Best AUDIO TUBES listed at:

(click on links below to check stock) 12A / UX-112A / CX-112A Triode 12A4 / 12A5 / 12A6 / 12A7 / 12A8 12Axx Series / 12AE6 12AQ5 / 12AT6 / 12AV5 / 12AW6 12AT7=ECC81 Dual Triode 12AU6 / 12AV6 / 12AV7 / 12AX3 / 12AX4 12AU7=ECC82 Dual Triode 12AX7=ECC83 Dual Triode 12AY7 / 12AZ7 12B4 / 12Bxx Series / 12BA6 / 12BE6 / 12BH7A / 12BY7A / 12BZ7 12Cxx Series / 12DM7 / 12DT8 / 12DQ6B / 12E1 12Fxx Series / 12FM6 / 12FM7 / 12FQ7 12GN7A / 12H6 / 12J5 / / 12Kxx Series / 12Lxx Series / 12Qxxx Series / 12Rxx Series 12SA7 / 12SC7 / 12SF5 / 12SF7 / 12SG7 / 12SH7 / 12SJ7 / 12SK7 12SL7GT / 12SN7GT 12SQ7 / 12SQ7GT / 12SR7GT / 12SX7GT 12T10 / 12U7 Dual Triode / 12W6GT / 12X4 Rectifier / 12Z3
Type 12A / UX-112A / CX-112A Triode - RCA Radiola 16 1928 TO BUY 12A and UX-112

12A4 / 12A5 / 12A6 / 12A7 / 12A8 10) 12A4 US Brands NOS $5 2) 12A5 Philco, Raytheon NOS $4 1) 12A5 Raytheon used $2.50 1) 12A5 National Union used $2.50 8) 12A6 metal can NOS $3 (2) Ken Rad (6) RCA (Collins TCS14 1944) 10) 12A6GT Tungsol NOS 1940's $3.50 10) 12A7 NOS $5.75 (4) RCA 1) 12A7 RCA used $3 2) 12A8G Sylvania NOS $4 6) 12A8GT US Brands NOS $3.25
12AB5 / 12AC6 / 12AD7 (Webcor Hifi) T0 BUY 12AB5
6) 12AC6 NOS $3 0) 12AD7 NOS $40
12AE6 / 12AE6A Twin Diode - Medium-Mu Triode Headroom Millet hybrid headphone amplifier, which also can use 12FK6, 12FM6 T0 BUY 12AE6A
1 tube $6) 12AE6A Raytheon NOS D getter on top 1 tube $6) 12AE6A Raytheon NOS D getter on side 1 tube $7) 12AE6A Tungsol NOS D getter 1 tube $7) 12AE6 RCA NOS D getter white printing early 1950's
12AE7/12AE7A / 12AE10 1) 12AE7 Sylvania NOS $5 1) 12AE7 Philco by Sylvania NOS $5 10) 12AE10 NOS
12AF3 / 12AF6 / 12AH7 8) 12AF3 NOS $3.50 1) 12AF6 NOS $3.50 (2) used $2.25 8) 12AH7GT NOS $5.25 5) 12AJ6 NOS $4.75 2) 12AJ6 used $2.50
12AL5 Full-Wave Rectifier / 12AM8 Magnavox radio T0 BUY 12AL5
8) 12AL5 Telefunken <> NOS $8 1) 12AM8
12AQ5 / 12AT6 / 12AV5 / 12AW6 T0 BUY 12AQ5
T0 BUY 12AT6
12AT6 for (Fada 845) and (Zenith L518 circa 1953) 5) 12AV5GA NOS $3 7) 12AW6 NOS $2.50
12AT7 / ECC81 DUAL TRIODE T0 BUY 12AT7

