 1969 1 pair $25) CV4009=6BA6W=5749 Brimar NOS 1967-1972 1 tube) Gm=3900 1967 1 tube) Gm=4100 1972 1 pair $25) CV4009=6BA6W=5749 Brimar NOS 1967-1969 1 tube) Gm=3400 1967 1 tube) Gm=3500 1969 14 tubes $10 ea) 6BA6 Brimar England NOS in white boxes 1960's 4 tubes $10 ea) EF93 Philips France NOS 1969 3 tubes $10 ea) EF93 Valvo made by Mullard NOS 1963 1 tube $12) EF93 Valvo Holland "U" getter NOS 1950's date code on bttom of tube (mP series) 6BA6 US Brands NOS: ------------------ 1) CBS $6 1) GE 1961 $6 2) GB-5749=6BA6W Sylvania "GOLD BRAND" Gold Pins NOS 1960's $10 ea (recommended) 6BA6 used: --------- 1) 6BA6 Philco by Sylvania like new 1950's $5 1) 6BA6 Matsushita JAPAN like new 1960's $4.50 50) 5749=6BA6W US Brands NOS $4 SPECIAL $2 EACH AS-IS UNTESTED (min. 10) 30) 6BA6 US Brands used/test good $2.50 SPECIAL $1 EACH AS-IS UNTESTED (min. 10)
6BA5 / 6BA7 / 6BA8 / 6BA11 2) 6BA5 Sylvania NOS $6 0) 6BA7 US Brands NOS 3) 6BA7 RCA Black Plate NOS 1952 in white boxes $10 30) 6BA8A US Brands NOS $6 SPECIAL $2 EACH AS-IS UNTESTED (min. 10) 14) 6BA11 NOS $6.50SPECIAL $2 EACH AS-IS UNTESTED (min. 10)
6BC4 Triode / 6BC5=6CE5 / 6BC7 20) 6BC4 US Brands NOS (GE, RCA, Sylvania) $8 ea SPECIAL $3 EACH AS-IS UNTESTED (min. 4) 100) 6BC5=6CE5 NOS $3 SPECIAL $1.50 EACH AS-IS UNTESTED (min. 10) or 100 for $99 NOS as-is 6) 6BC7 NOS $3.50 SPECIAL $2 EACH AS-IS UNTESTED (min. 6)
6BC8=6BS8 Dual Triode 6BC8 see 6BS8 listed below
6BD5GT / 6BD6 Pentode / 6BE3=6BZ3 8) 6BD5GT NOS $3.50SPECIAL $2 EACH AS-IS UNTESTED (min. 8) 8) 6BD6 US Brands NOS $3SPECIAL $1.50 EACH AS-IS UNTESTED (min. 8) 6BE3 NOS $8:SPECIAL $3 EACH AS-IS UNTESTED (min. 10) 11) GE 5) Sylvania
6BE6=5750=EK90 Heptode (Also see 5915, 5750=high reliability 6BE6) 6BE6 European Brands: -------------------- 5) 6BE6=EK90 Mullard NOS old logo original boxes 1960's $12 (best in stock) (4 for $43) 4) EK90 Mullard branded Valvo West Germany NOS in VALVO boxes 1960's $10 (recommended) (4 for $37) 1) 6BE6 Mullard used/like new 1957 good printing $10 1) 6BE6 Philips France NOS white box $8 6BE6 US Brands NOS $6 ea or SPECIAL $3.50 EACH AS-IS UNTESTED (min. 6) ------------------------ 10) Sylvania 6) GE 6) RCA 6BE6 used/good: -------------- 4) 6BE6 US Brands used/test like new $3.25 25) 6BE6 US Brands used/test good $2.50SPECIAL $1.50 EACH AS-IS UNTESTED (min. 10) 6BE6 Other Brands: ----------------- 1) 6BE6 Ten Kobe Kogyo Corp. (Kobe, Japan) NOS $4 6BE6W=5750 US Brands: (also see 5750) -------------------- 3) 5750=6BE6W GE 5-Star Black Plates NOS 1960's $6 2) 5750=6BE6W GE Black Plates NOS 1970's $5 (recommended) 5) 5750 Sylvania JAN NOS $5
6BF5 / 6BF6 / 6BF7 / 6BF11 4) 6BF5 US Brands NOS $4 20) 6BF6 US Brands NOS $3.50SPECIAL $2 EACH AS-IS UNTESTED (min. 10) 3) 6BF7 US Brands NOS $6 6) 6BF11 NOS $6
6BG6G / 6BG6GA Beam Power Tetrode - Minnesota Audio Labs 2) 6BG6G RCA NOS 1950's silver printing $15 ea 2) 6BG6G NOS $13: (1) RCA (1) Tungsol 3) 6BG6G used/good $8 6BG6GA NOS $12: (2) GE branded Reliable Selectron 1957 (recommended) (1) Tungsol branded Coronado (1) GE 1960 Gm=6500 (1) GE 1961 Gm=6000 3) 6BG6GA Sylvania low hours like new $8 1) 6BG6GA RCA branded Sylvania used/tests good $5
6BH6=6661=E90F Pentode (see 7693 for Premium 6BH6 replacement) - Marantz 8B 6BH6 European Brands: -------------------- 1) 6BH6 Brimar England NOS 1961 original box $15 1) 6BH6 Brimar England NOS red print 1950's 65% $7 6BH6 US Brands: -------------- 6BH6 NOS $5 SPECIAL $2.50 EACH AS-IS UNTESTED (min. 10) 10) Sylvania branded as Philips ECG USA 1) RCA (recommended) 4) Sylvania (recommended) 8) GE 4) GE branded as Motorola (recommended) 5) GE branded RCA 9) 6661=6BH6 GE NOS $5 (recommended) 1) JG-6BH6 GE NOS 1962 $6 1) 6BH6 GE Black Plate "D" getter 1951 $10 (oldest) 1 pair $15) 6BH6 GE black plate NOS "U" getter halo 1953-1956 1 pair $15) 6BH6 GE black plate NOS "U" getter halo 1953-1956 6BH6 TUNGSOL: ------------ 1) 6BH6 Tungsol NOS 1950's $10 6BH6 USED: --------- 1) 6BH6 RCA used/tests like new 1950's $6 40) 6BH6 US Brands used/test good $2.25 (10 for $20) 20) 6BH6 pullouts from equipment 10 for $12 as-is, most are good
