Saturday, December 10th, 2016

Vacuum Tube

0


In today's economy it's crucial to get the most value for your money when shopping online. So there's no reason to overpay for Vacuum Tube when there are lots of them for sale on eBay. Plus, eBay is one of the largest and most trusted online shopping sites in the world. This site is authorized by eBay to help you find the Vacuum Tube you are looking for and show them to you. If you don't see what you're looking for below, use the search function on your right to find exactly what you need.

NOS MATCH PAIR GOLD PIN 12AU7 ECC82 5814  GETTER 3 MICA SYLVANIA 1950S TUBES
NOS MATCH PAIR GOLD PIN 12AU7 ECC82 5814 GETTER 3 MICA SYLVANIA 1950S TUBES
$187.49
FOIL D GETTER 12AX7 ECC83 HOLLAND AMPEREX TUBES MATCHED PAIR 1957 PRODUCTIONS
FOIL D GETTER 12AX7 ECC83 HOLLAND AMPEREX TUBES MATCHED PAIR 1957 PRODUCTIONS
$900.00
12 PIECES NOS NIB JAN 7984 BEAM POWER TUBES GENERAL ELECTRIC VINTAGE BLACK PLATE
12 PIECES NOS NIB JAN 7984 BEAM POWER TUBES GENERAL ELECTRIC VINTAGE BLACK PLATE
$112.49
Sonic Frontiers Power 2 vacuum tube power amplifier tubes have very low hours
Sonic Frontiers Power 2 vacuum tube power amplifier tubes have very low hours
$2,499.00
18 PIECES RCA AMPEREX SYLVANIA RAYTHEON 6146 6146A 6146B VINTAGE POWER TUBES USA
18 PIECES RCA AMPEREX SYLVANIA RAYTHEON 6146 6146A 6146B VINTAGE POWER TUBES USA
$299.99
Single Ended Triode Vacuum Tube Amplifiers Afterglow 2A3
Single Ended Triode Vacuum Tube Amplifiers Afterglow 2A3
$1,000.00
QUAD ULTRA LOW NOISE 12AT7WC 6201 ECC801S DUAL TRIODE TUBES GENERAL ELECTRIC
QUAD ULTRA LOW NOISE 12AT7WC 6201 ECC801S DUAL TRIODE TUBES GENERAL ELECTRIC
$82.49
CARBONIZED PLATES U FOIL GETTER GENERAL ELECTRIC 12AU7 ECC82 NOS PAIR TUBES
CARBONIZED PLATES U FOIL GETTER GENERAL ELECTRIC 12AU7 ECC82 NOS PAIR TUBES
$187.49
Sherwood Sax Design Vacuum Tube Monoblock Amplifiers Thermionic 200 8417
Sherwood Sax Design Vacuum Tube Monoblock Amplifiers Thermionic 200 8417
$3,995.00
6 PIECES RAYTHEON GIANT D GETTER 12AT7 ECC81 TUBES EXCELLENT SHAPE MATCHED RARE
6 PIECES RAYTHEON GIANT D GETTER 12AT7 ECC81 TUBES EXCELLENT SHAPE MATCHED RARE
$134.99
Melos TM 90ST II VACUUM TUBE AMPLIFIER
Melos TM 90ST II VACUUM TUBE AMPLIFIER
$950.00
RARE TALL BOTTLE 6SL7GT VT 229 SYLVANIA 1950S TUBES  EXCELLENT MATCHED PAIR
RARE TALL BOTTLE 6SL7GT VT 229 SYLVANIA 1950S TUBES EXCELLENT MATCHED PAIR
$150.00
5 PIECES NOS NIB EL84 6BQ5 TUBES SYLVANIA  RAYTHEON VINTAGE POWER TUBES NEW
5 PIECES NOS NIB EL84 6BQ5 TUBES SYLVANIA RAYTHEON VINTAGE POWER TUBES NEW
$134.99
RARE VINTAGE PIONEER SM 500 VACUUM TUBE STEREO AMPLIFIER SM 83 HI FI AMP WORKS
RARE VINTAGE PIONEER SM 500 VACUUM TUBE STEREO AMPLIFIER SM 83 HI FI AMP WORKS
$795.95
6 PIECES AUDIOPHILE TUBES TELEFUNKEN ECC85 6AQ8 VALVO GERMANY MADE PREMIUM
6 PIECES AUDIOPHILE TUBES TELEFUNKEN ECC85 6AQ8 VALVO GERMANY MADE PREMIUM