12AU6 Pentode TO BUY 12AU6

12AU7 / ECC82 DUAL TRIODE T0 BUY 12AU7

12AV6 Dual-Diode and High-Mu Triode T0 BUY 12AV6

12AV7 Dual Triode (also see 5965 and 7062 listing) T0 BUY 12AV7

12AX3 Compactron Damping Diode (Except for heater characteristics, the 12AX3 is identical to the 6AX3, Irect max = 165ma) - LAMM L2 reference preamp power supply T0 BUY 12AX3

12AX4GTA/GTB Half-Wave Rectifier T0 BUY 12AX4

12AX7=ECC83 DUAL TRIODE T0 BUY 12AX7

12AY7 Dual Triode T0 BUY 12AY7

12AZ7 / 12AZ7A Dual Triode "Black Plates" (similar to 12AT7) McIntosh MC275 1950's: ------ 12AZ7 RCA NOS black plates copper grid posts square getter halo 1950's $25: 2) branded GE 1955 (not exact pair) 1) branded Sylvania 1) branded Tungsol 1) 12AZ7A Sylvania black plates NOS $15 1) 12AZ7A Sylvania black plates branded as Dumont 1960's high gain $15 1) 12AZ7 Sylvania black plates NOS tests 55% 1950's $4.50 12AZ7 black plates used/tested 1950's: 1) RCA "D" getter no printing $10
12AZ7 Dual Triode "Gray Plates" (similiar to 12AT7) GE: -- 1) 12AZ7A GE NOS $12 1) 12AZ7A GE NOS large U getter halo 1950's $30 (recommended) 1) 12AZ7A GE branded as Westinghouse NOS 1970's $12 RAYTHEON/RCA/TUNGSOL: -------------------- 1) 12AZ7A Tungsol gray plates copper grid posts "o" getter halo 1960's $20 JAPAN: ----- 1) 12AZ7 Raytheon JAPAN NOS 1960's $6
12B4/A Low-Mu Triode TO BUY 12B4A pairs

12B8GT 1) 12B8GT used $5
12BA6=HF93 Pentode Emerson 587 radio 1951 T0 BUY 12BA6 NOS