6BH8=6AU8 Pentode / 6BH11 5) 6BH8 NOS $5 4) 6BH11 RCA NOS $5.50
6BJ6 Pentode / 6BJ7 / 6BJ8 100) 6BJ6 US Brands NOS $4 ea SPECIAL $2 EACH AS-IS UNTESTED (min. 10) or 100 for $150 NOS as-is
4) 6BJ7 NOS $3.50 14) 6BJ8 NOS $5 (4) RCA (4) GESPECIAL $2 EACH AS-IS UNTESTED (min. 10)
6BK4 / 6BK4C=6EL4A Sharp-Cutoff Triode 6BK4C original boxes $32 each: ----------------------------- 1) RCA 1) GE 4) Sylvania 2) Sylvania rebranded RCA 3) 6BK4C=6EL4A Realistic JAPAN NOS $30 1) 6BK4C GE NOS glass tilted in base $24 1) 6BK4C El Menco JAPAN used/tests good $15 1) 6BK4C/6EL4A RCA used/tests good $18 2) 6BK4C/6EL4A Sylvania used/tests good $18 (1) branded Magnavox (1) Sylvania 1) 6BK4C=6EL4 RCA used/good broken guide pin $10
6BK5 Tetrode 2) 6BK5 NOS $3.25
6BK7B Medium-Mu Dual Triode (sub for Chinese 6N1P) (6BK7B is a very good substitute for the 6N1P) (also see 6BQ7A and 6BZ7, you can sub a 6BK7B for a 6DJ8) (6.3 @ 450ma, Vplate max = 300V) 6BK7-B Application Data Class Va Ia Ra Gm Mu A 150 18.0 4,600 9300 43 1 pair $22) 6BK7B GE NOS 3 pairs $22/pair) 6BK7B RCA NOS black plates 1960's 2 pairs $22/pair) 6BK7B Sylvania NOS black plates 1960's 1 pair $22) 6BK7B Tungsol rebranded ITT NOS black plates around 1960, left tube has slightly faded top getter 1 platinum tube $12) 6BK7B Tungsol rebranded ITT NOS black plates around 1960 (Gm=2200/2250) 1 tube $10) 6BK7B Raytheon NOS black plates "U" getter mid 1950's
6BK11 Three-Section Triode (see 6C10 which can be used as a substitute) 0) 6BK11 NOS
6BL6 9) 6BL6 NOS $100
6BL7GTA Dual Triode for 6BL7GT / 6BL7GTA Dual Triode STOCK

6BL8=ECF80 Triode/Pentode for 6BL8 STOCK

6BM6 Klystron 22) 6BM6 US Brands NOS $69 ea
6BM8=ECL82 Triode-Pentode for 6BM8 STOCK

6BN4A Triode / 6BN5 Pentode 12) 6BN4A NOS $5 (9) RCA (1) Sylvania (2) GE 1) 6BN4A RCA NOS 50% $2 2) EL85=6BN5 Philips Miniwatt Holland NOS $15
6BN6=6KS6 Pentode 6BN6 NOS 1960's - 1970's $4.25SPECIAL $2 EACH AS-IS UNTESTED (min. 10) 20) Westinghouse JAPAN 5) GE 2) RCA 5) JHS-Sylvania 1963 (recommended) 6BN6 NOS 1950's "D" or "U" getter halo $6 each: 6) Sylvania 1953-1954 (recommended) 3) Raytheon
6BN8 Dual-Diode Triode / 6BN11 1) 6BN8 RCA rebranded GE 1960's $11 1) 6BN8 RCA rebranded GE 1960's $11 1) 6BN8 GE Canada NOS $11 1) 6BN8 RCA NOS "U" getter 1956 $15 1) 6BN8 RCA Daystrom used/like new 1961 $8 1) 6BN8 Sylvania rebranded GE used/good 1963 $6.50 1) 6BN8 Hitachi JAPAN tests 60% 1966 $3 1) 6BN8 Sylvania ised/good 1957 "U" getter no printing $5 9) 6BN11 NOS $6.75SPECIAL $2.50 EACH NOS AS-IS UNTESTED FOR ALL 9
6BQ5 = EL84 / 7189 PENTODE TO BUY 6BQ5=EL84
TO BUY 7189 and 7189A
6BQ5/EL84 Near Equivalent = 6CH6/EL821 It is NOT a plug in equivalent for the 6BQ5, but a near equivalent in specs. The grid bias is different, but it is a 9 pin output tube of about the same output power. Similiar to EL84 Mullard, 6BQ5 RCA; same higher quality, long life and reliable. It gives crisp low distortion audio output and transformers designed for EL84 can use this tube. It is a lot more sensitive, and so needs less input to drive to full power. British made, mil-spec, nice black plates. Good for guitar amps or DIY amp projects. Many people love the sound of this tube over a 6BQ5/EL84 FULL SPECS ON 6CH6 listed on the EL84/6BQ5 page 0) EL821=6CH6 Mullard Black Plate NOS
6BQ6GTB=6CU6 Beam Power Tetrode 1) 6BQ6GT=6CU6 Telefunken Germany NOS original box $25 33) 6BQ6GTB NOS $3: (27) Sylvania (6) RCASPECIAL $1.95 EACH AS-IS UNTESTED (min. 10) or all 33 for $50 NOS as-is