$292.49
Legend Starlet KT88 vacuum tube stereo integrated amplifier GORGEOUS CONDITION
Legend Starlet KT88 vacuum tube stereo integrated amplifier GORGEOUS CONDITION
$1,799.00
13 AMAZING VINTAGE TUNGSOL TUBES BLACK PLATES 1603 12AT7 6SN7 VT 107A 6V6GT
13 AMAZING VINTAGE TUNGSOL TUBES BLACK PLATES 1603 12AT7 6SN7 VT 107A 6V6GT
$375.00
Canary Audio C800 Vacuum Tube Line Stage Preamplifier 6SN7 Made in USA
Canary Audio C800 Vacuum Tube Line Stage Preamplifier 6SN7 Made in USA
$3,800.00
50 PIECES NOS RCA 1960 VINTAGE 5963 12AU7 ECC82 HIGH END AUDIO TUBES  AMAZING
50 PIECES NOS RCA 1960 VINTAGE 5963 12AU7 ECC82 HIGH END AUDIO TUBES AMAZING
$592.49
EF86 6267 MICROPHONE TUBE 10M MULLARD GOLD PIN  NOS NIB GREAT BRIT VERY RARE
EF86 6267 MICROPHONE TUBE 10M MULLARD GOLD PIN NOS NIB GREAT BRIT VERY RARE
$296.25
SONIC FRONTIERS LINE 1 VACUUM TUBE STEREO PRE AMPLIFIER REMOTE + BOX + ETC
SONIC FRONTIERS LINE 1 VACUUM TUBE STEREO PRE AMPLIFIER REMOTE + BOX + ETC
$1,775.00
Conrad Johnson Premier 16LS Series II Vacuum Tube Pre Amp Audible Elegance
Conrad Johnson Premier 16LS Series II Vacuum Tube Pre Amp Audible Elegance
$3,495.00
MINT CONDITION AMPEREX 4 250A TUBE EUROPE MADE VINTAGE NEW EXCELLENT 4250A 4 250
MINT CONDITION AMPEREX 4 250A TUBE EUROPE MADE VINTAGE NEW EXCELLENT 4250A 4 250
$187.49
Nobsound Audio Mini 6J9 Vacuum Tube Headphone Amplifier Stereo HiFi Earphone Amp
Nobsound Audio Mini 6J9 Vacuum Tube Headphone Amplifier Stereo HiFi Earphone Amp
$39.99
Cayin Vacuum Tube Integrated Amplifier A 88T
Cayin Vacuum Tube Integrated Amplifier A 88T
$2,800.00
10 PIECES NOS NIB 5Y3GT 5Y3 5Y3G GENERAL ELECTRIC SYLVANIA RCA USA MADE NEW
10 PIECES NOS NIB 5Y3GT 5Y3 5Y3G GENERAL ELECTRIC SYLVANIA RCA USA MADE NEW
$202.49
1 Carver C 19 vacuum Tube referance Preamp preamplifier pre amplifier ONLY
1 Carver C 19 vacuum Tube referance Preamp preamplifier pre amplifier ONLY
$1,500.00
Audio Nirvana 6V6 Ultralinear Vacuum Tube Amplifier
Audio Nirvana 6V6 Ultralinear Vacuum Tube Amplifier
$1,050.00
MUSICAL FIDELITY VACUUM TUBE OUTPUT BUFFER X 10 V3
MUSICAL FIDELITY VACUUM TUBE OUTPUT BUFFER X 10 V3
$220.00
Raysonic CD 138 Vacuum Tube CD Player
Raysonic CD 138 Vacuum Tube CD Player
$950.00
Nobsound MS 10D MKII Bluetooth Vacuum Tube Headphone Amplifier USB Audio HiFi US
Nobsound MS 10D MKII Bluetooth Vacuum Tube Headphone Amplifier USB Audio HiFi US
$165.00
Custom Packing For Your Marantz Model 8B Vacuum Tube Stereo Amplifier
Custom Packing For Your Marantz Model 8B Vacuum Tube Stereo Amplifier
$75.00
ELLA 6550 KT88 Vacuum Tube Integrated Stereo Amplifier
ELLA 6550 KT88 Vacuum Tube Integrated Stereo Amplifier
$900.00
Rhino VA 1 Vacuum tube headphone amplifier
Rhino VA 1 Vacuum tube headphone amplifier
$399.00
Avalon VT 747SP Stereo Class A Vacuum Tube EQ Compressor Black New VT747SP
Avalon VT 747SP Stereo Class A Vacuum Tube EQ Compressor Black New VT747SP