12BA7 / 12BD6 T0 BUY 12BA7 NOS
1) 12BD6 RCA NOS $6
12BE6=HK90 Heptode / 12BF6 T0 BUY 12BE6
T0 BUY 12BF6

12BH7/A Dual Triode T0 BUY 12BH7A

12BL6 8) 12BL6 used/test good $2
12BQ6GT / 12BQ6GTB 10) 12BQ6GT NOS $3 25) 12BQ6GTB NOS $3 4) 12BQ6GTB used/good $2
12BY7A=12BV7 Sharp Cutoff Pentode (Gm=13ma/V for 12BY7A, Gm=12ma/V for 12BV7, Power=6.5 watts max) Heathkit DX-35 1950's Kenwood TS-830S Transceiver Kenwood 520 Kenwood TS-20 Yaesu FT-101 Transceiver GE: -- TO BUY 12BY7A GE NOS
RCA: --- TO BUY 12BY7A RCA NOS
1) 12BY7A RCA "Tektronix Checked" tests like new 1960's $12 1) 12BY7A RCA "Tektronix Checked" NOS 1970's $15 1) 12BY7A RCA gray coated glass NOS "U" getter halo 1950's $15 7) 12BV7=12BY7A RCA NOS $11.50 (7 for $69) SYLVANIA: -------- TO BUY 12BY7A Sylvania NOS
WESTINGHOUSE: ------------ TO BUY 12BY7A Westinghouse NOS pairs
USED: ---- 35) 12BY7A US BRANDS used/test good $5.75 ea (6) Sylvania (2) Raytheon (8) RCA or
12BZ7 High-Mu Dual Triode (Max ratings: 300Vplate, 1.5 watts) (Vfil=12.6V @ 300ma) (Typical Operation Class A amp: Vplate=250V, Vgrid=-2V, Ip=2.5ma, Rp=31.8Kohms, Gm=3200, Mu=100) (The 12BZ7 has been subbed for a 12AX7 in some circuits) (The 12BZ7 has 2 times the Gm (3200 versus 1600) and lower plate resistance (31K versus 62K) and higher filament current (300ma versus 150ma) than a 12AX7) (The 12BZ7 was designed primarily for use as a sync separator and sync amplifier in television receivers. It is also useful in clipping circuits and as a general purpose audio amplifer) - Cary V12R amp - Cary PH-301 phono - Cary Rocket 88R - Audio Electronics Supply/Cary Six Pacs 12BZ7 RCA gray plates NOS: ------------------------- TO BUY 12BZ7 RCA NOS pairs
TO BUY 12BZ7 RCA CRYO
12BZ7 US brands used/good $6: ---------------------------- 2) RCA gray plates 1) Nat. Union branded CBS Columbia 1) CBS black plates
12C8 / 12CT8 8) 12C8 NOS $3 15) 12CT8 NOS $3
12D4 / 12DB5 / 12DM7 Dual Triode 2) 12D4 NOS $3 5) 12DB5 GE NOS $3 0) 12DM7 NOS (replacement for 12AX7)
12DT8 Dual Triode (similar to 12AT7) - Don Allen - Zenith L727 radio 1959 1) 12DT8 RCA black plates D getter halo NOS 1950's $25 1) 12DT8 Sylvania black plates NOS 1970 $25 1) 12DT8 RCA gray plates NOS around 1970 $20 (106/50 and 110/50) 1) 12DT8 RCA gray plates NOS around 1970 $15 (82/50 and 86/50) 1) 12DT8 Sylvania gray plates NOS rebranded Tungsol 1960's $20
12DQ6A/B=12GW6 3) 12DQ6 US Brands NOS $9 10) 12DQ6A US Brands NOS $9 18) 12DQ6B US Brands NOS $10.50 3) 12DQ6B used $5.25
12DW7=7247 Dual Triode TO BUY 12DW7=7247