6BQ7A=6BZ7 Medium-Mu Dual Triode (Vplate=125V, Vgrid=-1V, Iplate=15ma, Gm=9000, Mu=42, Rplate=4700 ohms) (also see 6BZ7 and 6BK7B) - Modwright Transporter - Schiit Lyr amp 2011 - Don Allen - Donald North Audio (DNA) Stratus TO BUY 6BQ7A
CRYO-TREATED: ------------ 1 pair $45) 6BQ7A RCA black plates NOS "O" getter CRYO-TREATED same build (recommended) 1 tube) 9.8/13.1ma 1970's 1 tube) 10/14ma 1970's NOT CRYO-TREATED: ---------------- 3 pairs $25/pair) 6BQ7A GE NOS
6BR5=EM80 Indicator Tube / 6BR8A for 6BR5 / EM80 STOCK
50) 6BR8A US Brands NOS see 6FV8
6BS3A / 6BS4 1) 6BS3A NOS $4.75 0) 6BS4 NOS
6BS8=6BC8 Dual Triode (6BC8 is a close substitute to a 6BS8) 2) 6BC8 GE NOS $7 6) 6BC8 Raytheon JAPAN NOS $7 ($15/pair) 2) 6BC8=6BS8 US Brands NOS $7 (1) RCA (1) Westinghouse 1) 6BC8 black plate "D" getter halo NOS $8 (1) CBS 1960 1) 6BC8 Westinghouse Canada like new $5 2) 6BC8 used/good $4 1) 6BS8 Tungsol NOS 1965 in 6BC8 box $8 (recommended)
6BU8 / 6BV7 / 6BV8 / 6BW4 rectifier / 6BW7 / 6BW8 / 6BW11 12) 6BU8 NOS $4 (10) Tungsol (10 for $29) 0) 6BV7 1) 6BV8 NOS $6.25 3) 6BV11 NOS $5.25 0) 6BW4 GE gray plate NOS 0) 6BW4 RCA black plates NOS 1960's 0) 6BW4 Sylvania black plates branded Philco NOS early 1960's 0) 6BW7 8) 6BW8 NOS $2.75 4) 6BW11 NOS $5.75
6BX4 Full-Wave Rectifier (MAZDA) (similar to 6X4, higher filament current 600ma for 6BX4 vs. 450ma for 6X4) 0) 6BX4 Mazda NOS 1960's
6BX6=EF80 Pentode Darkvoice 337se Pearlman 6) EF80 Valvo made in Holland NOS 1960's $10 each or $25/matched pair or $10 ea 1 pair $25) EF80 Mullard NOS 1971-1973 (best value) SINGLE TUBES: ------------ 1) EF80 Mullard "D" getter NOS 1960 original box $20 (best single) 1) EF80 Mullard "D" getter like new - reboxed - 1961 $15 1) EF80=6BX6 Amperex Bugle Boy Holland NOS 1962 $18 (recommended) 1) EF80 Siemens NOS 1978 mesh shield $10 1) EF80 Siemens NOS 1976 gray shield $10
6BX7GT Dual Triode (Medium-Mu) for 6BX7GT Dual Triode STOCK

6BY5G Full-Wave Rectifier / 6BY6 / 6BY8 1) 6BY5G used $4 1) 6BY5GA Tungsol NOS $7 6) 6BY6 US Brands NOS $5 (6 for $25) 6) 6BY8 US Brands NOS $3.50 (6 for $17)
6BY7=EF85 Pentode (also listed on european page) 4) EF85 Philips Miniwatt Holland NOS "D" getter 1961 $12 5) EF85=6BY7 Siemens branded Telefunken NOS 1969 $12 3) EF85 Sylvania Hungary NOS 1970's $8 3) EF85 International Hungary NOS 1970's $8
6BZ6=6JH6 / 6BZ7=6BQ7 VHF Dual Triode / 6BZ8=6BC8 10) 6BZ6 US Brands NOS $5.75 SPECIAL 10 for $25 NOS AS-IS UNTESTED (6BZ7 also see 6BQ7) 70) 6BZ7 GE NOS $3.50 (10 for $32) 4) 6BZ8=6BC8 US Brands NOS $5.50
6C4=EC90 Triode / 6C4WA 6C4 / 6C4WA STOCK

6C5 / 6C5G / 6C5GT Triode (mu=20, Gm=2000) - Gibson EH-100 1939 6C5 metal can: ------------- 3) 6C5 metal can NOS $7 (2) Raytheon (1) GE 14) 6C5 US brands metal used/test good $4SPECIAL 10 for $20 AS-IS UNTESTED 6C5G: ---- 0) 6C5GT glass NOS $10 ea: --------------------- 0) 6C5GT Sylvania low hours/test like new: -------------------------------------- 1) branded Tungsol 1951 (82/50) $6 1) branded RCA 1952 (85/50) $6 1) 6C5GT Hytron used/tests like new 1952 $6 (80/50)
6C6 Pentode 6C6 NOS: ------- pairs sold out SINGLE TUBES: ------------ 1 tube $10) RCA clear glass 1950's (54/31) 6C6 used: -------- 1 tube $6) Crosley by Sylvania 1952 (46/31) 1 tube $3.50) Super Silvertone 1940's (37/31)
6C7 Dual Diode Triode 0) 6C7 NOS $7
6C8G Dual Triode / 6C9 1) 6C8G Dumont by RCA NOS round plates 1950's $5.50 1) 6C8G RCA NOS round plates 1951 burgundy base $5.50 6C8G black round plates used/good $3.50 ea: 1) Sylvania 1) Tungsol 1) Raytheon 1) Knight by RCA 4) 6C9 NOS $14 (1) Sylvania branded as RCA