$2,595.00
4x NEW Mullard EL34 Reissue XF2 Vacuum Tubes Matched Quad TESTED
4x NEW Mullard EL34 Reissue XF2 Vacuum Tubes Matched Quad TESTED
$75.35
Conrad Johnson ET3 Vacuum Tube Line Stage Preamplifier with Remote
Conrad Johnson ET3 Vacuum Tube Line Stage Preamplifier with Remote
$2,950.00
HiFi Pure SEPP Vacuum Tube Headphone Amplifier Hi End Audio Stereo Preamplifier
HiFi Pure SEPP Vacuum Tube Headphone Amplifier Hi End Audio Stereo Preamplifier
$139.00
Audio Nirvana 300B Single Ended Triode Vacuum Tube Amplifier
Audio Nirvana 300B Single Ended Triode Vacuum Tube Amplifier
$1,595.00
Nobsound 6J9 Vacuum Tube Integrated Amplifier Mini Audio HiFi Stereo Headphone
Nobsound 6J9 Vacuum Tube Integrated Amplifier Mini Audio HiFi Stereo Headphone
$69.23
Nobsound 6N2 Vacuum Tube Phono Pre Amplifier MM Turntables RIAA Stereo Preamp
Nobsound 6N2 Vacuum Tube Phono Pre Amplifier MM Turntables RIAA Stereo Preamp
$179.00
Audio Research Reference 600 Monoblock Vacuum Tube Amplifiers World Class
Audio Research Reference 600 Monoblock Vacuum Tube Amplifiers World Class
$9,999.00
Cayin iDAC 1 Hi Fi Vacuum Tubes USB Audio DAC
Cayin iDAC 1 Hi Fi Vacuum Tubes USB Audio DAC
$399.00
MCINTOSH LABS C1000 REFERENCE STEREO VACUUM TUBE PREAMPLIFIER BEAUTIFUL
MCINTOSH LABS C1000 REFERENCE STEREO VACUUM TUBE PREAMPLIFIER BEAUTIFUL
$18,000.00
Vacuum Tube Stereo Amplifier The Time Travelers Amp Bluetooth Victorian Style
Vacuum Tube Stereo Amplifier The Time Travelers Amp Bluetooth Victorian Style
$1,889.00
HIFIMAN EF2C Vacuum Tube Headphone Amplifier
HIFIMAN EF2C Vacuum Tube Headphone Amplifier
$202.51
Douk Audio Mini Stereo Vacuum Tube Amp Headphone Amplifier HiFi Pre Amplifier US
Douk Audio Mini Stereo Vacuum Tube Amp Headphone Amplifier HiFi Pre Amplifier US
$55.00
Triode vacuum tube stereo Integrated Amplifier TRIODE RUBY
Triode vacuum tube stereo Integrated Amplifier TRIODE RUBY
$883.00
conrad johnson Classic 2 Vacuum Tube Line Stage Preamplifier
conrad johnson Classic 2 Vacuum Tube Line Stage Preamplifier
$2,381.35
Meixing Mingda MC368 B Vacuum Tube Amplifier KT88 2013 Version Brand New
Meixing Mingda MC368 B Vacuum Tube Amplifier KT88 2013 Version Brand New
$999.00
Audio Research Reference Phono 2 Vacuum Tube Phono Preamplifier
Audio Research Reference Phono 2 Vacuum Tube Phono Preamplifier
$6,000.00
Nobsound Hybrid Headphone Amp Mini Stereo Vacuum Tube Amplifier HiFi Pre Amp US
Nobsound Hybrid Headphone Amp Mini Stereo Vacuum Tube Amplifier HiFi Pre Amp US
$46.00
YAQIN MS 110B 54W KT88 12AU7 12AT7 Vacuum Tube Integrated Amplifier
YAQIN MS 110B 54W KT88 12AU7 12AT7 Vacuum Tube Integrated Amplifier
$939.99
FOSTEX HP V1 Portable Vacuum Tube Headphone Amplifier Z9
FOSTEX HP V1 Portable Vacuum Tube Headphone Amplifier Z9
$224.99
DC12V Audio Mini 6J1 Valve  Vacuum Tube Pre Amplifier Stereo HiFi Buffer Preamp