12DQ7 / 12DZ6 1) 12DQ7 RCA NOS $6 2) 12DZ6=12EA6 $6
12E1 Tetrode / 12EG6 / 12EM6 1) 12E1=CV345 AEI England black plate bottom getter NOS brown base $25 1) 12E1=CV345 STC England gray plate side getter NOS brown base $25 5) 12EG6 NOS $5 6) 12EM6 NOS $4.50
12F5GT / 12FK6 / 12FM6 / 12FM8 6) 12F5GT NOS $3 0) 12FK6 1) 12FM6 CBS NOS D getter 1959 $10 1) 12FM6 RCA NOS D getter 1950's $10 1) 12FM6 GE branded RCA NOS D getter 1950's $10 1) 12FM6 Raytheon NOS D getter 1950's $10 1) 12FM6 Tungsol NOS large U getter $10 100) 12FM8 US Brands used/pullouts $1 each
12FQ7 Dual Triode (12FQ7 is a 6FQ7 with a 12V filament) - Quicksilver Audio V4 mono amp - Quicksilver M-135 amp single tubes: ------------ 1) 12FQ7 GE NOS mismatched triode sections by 25% $8 1) 12FQ7 Matsushita Japan used/good $4.50
12FQ8 / 12FR8 / 12FX8 100) 12FQ8 US Brands used/good, many are 1950's $3.95 0) 12FR8 NOS $12 2) 12FX5 NOS $4.50 2) 12FX8A GE NOS $3.50 1) 12GB3 NOS $6
12GN7A/12HG7 Pentode (12HG7=ruggedized frame-grid version of 12BY7A, uprated to 10 watts) TO BUY 12HG7=12GN7A
3) 12GN7A/12HG7 US brands used/low hours $4 (1) RCA 3) 12GN7A/12HG7 JAPAN used/test good $2.25 1) 12GN7A/12HG7 RCA clear top NOS $10 2) 12GW6=12DQ6B NOS $11
12H6 8) 12H6 NOS metal can $3.40
12J5/GT Triode - Transition Audio Design custom phono preamp 2010 metal can: --------- 2) 12J5 GE metal can NOS $5 ea glass: ----- 1 pair $25) 12J5GT RCA NOS 1970 1 pair $20) 12J5GT NOS same internals in white boxes 1940's - 1950's: 1 tube) Ken Rad 1 tube) Hytron made by Ken Rad 1 tube $12) VT-135=12J5GT RCA NOS 1940's 1 tube $12) VT-135=12J5GT Sylvania NOS 1940's 1 tube $12) 12J5GT Tungsol NOS 1940's 1 tube $10) 12J5GT RCA NOS 1970 1 tube $12) JAN-CNU-12J5GT Nat. Union Black Ribbed Plate NOS 1940's
12J7GT 5) 12J7GT NOS $5 each
12J8 / 12JB6/A / 12JN6 / 12JT6 3) 12J8 GE NOS $2.65 0) 12JB6 NOS $20 0) 12JB6A NOS $20 7) 12JN6 NOS $4.50 (5) GE (2) Dumont 2) 12JN8 Dumont NOS $3 4) 12JQ6 GE NOS $8 12) 12JT6A NOS $5.50
12K7GT / 12K8 / 12L6GT / 12Q7GT / 12R5 1) 12K7G Sylvania NOS $6 4) 12K7GT NOS $4 20) 12K8Y NOS $3 (5) RCA 20) 12L6GT US Brands NOS $3.25 1) 12Q7 metal NOS $4 1) 12Q7G National Union NOS $5 2) 12Q7G NOS $5 3) 12Q7GT US Brands NOS $4 5) 12R5 NOS $3 (5 for $12)
12S8 3) 12S8GT NOS $3
12SA7 metal can / 12SA7GT glass - Belmont Radio 6D120 1947 - GE 436 radio 1954 T0 BUY 12SA7
12SA7 metal: ----------- 1) 12SA7 GE metal used/60-65% $4 12SA7GT glass: ------------- 2) 12SA7GT National Union NOS no printing in white boxes 1940's $6 4) 12SA7GT used/good $4
12SC7 Dual-Triode (12SC7=12SL7GT in a metal can with common cathode for both triode sections) (also see 1634 which is a premium 12SC7 with matched sections) - Mapletree Ultra 4A preamp 2 pairs $20/pair) 12SC7 International Canada NOS, probably made by GE SINGLE TUBES: ------------ 1) 12SC7 Raytheon NOS 1950's $7.50 2) 12SC7 RCA NOS 1948 $7.50 (not a pair) 1) 12SC7 Ken Rad NOS 1940's $7.50
12SF5 / 12SF5GT / 12SF7 10) 12SF5 National Union NOS metal can $3.50 9) 12SF5GT US Brands NOS $5 (2) Nat. Union (4) Sylvania 9) 12SF7 US Brands NOS $5
12SG7 metal can 3) 12SG7 NOS $5 12) 12SG7 used $3
12SH7 metal can 2) 12SH7 NOS $5.50
12SJ7 metal can - Westinghouse radio - Silvertone amp 12SJ7 metal can NOS $4 ea or (4 for $14): (2) GE branded Executone (5) Sylvania (3) GE (5) United by RCA or GE (2) RCA