6C10=VT-23 Triple Triode (close sub = 6BK11) (Vfil=6.3V @ 600ma, Vplate max per section = 330V) (Pout max per section = 1W) Class A Amplifier: Plate Voltage = 250 V Grid No. 1 Voltage = -2 V Amplification Factor (Mu) = 100 Plate Resistance (approx) = 62.5Kohms Transconductance (Gm) = 1600 Plate Current = 1.2 mA - Fender Super Champ - Super Champ (adamflax.com) - Ampeg Jet modified for 6C10 - Ampeg R-12-RT ~1963 1 tube $45) 6C10 RCA NOS 1970 1 tube $45) 6C10 GE rebranded Raytheon NOS 1960's
6C33C-B Power Triode - Almarro A318A - BAT - Einstein - AYON AUDIO SPARK II - Joule Electra Stargate - http://www.taticaudio.com/ (6C33C-B SET AMP) - Navison NVS - 003G Click here to see 6C33C-B NOS 1985 Vplate=120V Vgrid=-37.5V Iplate=120ma Gm=29.8ma/V Mu=7.9 Rp=260ohms sold out
6CA4=EZ81=U709 Full-Wave Rectifier for 6CA4 / EZ81 STOCK

6CA5 7) 6CA5 GE NOS $3.15SPECIAL $2 EACH AS-IS UNTESTED (min. 7)
6CB5A 1) 6CB5A RCA NOS $10 1) 6CB5A used $5.50
6CA7=EL34 POWER PENTODE EL34 STOCK


6CB6A/6CF6 2) 6CB6 Telefunken Diamond NOS original box $15 100) 6CB6A NOS $3.50SPECIAL 10 for $19 NOS as-is or 100 for $139 NOS as-is 70) 6CB6A used/good $1.85SPECIAL $0.50 EACH AS-IS UNTESTED (min. 50)
6CD6G/6CD6GA/6DN6/6EX6 Beam Power Tetrode 1) 6CD6G CBS NOS $12 6) 6CD6G used/good $7 4) 6CD6GA US Brands NOS $7 3) 6CD6GA used/good $4
6CD7=EM34 Tuning Indicator (Eye Tube) / EM4 / EM1 EM34=6CD7, EM4, EM1 tuning eye STOCK
Click here to see CV394=EM34 Mullard
6CE5=6BC5 / 6CF6 Pentode / 6CG3=6CE3 Half-Wave Rectifier (12 pin compactron) 4) 6CE5=6BC5 NOS $3 4) 6CF6=6CB6A NOS $3.40 2) 6CG3/6BW3 Sylvania NOS $6
6CG7 Dual Triode (GE, RCA, Sylvania, Tungsol, Super Radiotron Australia) for 6CG7 / 6FQ7 Dual Triode STOCK

6CG8A Triode-Pentode 22) 6CG8A NOS $4.50SPECIAL $2.25 EACH AS-IS UNTESTED (min. 10)
6CH3 (6CH3 see 6DW4B)
6CH6=EL821=CV2127 Pentode (6CH6 has similar specs to EL84 with different pinout and higher input sensitivity) The ECH81 was designed by Mullard and was used as a "VIDEO OUTPUT PENTODE" with high mutual conductance (Gm), Vfil=6.3V @ 750ma, Vplate MAX = 275V, Pout MAX = 12 watts 6CH6 APPLICATION DATA: --------------------- Class Va Vg2 Vg1 Ia Ig2 Ra Gm A S/E 250 250 -4.5 40 6 50,000 11 This valve was used as the audio output valve in the Rees-Mace receiver AKA the Pye marine receiver AP100339 that was built in the 1950s and extensively used by British and Dutch navies. The question remains as to why the 6CH6 was the valve of choice for this receiver when so many purpose designed audio valves could have been selected. Sources specifically list it as a video amplifier. Note the high value of gm, necessary in order to obtain reasonable gain and power output with wideband signals, and for correct matching of video into coax cable. TV studio equipment racks used to be full of 6CH6s. EL821 PINOUT: ------------ 1: NC, sometimes connected to 9 2: Grid 3: Cathode 4,5: 6.3V Heater 6: NC 7: Plate 8: Screen grid 9: Internal shield and beam plates EL84 PINOUT: ----------- 1: NC (pins 1,6,8 are internally connected) 2: Grid 3: Cathode 4,5: 6.3V Heater 6: NC 7: Plate 8: NC 9: Screen It is NOT a plug-in equivalent for the 6BQ5, but a near equivalent in specs. The bias is different, but it is a 9 pin output tube of about the same output power. Similar to EL84 Mullard, 6BQ5 RCA but much higher quality, longer life and more reliability. It gives crips low distortion audio output and transformers designed for EL84 can use this tube. It is a lot more sensitive, and so needs less input to drive to full power. British made, mil-spec, nice black plates. Good for guitar amps or DIY amp projects. Many people love the sound of this tube over a 6BQ5/EL84. 6) EL821=6CH6 Brimar UK black plate like new 1960's $15 ea
6CH8 Pentode/Triode 6CH8 NOS $3.75: SPECIAL $2.25 EACH AS-IS UNTESTED (min. 4) 10) RCA branded GE 3) RCA 1) RCA branded Sylvania 1) RCA branded CBS