DC12V Audio Mini 6J1 Valve Vacuum Tube Pre Amplifier Stereo HiFi Buffer Preamp
$30.39
VTL VACUUM TUBE LOGIC
VTL VACUUM TUBE LOGIC
$3,600.00
Nobsound Super Mini Vacuum Tube Headphone Amplifier Stereo HiFi Earphone Pre Amp
Nobsound Super Mini Vacuum Tube Headphone Amplifier Stereo HiFi Earphone Pre Amp
$49.00
Jolida JD1000P 2 channel vacuum tube amplifier from authorized dealer
Jolida JD1000P 2 channel vacuum tube amplifier from authorized dealer
$2,248.95
Presonus Vacuum Tube Studio Channel Strip Pre Amp Compressor Equalizer
Presonus Vacuum Tube Studio Channel Strip Pre Amp Compressor Equalizer
$180.00
LineP A937 Preamp Amplifier Classic 6J1 Valve  Vacuum Tube Stereo HiFi Buffer
LineP A937 Preamp Amplifier Classic 6J1 Valve Vacuum Tube Stereo HiFi Buffer
$58.96
VTL Vacuum Tube High Resolution Line Preamplifier
VTL Vacuum Tube High Resolution Line Preamplifier
$1,998.00
Nobsound NS 08E Vacuum Tube Integrated Amplifier Mini Audio HiFi Stereo Headp
Nobsound NS 08E Vacuum Tube Integrated Amplifier Mini Audio HiFi Stereo Headp
$61.50
Triode Trv 88se Vacuum Tube Integrated Amplifier
Triode Trv 88se Vacuum Tube Integrated Amplifier
$2,018.00
XiangSheng 728A BK Vacuum Tube Pre Amplifier Preamp Shigeru Wada Japan circuit U
XiangSheng 728A BK Vacuum Tube Pre Amplifier Preamp Shigeru Wada Japan circuit U
$350.00
Nobsound 6N2 Vacuum Tube Phono Pre Amplifier MM Turntable RIAA HiFi Preamp New
Nobsound 6N2 Vacuum Tube Phono Pre Amplifier MM Turntable RIAA HiFi Preamp New
$179.00
TRIODE Japan Vacuum Tube Pre main Amp Amplifier TRK 300 KIT Japanese Limited NEW
TRIODE Japan Vacuum Tube Pre main Amp Amplifier TRK 300 KIT Japanese Limited NEW
$2,470.00
RARE VINTAGE PIONEER SM 500 VACUUM TUBE STEREO AMPLIFIER SM 83 HI FI AMP
RARE VINTAGE PIONEER SM 500 VACUUM TUBE STEREO AMPLIFIER SM 83 HI FI AMP
$275.00
Manley Reference Series Preamplifier Valve Vacuum Tube
Manley Reference Series Preamplifier Valve Vacuum Tube
$3,388.46
RAPHAELITE DS6V 6V6 Vacuum Tube Integrated Amplifier Class A New US 120V
RAPHAELITE DS6V 6V6 Vacuum Tube Integrated Amplifier Class A New US 120V
$649.00
Original Dared I30 I 30 HIFI Class A Vacuum Tube Integrated Amplifier 6L6G12AX7
Original Dared I30 I 30 HIFI Class A Vacuum Tube Integrated Amplifier 6L6G12AX7
$1,299.99
Little Dot MK III Vacuum Tube Headphone Amplifier MK3 Stereo Amp HiFi Preamp
Little Dot MK III Vacuum Tube Headphone Amplifier MK3 Stereo Amp HiFi Preamp
$339.00
New TRIODE TRV 88SER VACUUM TUBE INTEGRATED AMPLIFIER from JAPAN
New TRIODE TRV 88SER VACUUM TUBE INTEGRATED AMPLIFIER from JAPAN
$1,937.99
SainSonic 6J5 Class A Vacuum Tube Buffer Classic 47 Headphone Amplifier Decode
SainSonic 6J5 Class A Vacuum Tube Buffer Classic 47 Headphone Amplifier Decode
$44.69
PAIR ULTRA LOW NOISE 12AT7WC 6201 ECC801S DUAL TRIODE TUBES GENERAL ELECTRIC
PAIR ULTRA LOW NOISE 12AT7WC 6201 ECC801S DUAL TRIODE TUBES GENERAL ELECTRIC