12SK7 metal / 12SK7GT glass Collins TCS14 1944 12SK7 metal can: --------------- 5 tubes $6.25 ea) JAN-CRC-12SK7 RCA NOS 1940's 1 tube $6.50) 12SK7 RCA metal NOS 1940 1 tube $6.50) 12SK7 GE metal NOS rebranded International 1 tube $4.25) 12SK7 Ken Rad metal used/good 1940's 1 tube $4.25) 12SK7 Raytheon used/good 1956 1 tube $4.25) JAN-CLRV-12SK7Y Marconi Canada 1959 used/good 12SK7GT glass: ------------- 1) 12SK7GT Tungsol used/tests like new 1940's, 50% of base is rusted/tarnished $3 (70/48) 1) 12SK7GT Triad by Sylvania chrome top used/70% 1950's $4 (60/48) 1) 12SK7GT Dumont NOS/70% original box around 1960 $4 (60/48) 1) 12SK7GT Hytron used/70% 1946 $4 (60/48)
12SL7GT=VT-289 Dual Triode - Tom McNally Darling amp 2009 TO BUY 12SL7GT
single tubes: ------------ 1) Sylvania 1970's $10 1) Sylvania branded GE NOS 1960's $12 1) Sylvania branded RCA NOS 1960's $12 1) Sylvania chrome top short bottle gray plates 1953 $15 1) Sylvania rebranded Tungsol 1951 with mismatched triode sections by 20-25% $8 12SL7GT US Brands NOS coin/wafer base: ------------------------------------- 2 pairs $25/pair) Sylvania coin-base NOS 1970's (best value) 12SL7GT USED: ------------ 1) 12SL7GT Sylvania chrome top used/tests 60% 1950's $3 1) 12SL7GT RCA used/tests very good mid-1940's $7.50
12SN7GT/A / 12SN7GTB Dual Triode (replace a 12SN7GT with a low noise 12SX7GT for improved sound) - Mapletree - McAlister Audio MA-10 - Tom Tutay preamp TO BUY 12SN7GT
CANADA: ------ 1) 12SN7GT Rogers Canada used/good 1957 original box $6 GE: -- 1 Low Noise tube $10) 12SN7GTA GE side getter NOS branded Amperex 1970, filament wire at top 1 tube $6 12SN7GTA GE side getter used/tests good 1956 RCA: --- 1) 12SN7GT RCA black base/black plates NOS 1950's white printing $15 1) 12SN7GTA RCA NOS 1950's rebranded Amperex in 1970 $12 US BRANDS USED: -------------- 10) 12SN7GTA US Brands used/test good $5 each or (10 for $25 used as-is)
12SQ7 metal can / 12SQ7GT glass Hallicrafters S-38 radio GE 422 radio 1951 GE 436 radio 1954 12SQ7 metal can: --------------- 1) 12SQ7 Tungsol metal NOS $10 3) 12SQ7 RCA metal NOS $10 ea 0) 12SQ7 metal used 12SQ7GT glass: ------------- 1) 12SQ7GT Hytron used/good 1950's $5 1) 12SQ7GT National Union used/good 1940's $5 1) 12SQ7GT RCA NOS 1950's broken guide pin $3.50
12SR7 metal can / 12SR7GT glass 6) 12SR7 metal can NOS $4 (2) RCA (2) Ken Rad (2) Mat. Union 6) JAN-CTL-12SR7GT Tungsol NOS 1940's $5 (4 for $18)
12SX7GT Dual Triode (upgrade your 12SN7 to these for improved sound) (Vplate=250V, Vgrid=-8V, Mu=20, Gm=2600, Rp=7700ohms, Iplate=9ma) (Max plate voltage=300V) - Mapletree Audio Line 2A SE 2007 - Mapletree Audio Line 2B - Mapletree Audio Ultra 4A SE preamp - Tube Research Dude preamp - Cavalli Liquid Glass 2013 TO BUY 12SX7GT

12T10 / 12U7 Dual Triode 3) 12T10 GE NOS $7 0) 12U7
12V6GT Pentode 8) 12V6GT NOS (6) GE $5.50 ($16/matched pair, 2 pairs) 1 pair $20) 12V6GT Tungsol NOS 1950's (recommended)
12W6GT 0) 12W6GT US Brands NOS 5) 12W6GT US Brands used/good $2.75 ea
12X4 Rectifier - Dynaco PAS-2, PAS-3 - Juicy Music Peach II pre-amp - car radios TO BUY 12X4

12Z3 13) 12Z3 NOS $3:SPECIAL 10 for $15 NOS as-is (2) Philco (5) RCA
for 13CW4 -> 35Z6 STOCK