6CJ3=6DW4B Half-Wave Rectifier (6CJ3=6DW4, also see 6DW4 stock listing) - Leben CS 600 - Leben 660P 3) 6CJ3/6DW4B Sylvania tipped top NOS $9 ea (recommended) 3) 6CJ3 GE branded Zenith NOS not-tipped $8 ea (recommended) 1) 6CJ3 GE branded Zenith like new $5 1) 6CJ3 US brands used $3
6CK4 Triode 0) 6CK4 Sylvania NOS $8
6CK6=EL83 Pentode / (sub for Russian 6P15P-EV) (Decware EL83 amp 1999) -modified VOX AC30 -Decware 17) EL83 Telefunken Diamond NOS $20 ($45/matched pair) 8) EL83 Siemens East Germany NOS $15 ($35/matched pair) 5) EL83 Valvo $15 ($35/matched pair)
6CL3=6CK3 Have-Wave Rectifier / 6CL5 8) 6CL3=6CK3 NOS $5.20 6) 6CL5 NOS $5.95
6CL6=6197=6677 / 6CL8A 6CL6 US Brands NOS $6.25SPECIAL $3.25 EACH AS-IS UNTESTED (min. 10) or 50 for $115 NOS as-is (4) GE (20) FAA RCA (20) RCA and RCA JAN (5) Sylvania (1) Philco 8) 6CL6 used/good $3.50 2) 6197=6CL6 GE JAN NOS in white boxes 1963 $6.25 15) 6CL8A NOS $4.50SPECIAL $2.25 EACH AS-IS UNTESTED (min. 10)
6CM3 / 6CM5=EL36 Pentode 3) 6CM3/6DN3 GE NOS $5.40 6CM5=EL36 NOS original boxes $40 (4) Amperex Bugle Boy Great Britian by Mullard 1964 (2) Amperex Great Britain by Mullard 1961-1962
6CM6 Tetrode / 6CM7 Dual Triode / 6CM8 Seeburg DS160 1962 Aria WV11 6CM6 US Brands NOS $7 ea or SPECIAL $4 EACH AS-IS UNTESTED (min. 4) (10) Sylvania (5) RCA (1) Raytheon JAPAN $5 12) 6CM6 US Brands used/good $4 (10 for $37)
6CM7 Dual Triode / 6CM8 3 tubes $6 each) 6CM7 RCA NOS 1960's same date codes BB 4 matched pairs $20/pair) 6CM7 GE NOS 1960's 1 tube $10) 6CM7 Tungsol rebranded RCA "U" getter 1950's 10) 6CM7 used/good $2.75 (10 for $24) 5) 6CM8 GE NOS $3.50
6CN6=EL38=CV450 Pentode (top cap anode, octal base)(spec sheets available, good tube for audio) (Vplate=800V max, Vplate=8000V! peak pulse)(this tube is not a sub for a EL37, but is built like a EL37) (the EL38 bias is much different and Vplate requirements are much lower, but makes a very good DIY'er tube and they sound very good, customers have reported very good results) (Data as follows: Vf=6.3V, If=1.4A, Va=250V, Ik=100mA, S=14mA/V, Pa=25W) 0) EL38=6CN6 Mullard
6CN7 6) 6CN7 NOS $4.50
6CQ6=EF92 Pentode / 6CR6 - Little Dot II++ headphone amp 1 pair $15) 6CQ6/EF92 Haltron by Mullard England used/good 1960's 8) 6CR6 US Brands NOS $5 2) 6CR6 used $2
6CS6=EH90 Heptode / 6CS7 6CS6 US Brands NOS "D" or "U" getter 1950's $8 ea: ------------------------------------------------- 1) GE 1) CBS black plate "D" getter halo 1) Raytheon 1956 "U" getter halo 6CS6 ALL BRANDS 1960's - 1970's $5 ea: ------------------------------------- 40) RCA Brazil (recommended)SPECIAL $2.25 EACH AS-IS UNTESTED (min. 10) or 40 for $60 NOS as-is 1) Westinghouse Canada 3) GE 2) Sylvania 1) RCA branded Motorola 2) Raytheon JAPAN
6CS7 Dual Triode Leben CS 600 integrated amp Leben CS 660P power amp PAIRS: ----- TO BUY 6CS7 SYLVANIA BLACK PLATE PAIRS NOS
SYLVANIA SINGLE TUBES: --------------------- 1 tube $25) 6CS7 Sylvania NOS tack welded "D" getter halo 1956 1 tube $15) 6CS7 Crosley by Sylvania used/good, tack welded "D" getter halo and 1 plate is tack welded 1955 1 tube $12) 6CS7 Sylvania branded RCA used/tests like new "U" getter 1950's 1 tube $10) 6CS7 Sylvania branded RCA used/good "U" getter 1950's 1 tube $15) 6CS7 Sylvania NOS "O" getter halo 1960's 6CS7 RCA 1960's: --------------- listed below (2 pairs of RCA for $55) 1 pair $30) 6CS7 RCA NOS tall gray ribbed plates 1960's - 1970 1 pair $30) 6CS7 RCA NOS tall gray ribbed plates 1960's 1 pair $30) 6CS7 RCA NOS tall gray ribbed plates 1960's
6CU5 / 6CU6 / 6CU8 / 6CV7=EBC41 Dual-Diode/Triode 10) 6CU5 NOS $3.65SPECIAL $1.95 EACH AS-IS UNTESTED (min. 10) 4) 6CU6 NOS $3.60 10) 6CU8 NOS $3 1) EBC41=6CV7 Amperex Bugle Boy England 1950's $25 (rimlock base)