$59.99
Bewitch 6550 x 4 KT88 Vacuum Valve Tube Hi end Integrated Amplifier 230v 240v U
Bewitch 6550 x 4 KT88 Vacuum Valve Tube Hi end Integrated Amplifier 230v 240v U
$893.80
Nobsound 6J9 Vacuum Tube Integrated Amplifier Mini Audio HiFi Stereo Headphone
Nobsound 6J9 Vacuum Tube Integrated Amplifier Mini Audio HiFi Stereo Headphone
$74.50
TANGO FW 150 10SR Vacuum Tube Amp Amplifier Japan Used Excellent++ Sound Music
TANGO FW 150 10SR Vacuum Tube Amp Amplifier Japan Used Excellent++ Sound Music
$5,270.00
Douk Audio 5899 Vacuum Tube Headphone Amplifier Portable HiFi Rechargeable Amp
Douk Audio 5899 Vacuum Tube Headphone Amplifier Portable HiFi Rechargeable Amp
$59.95
Little Bear B4 Portable Vacuum  Valve Tube Headphone Amplifier HiFi for Phone
Little Bear B4 Portable Vacuum Valve Tube Headphone Amplifier HiFi for Phone
$86.67
6N3 Vacuum Tube PreAmplifier SRPP Board Assembled Fit for 5670
6N3 Vacuum Tube PreAmplifier SRPP Board Assembled Fit for 5670
$17.94
XiangSheng Music Curve D 2020 KT100 push pull vacuum tube Integrated Amplifier
XiangSheng Music Curve D 2020 KT100 push pull vacuum tube Integrated Amplifier
$799.00
Little Bear B1 Portable Rechargable Vacuum Tube Headphone Amplifier HiFi Amp
Little Bear B1 Portable Rechargable Vacuum Tube Headphone Amplifier HiFi Amp
$58.00
New TRIODE vacuum tube CD player Dark Red TRV CD5SE from JAPAN
New TRIODE vacuum tube CD player Dark Red TRV CD5SE from JAPAN
$1,852.49
YAQIN MS 6CA7 EL34 x 4 Vacuum Valve Tube Hi end Integrated Amplifier 110v 240v
YAQIN MS 6CA7 EL34 x 4 Vacuum Valve Tube Hi end Integrated Amplifier 110v 240v
$831.00
Vintage stereo vacuum tube preamplifier HIFI 12AX7 preampbrand new
Vintage stereo vacuum tube preamplifier HIFI 12AX7 preampbrand new
$409.50
YAQIN MS 110B KT88 x4 Vacuum Tube Hi end Integrated Power Amplifier 110v 240v CA
YAQIN MS 110B KT88 x4 Vacuum Tube Hi end Integrated Power Amplifier 110v 240v CA
$943.70
Music Angel YAYI PAIR KT88 x4 Mono Block Vacuum Tube Integrated Power Amplifier
Music Angel YAYI PAIR KT88 x4 Mono Block Vacuum Tube Integrated Power Amplifier
$699.00
Vacuum Tube PreAmplifier Update Version Brand New XiangSheng Improved 728A
Vacuum Tube PreAmplifier Update Version Brand New XiangSheng Improved 728A
$289.00
YAQIN MS 6CA7 EL34 Vacuum Valve Tube Hi end Integrated Amplifier 110v 240v CA
YAQIN MS 6CA7 EL34 Vacuum Valve Tube Hi end Integrated Amplifier 110v 240v CA
$855.99
Music Angel XDSE KT88 x4 Class A Valve Vacuum Tube Hi end Integrated Amplifier
Music Angel XDSE KT88 x4 Class A Valve Vacuum Tube Hi end Integrated Amplifier
$730.00
LUXMAN JAPAN VACUUM TUBE STEREO POWER AMPLIFIER Amp CL 38u CL38U Sound Music
LUXMAN JAPAN VACUUM TUBE STEREO POWER AMPLIFIER Amp CL 38u CL38U Sound Music
$4,270.00
Nobsound NS 08E Vacuum Tube Integrated Amplifier Mini Audio HiFi Stereo Headp
Nobsound NS 08E Vacuum Tube Integrated Amplifier Mini Audio HiFi Stereo Headp