6CW4=6DS4 Nuvistor (6DS4 is a 6CW4 with extended cutoff) - Pearl Microphone Lab CT-40 - CJ Premier 6 - Musical Fidelity M3 Nu-Vista Integrated amp PAIRS: ----- 1 pair $45) 6CW4 Sylvania branded RCA NOS original boxes 1970's 2 pairs $45/pair) 6CW4 Sylvania NOS original boxes 1960's - 1970's 2 pairs $29/pair) 6CW4 Sylvania used/test like new, no printing, original boxes 1960's (good value) SINGLE 6CW4: ----------- 6CW4 NOS $20: 1) RCA 1) GE 2) Sylvania 2) 6CW4 RTN Japan test like new/high emission $12 2) 6CW4 RCA used/tests very good $11 1) 6CW4 Sylvania used/test good $11 2) 6CW4 Japan used/tests very good $10 1) 6CW4 RCA Japan NOS $15 6DS4: ---- see 6DS4 listing for stock
6CW5=EL86 Power Amp Pentode (similar to EL84 but NOT a direct replacement, has same pinout but also has higher input sensitivity=requires less negative grid bias than EL84, 6.3V @ 760ma Filament, 12 watts max, around 18 watts PP at 250Vplate and Iplate = 55ma; most are run at 250Vplate or less, mu=8, Rplate=23Kohms) - Jadis preamp 6CW5 Holland: ------------ 3 pairs $45/pair) EL86 Valvo Holland NOS original boxes 1969 SINGLE TUBES: ------------ 1) EL86 Amperex Bugle Boy Holland NOS 1962 $35 (69ma) 1) EL86 Amperex Bugle Boy Holland NOS 1965 $30 (49ma) 1) EL86 Amperex Bugle Boy Holland NOS 1966 $25 (39ma) 1) EL86 RCA Holland NOS 1969 $25 1) EL86 Amperex Holland branded Amperex USA 1966 $25 6CW5 JAPAN: ---------- 1) ECL86 Amperex made in JAPAN NOS $15 5) ECL86=6CW5 United made in JAPAN NOS 1970's $15 ($40/matched pair) 1 pair $35) 6CW5 GE JAPAN NOS well made good value (recommended) 6CW5 Mullard: ------------ TO BUY EL86 Philips Mullard NOS
10 pairs $45/pair) EL86=6CW5 Mullard rebranded Philips NOS 1960's in Philips boxes (Kuhl-Tube cryo treated pairs $55/pair and $110/quad)
6CW7=ECC84 Dual Triode PAIRS: ----- 1 pair $35) ECC84 Mullard branded VALVO NOS 1962 same date codes in VALVO boxes (m91 series) 1 pair $35) ECC84 Mullard branded Philips NOS 1965 same date codes in Philips boxes (m92 series) SINGLE TUBES: ------------ 1 tube $15) ECC84 Mullard branded SONOTONE WEST GERMANY NOS 1960 in SONOTONE box (m91 series) 1 tube $15) ECC84 VALVO Hamburg West Germany NOS 1960 original box (m92 series) 1 tube $15) ECC84 Mullard branded VALVO NOS 1962 in VALVO box (m91 series) 1 tube $20) ECC84 Siemens NOS branded SONOTONE WEST GERMANY NOS 1958 in SONOTONE box (m92 series) tests higher 1 tube $20) ECC84 Siemens NOS branded SONOTONE WEST GERMANY NOS 1958 in SONOTONE box (m92 series) 1 tube $20) ECC84 Siemens NOS branded SONOTONE WEST GERMANY NOS 1960 in SONOTONE box 1 tube $15) ECC84 Philips Miniwatt by Mullard NOS 1962 (m91 series) EAST GERMANY: ------------ 10) 6CW7=ECC84 International Servicemaster made in East Germany NOS original boxes 1970's $5 ($15/matched pair) 9) 6CW7=ECC84 Teonex NOS in white boxes $4SPECIAL $2 EACH AS-IS UNTESTED (min. 9) 19) 6CW7=ECC84 Ultron NOS $4SPECIAL $2 EACH AS-IS UNTESTED (min. 10)
6CX8 14) 6CX8 US Brands NOS $5SPECIAL $2 EACH AS-IS UNTESTED (min. 4)
6CY5 RF Tetrode 50) 6CY5 NOS $6: SPECIAL $3 EACH AS-IS UNTESTED (min. 10) or 50 for $99 NOS as-is (31) Sylvania (9) GE
6CY7 Dual Triode - Woo Audio 1 pair $15) 6CY7 GE NOS; 1 tube GE white printing, 1 tube GE green printing 1 pair $15) 6CY7 GE NOS; 1 tube branded GE, 1 tube branded RCA 3) 6CY7 used/good $4 ea
6CZ5 Beam Power Tube (you cannot sub a 6CZ5 for a 6973, see 6973 for more details) 1) 6CZ5 RCA black plate NOS 1960's in white box $10 1) 6CZ5 GE Canada black plate NOS 1960's in GE box $10 1) 6CZ5 RCA black plate short bottle used/tests like new 1950's $6 (95/60)
6D4 / 6D6 Pentode 25) 6D4 NOS $6.50 (15) CBSSPECIAL $3 EACH AS-IS UNTESTED (min. 10) or 20 for $50 NOS as-is 1) 6D6 Ken Rad NOS small dent in top cap in original box 1940's $7 1) 6D6 RCA NOS 1949 smeared base printing in RCA box $7 8) 6D6 used/test like new $5 30) 6D6 used/test good $4 eaSPECIAL $2 EACH AS-IS UNTESTED (Min. 4) or $1.50 ea for all as-is
6D7 Pentode / 6D8 Heptode/ 6D10 Triple Triode - Belmont 425 radio 0) 6D7 Sylvania NOS $7 1) 6D8G Tungsol NOS $6 2) 6D8G RCA NOS $6 1) 6D8G Sylvania NOS $6 0) 6D10 GE NOS $0: (McIntosh MX110 preamp, Tascam M-520 (solid state conversion)
6DA4A=6DM4 Rectifier / 6DA5=EM81 Electron Ray Indicator (6DA4A used in Eddie Current Zana Deux Headphone amp 2007) 1 pair $15) 6DA4A Sylvania coin-base NOS 1970's 2 pairs $13/pair) 6DA4A Raytheon JAPAN black base NOS 1960's 1 tube $6) 6DA4A RCA coin-base NOS 1970's tilted glass 1 tube $7) 6DA4A Sylvania black base NOS 1960's 1 tube $7) 6DA4A Sylvania black base NOS 1960's 1 tube $4) 6DA4A used/good 6DA5=EM81 tuning eye STOCK

6DA6=EF89 Pentode Grundig TW 501G 1959 radio Grundig 3095 ML/USA 1956 radio Blaupunkt radio 50) EF89=6DA6 Telefunken <> Diamond Bottom <> NOS $20 ea or (4 for $72) 1) EF89 Telefunken <> bottom used/good $10 1) EF89 Philips Miniwatt Holland "D" getter 1961 used/like new in white box $15 1) EF89/6DA6 Siemens branded GE Germany NOS 1966 in white box $15
6DB5 / 6DC6 / 6DC8=EBF89 / 6DE4 13) 6DB5 NOS $2.85 (10 for $20) 0) 6DC6 RCA NOS $7.50 4) 6DC6 RCA rebranded Tungsol like new 1950's $5 6DC8=EBF89 (see EBF89 listing on European page) 4) 6DE4 NOS $3
6DE6 10) 6DE6 NOS $3 (10 for $25)
6DE7 - Woo Audio WA6SE (2008-present) 6DE7 NOS: SKINNY BOTTLE -------- 1 pair $35) 6DE7 Sylvania NOS original boxes 1960's "O" getter halo, same date codes 1 pair $30) 6DE7 RCA NOS original boxes 1960's "O" getter halo 3 pairs $35/pair) 6DE7 Tungsol black plates NOS around 1960 (recommended) (best pairs) (2 pairs for $65) 1 pair $30) 6DE7 RCA NOS original boxes 1960's "O" getter halo 1 pair $30) 6DE7 RCA NOS original boxes 1960's - 1970's "O" getter halo 1 pair $30) 6DE7 RCA NOS original boxes 1960's - 1970's "O" getter halo single tubes: ------------ 1 tube $12) 6DE7 Sylvania CANADA NOS 1960's
6DF6 / 6DG6GT=6W6GT 2) 6DF6 NOS $4 (also see 6W6GT which is a sub for a 6DG6GT) 0) 6DG6GT NOS $4 1) 6DG6GT used/good $2.25
6DH7=EM85 Indicator Tube Lorenz Goldsuper W25 radio Grundig 3045W radio 1953 6DH7=EM85 Indicator Tube

6DJ8 = ECC88 DUAL TRIODE 6DJ8 STOCK


6922 / E88CC / CCa DUAL TRIODE 6922 STOCK


7308 = E188CC DUAL TRIODE 7308 STOCK


6DK6 Pentode 100) 6DK6 US Brands NOS $3.25SPECIAL $1.75 EACH AS-IS UNTESTED or $0.99 ea for all NOS as-is
6DL3=6DK3 1) 6DL3 NOS $5.70 15) 6DK3=6DL3 GE NOS $5.70 (10 for $49) 1) 6DL3=6DK3 NOS $5.50
6DL4=EC88 / E88C Triode - Marantz 10B - Bruce Moore listed below 1 tube $20) E88C Siemens Halske NOS 1977 1 tube $45) EC88 Telefunken <> NOS gold pins 1 tube $25) EC88 Amperex Bugle Boy Holland NOS 1966 1 pair $40) E88C Siemens NOS, same plates, different getter halo 1 tube) 1966 1 tube) 1977 1 tube $20) EC88 RCA Germany by Siemens NOS 1966-1968 1 tube $20) EC88 Valvo Germany NOS 1970 1 pair $30) 6DL4/EC88 United France NOS 1981-1982
6DL5=EL95 Pentode - Grundig 5060 radio - Grundig SO 190 Ua1 CONSOLE 1962 - Telefunken 5351W radio 1960's 6DL5 NOS European Brands: ------------------------ 1 pair $50) EL95 Siemens rebranded Telefunken NOS 1968-1970 (best in stock) 3 pairs $40/pair) EL95 Siemens rebranded Philips NOS 1966-1968 2 pairs $30/pair) EL95 Valvo rebranded CEI in CEI boxes 1973 (best value) single tubes: ------------ 1 tube $15) 6DL5 Amperex Bugle Boy Great Britain by Mullard NOS 1962 1 tube $10) EL95 Valvo branded Siemens NOS 1973 1 tube $12) 6DL5 Siemens branded as IEC Mullard NOS in original box 1966 1 tube $12) 6DL5 Tungsol West Germany by Siemens NOS 1963 2 tubes $6/ea) EL95 Haltron East Germany NOS 1970's USED: ---- 1) 6DL5 Siemens Halske Germany used/good 1966 $6 2) 6DL5 Siemens Halske Germany used/good 1960 $7 ea 1) 6DL5 East German rebranded Mullard used/good $4