$61.50
KT88EL34 Vacuum Tube Integrated Amplifier Stereo HiFi 20 Headphone Power Amp
KT88EL34 Vacuum Tube Integrated Amplifier Stereo HiFi 20 Headphone Power Amp
$1,490.00
Douk Audio 6P14 Vacuum Tube Amplifier Single Ended Class A Stereo Amp DIY Kit
Douk Audio 6P14 Vacuum Tube Amplifier Single Ended Class A Stereo Amp DIY Kit
$139.00
STAX vacuum tube driver unit SRM 007tA JAPAN EMS
STAX vacuum tube driver unit SRM 007tA JAPAN EMS
$1,375.00
YAQIN MC 13S 40WPC EL34 6CA7 Vacuum Tube Push Pull Integrated Amplifier
YAQIN MC 13S 40WPC EL34 6CA7 Vacuum Tube Push Pull Integrated Amplifier
$709.99

Vacuum Tube items recently purchased through this site:

LUXMAN JAPAN VACUUM TUBE STEREO POWER AMPLIFIER Amp CL 38u CL38U Sound Music, TANGO FW 150 10SR Vacuum Tube Amp Amplifier Japan Used Excellent++ Sound Music, TRIODE Japan Vacuum tube CD player Dark Red TRV CD5SE for Sound Music, Triode Japan Vintage Stereo Power Vacuum Tube Amplifier Amp Main TRV 35SE TR1, TRIODE Japan Vacuum Tube Pre main Amp Amplifier TRK 300 KIT Japanese Limited NEW, Presonus Vacuum Tube Studio Channel Strip Pre Amp Compressor Equalizer, Cayin iDAC 1 Hi Fi Vacuum Tubes USB Audio DAC, Sonic Frontiers Power 2 vacuum tube power amplifier tubes have very low hours, LUXMAN VACUUM TUBE CONTROL AMPLIFIER CL 38uL JP 90th Anniversary Model Limited, NEW LIMITED LUXMAN VACUUM TUBE STEREO POWER AMPLIFIER MQ 88uL, Stax Headphone Amp SRM T1 Driver Unit for Earspeakers with Vacuum Tube Output, Little bear P2 1 GOLD HiFi Vacuum valve tube headphone amplifier amp preamp at, CARVER Vacuum Tube Reference Compact Disc Player SD A 490t, Bellari VP 130 Vacuum Tube Phono Stage Preamplifier 12AX7 Made in USA, Little Dot I+ Vacuum Transistor Hybrid Tube Headphone Amplifier HiFi Amp E5G6, Little Dot I+ Vacuum Transistor Hybrid Tube Headphone Amplifier HiFi Amp K6V1, GEC KT88 Vacuum Tube boxes x 7 Power Amplifier Valves cartons only UK made, AUDIO RESEARCH 6550 Vacuum Power Tubes x 3 Power Amplifier Thermonic Valves, musica Raicho L MONO Grouse Vacuum Tube Amplifier Body N1745176, musica Raicho L momo Grouse Vacuum Tube Amplifier Body N1752168, Single Ended Triode Vacuum Tube Amplifiers Afterglow 2A3, MUSICAL FIDELITY VACUUM TUBE OUTPUT BUFFER X 10 V3, New Carot One USB DAC built in vacuum tube pre main amplifier ERNESTOLONE EX, LUXMAN JAPAN VACUUM TUBE STEREO POWER AMPLIFIER Amp MQ 88uL MQ88u Sound Music, Electronintorg GM 70 GammaM 70 Vacuum Tube 2 pairs S1887276, HiFi Stereo Headphone 6J9 Vacuum Tube Integrated Amplifier Mini Audio Earset Amp, Electronintorg GM 70 GammaM 70 Vacuum Tube 2 pairs S1887272, FOSTEX HP V1 Portable vacuum tube Headphone Amplifier, RARE VINTAGE PIONEER SM 500 VACUUM TUBE STEREO AMPLIFIER SM 83 HI FI AMP, KORG Nutube 6P1 vacuum tube on chip twin triode from Japan,

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