6DM4A (also see 6DA4A) / 6DN6 7) 6DM4A RCA coin-base NOS $5SPECIAL $2.75 EACH AS-IS UNTESTED (min. 7) 3) 6DN3=6CM3 NOS $5.25 8) 6DN6=6CD6G NOS $6.25SPECIAL $3 EACH AS-IS UNTESTED (min. 4)
6DN7 Dual Triode - Bottlehead S.E.X. amp (Headphone amp) - Bottlehead SMACK - CONN organ console amp 1970's 2 channel - MFA Luminence preamp 1990 GE: -- 1 pair $28) 6DN7 GE NOS same style plates 1 tube) 6DN7 GE "O" getter NOS rebranded RCA 1960's (1 triode) black plate (1 triode) gray plate 1 tube) 6DN7 GE "D" getter NOS rebranded Sylvania 1960's (1 triode) black plate (1 triode) gray plate SINGLE TUBES: ------------ 1 tube $10) 6DN7 GE branded Hytron early 1960's 1 tube $10) 6DN7 GE "D" getter NOS 1961 (1 triode) black plate (1 triode) gray plate 1 tube $10) 6DN7 GE "O" getter NOS rebranded RCA 1960's (1 triode) gray plate (1 triode) gray plate 1 tube $10) 6DN7 GE "O" getter NOS rebranded Sylvania 1960's (1 triode) black plate (1 triode) gray plate RCA: --- 1 tube $10) 6DN7 RCA black base black plates NOS around 1970 SYLVANIA: -------- sold 1 tube $10) 6DN7 Sylvania coin-base black plates NOS 1970's USED: ---- 1) 6DN7 used/low hours like new $6 4) 6DN7 used/test good $4
6DQ4 / 6DQ5 Power Tetrode 4) 6DQ4 RCA NOS $5 20) 6DQ5 US Brands NOS $14: (5) RCA (4) Sylvania (5) GE branded RCA SPECIAL $6.50 EACH AS-IS UNTESTED (min. 4) or 10 for $99 TESTED NOS
6DQ6A / 6DQ6B=6GW6 Beam Power Tube 1) 6DQ6 Zenith by Tungsol used/good 1957 $4.25 1) 6DQ6A Super Radiotron Australia NOS 1960's $9 1) 6DQ6A Zenith by Tungsol used/good 1957 $4.25 1) 6DQ6A Zenith by Tungsol used/good 1959 $4.25 1) 6DQ6A Sylvania used/good $4.25 1) 6DQ6A RCA no print used/good $4.25 1) 6DQ6A Channel Master JAPAN used/good $4.25 2) 6DQ6B NOS $11 ea 1) 6DQ6B JAPAN NOS in white box, no printing 1960's $6 (59/30) 1) 6DQ6B Sylvania used/good, rattle inside base 1960's $4.50 (60/30) 1) 6DQ6B Olympia by GE used/good 1960's $3.95 (49/30) 1) 6DQ6B Curtis Mathes hi-fi JAPAN used/good 1960's $4.50 (66/30) 1) 6DQ6B ALLIED JAPAN used/good 1960's $4.50 (58/30) 1) 6DQ6B Philco by Sylvania used/good 1967, broekn center guide pin $3 (60/30)
6DR7 Dual-Triode 2) 6DR7 Sylvania branded GE $7 (don't match) 0) 6DR7 RCA NOS 1960's 1) 6DR7 RCA NOS 1 section 75% 1 section 100% $5 2) 6DR7 RCA used/good 1960's $4
6DS4 Nuvistor / 6DS5 1 pair $45) 6DS4 Sylvania NOS original boxes, 1 can has small amount of surface pitting (strongest pair) 1 pair $45) 6DS4 GE NOS original boxes 1 pair $45) 6DS4 GE rebranded Admiral NOS 1966-1968 1 pair $40) 6DS4 JAPAN NOS 1960's (strong pair) 1 tube) branded RCA JAPAN 1 tube) branded GE JAPAN 1 tube $16) 6DS4 Sylvania NOS 1 tube $15) 6DS4 GE NOS small amount of rust on metal can 1) 6DS4 Sylvania used/like new some rust on can $11 1) 6DS4 Sylvania used/tests good $8 24) 6DS5 NOS $3 (11) GESPECIAL $1.75 EACH AS-IS UNTESTED (min. 10)
6DT5 / 6DT6/A / 6DT8 1) 6DT3=6DQ3 NOS $10 4) 6DT5 NOS $4 15) 6DT6A NOS $3SPECIAL $1.75 EACH AS-IS UNTESTED (min. 10) 6DT8 NOS $9:SPECIAL $4 EACH AS-IS UNTESTED (min. 4) 10) GE 1) RCA
6DW4/6DW4B=6CJ3 / 6DW5 (also see 6CJ3 listing) 1) 6DW4 Sylvania branded GE NOS tipped $6 4) 6DW4/A used/good $3.50 6DW4B NOS $7: 1) RCA 0) Sylvania 1) Sylvania branded International tipped 2) 6DW4B Westinghouse JAPAN NOS in white boxes 1974 $5 1) 6DW4B RCA used $3.25 4) 6DW4B US Brands used $3 1) 6DW5 Sylvania NOS 1950's $9 1) 6DW5 RCA $9
6DV4 Nuvistor / 6DX4 11) 6DV4 NOS $11 (7) GE (4) Tungsol SPECIAL $5 EACH AS-IS UNTESTED (min. 4) 1) 6DX4 NOS $6
6DX8=ECL84 Shindo Monbrison Preamp 10 pairs @ $15/pair) ECL84=6DX8 GE JAPAN or RCA JAPAN NOS
6DS4=6CW4 (6DS4=6CW4 with higher cutoff frequency) * see 6CW4 listed above for stock on 6DS4
6DZ4=6AF4A Triode (6DZ4 is used in Marantz 10B tuner, also see 6AF4A) 6DZ4 NOS $6: (1) GE (2) Raytheon JAPAN (1) Magnavox JAPAN (1) 6DZ4 GE NOS 60-65% $2.50
6DY7 / 6DZ7 0) 6DY7 0) 6DZ7
for 6E5 -> 6KZ8 STOCK