• AC12V 6J1 Valve Pre-amp Tube Board Headphone Amplifier+Acrylic Case DIY Kits

    $3.56 to $9.69
    Top Rated Plus
    $2.35 shipping
    From China
    438 sold
    Brand: UnbrandedType: Tube Pre-Amp
  • E834 RIAA MM Tube phono amplifier kit Turntable preamp Base on EAR834 Circuit

    DIY E834 Tube MM phono stage amplifier kit base on EAR834 Circuit (without Tube) This edition is base on UK EAR834 (MM amplification part) design, dual independent channel, one point ground, no noise at the end. This version is MM-RIAA amplifier Gain: 1KHZ @ 48DB Each PCB Size: 100*150*1.6MM (1OZ copper, FR4 grade A PCB material) works voltage:0-260VDC above 10ma (260V-280V is ok) 0-260VDC above 10ma (260V-280V is ok) ( also can share same one Group 260V high voltage. the Current recommned above 20ma) Filament voltage: 0-12.6VDC above 0.8A Tube model: 3pcs 12AX7 ( note: the default price is not include this tubes) Note: this is a DIY kit. all the Components will need yourself to solder it.
    $26.95
    Top Rated Plus
    $2.93 shipping
    From Hong Kong
    or Best Offer
    Brand: Unbranded
    41 sold
    Type: Tube Amplifier
  • HiFi Stereo Vacuum Tube Pre-Amp Preamplifier Diy Kit base on Mclntosh C22 Preamp

    Note: This is a DIY kit, all the parts need solder by yourself. Kits not include 3pcs tubes. Mclntosh C22 tube preamp, dynamic very sharp, a few gallbladder in front of a dynamic stone works. The board reference Mclntosh C22 circuit, designed with dual single stand-alone design, physically left and right channels 100% separation, independent grading ground. PCB size: 100 * 150 * 1.6MM, spray tin process Materials used: Taiwan production of colored metal ring resistors 1% accuracy MKP coupling capacitor Ceramic tube seat Input voltage: DC-280V two groups, each group is not less than 10MA DC12.6V one group, not less than 0.8A (for filament) Recommend the use of electronic tube: 12AX7 and its compatible tube (excluding Tubes).
    $16.79
    Top Rated Plus
    $3.55 shipping
    From Hong Kong
    or Best Offer
    Brand: Unbranded
    70 sold
    Type: Tube Pre-Amp
  • Famous circuit 12AU7 12AX7 Tube preamplifier KIT DIY preamp

    This kit is a transistor resistor pcb parts kit! 12AX7 / 2 个, 6dj8 / 1 个 (bile and power cattle are not included in the price of this product). This product is for electronic technology and testing capabilities of users to buy.
    $66.50
    From China
    Was: Previous Price$70.00
    Brand: Unbranded
    $2.39 shipping
    65 watching
  • Low Distortion Tube Preamplifier Preamp Board DIY Kit fit for 12AX7 / 21AU7 Tube

    Note: This is DIY Kits, Need welding its by yourself! Not included 12AX7 / 21AU7 Tube! Power Supply: DC 180-300V DC 12V Using double-sided immersion gold processes Taiwan produced copper foot precision metal film resistors! Siemens high-voltage filter capacitor! Ceramic Gold-plated tube socket to ensure contact reliability! The circuit has a noise inaudible! The tube preamp circuit, because of its second harmonic distortion appropriate, connected to the power amplifier board with more bile performance! Sound performance rounded.
    $12.17
    Top Rated Plus
    Free shipping
    From China
    or Best Offer
    Brand: UnbrandedType: Tube Pre-Amp
  • 6Z4+12AX7 Tube Preamplifier Preamp Board KIT base on Marantz 7 classical circuit

    6Z4 12AU7 12AX7 Tube preamplifier board Reference Marantz 7 classical circuit DIY HIFI Kits This is DIY KIT, you need to solder it by yourself. Without 12AU7*2 12AX7*2 Tubes , please Note. Parameters: PCB Size: 155mmx121mm Features: * Imitated from the famous Marantz 7 (Marantz) classic circuit. * PCB is double-sided gold plated, resistance Beijing 718 is coupled to Germany Siemens or ERO * Three Main 4 tubes can use 12AU7*4/ 12AX7*4/ 12AU7*2 12AX7*2 / Russian EH series (Not contain 4pcs main tubes) . * High voltage part with 6Z4*2 tube rectifier. * Gold plated tube holder * Transformer requirements AC 240V--0 6V--0 12V--0 (high voltage range can be 200-260V).
    $28.89
    Top Rated Plus
    Free shipping
    From Hong Kong
    or Best Offer
    Brand: Unbranded
    45 watching
    Type: Tube Pre-Amp
  • Low Noise Stereo Tube Preamplifier Preamp Board DIY Kit for 12AX7 / 21AU7 Tube

    Note: This is DIY Kits, Need welding its by yourself! Not included 12AX7 / 21AU7 Tube! Power Supply: DC 180-300V DC 12V Using double-sided immersion gold processes Taiwan produced copper foot precision metal film resistors! Siemens high-voltage filter capacitor! Ceramic Gold-plated tube socket to ensure contact reliability! The circuit has a noise inaudible! The tube preamp circuit, because of its second harmonic distortion appropriate, connected to the power amplifier board with more bile performance! Sound performance rounded.
    $12.26
    Top Rated Plus
    Free shipping
    From Hong Kong
    or Best Offer
    Brand: Unbranded
    69 sold
    Type: Tube Pre-Amp
  • NEW D.Klimo MERLINO 6DJ8 ECC88 CCA Tube Preamplifier Preamp DIY Kit 1:1 Replica

    $43.71 to $88.35
    From China
    Was: Previous Price$95.00
    Type: Tube Pre-Amp
    Free shipping
    9 watching
  • Hifi Stereo Tube Preamp kit base on C22 preamplifier + HV Filament Power Supply

    PRT-03A Hifi Stereo Tube preamp kit (base on the famous C22 preamplifier) HV Power supply kit (The link is for DIY kit. all the parts will need youself to solder it) Sound features: dynamic sharp / low frequency with elasticity / sound field width / three fields are balanced. Preamp board Works voltage: DC280V (above 10ma ) X 2 groups and DC12.6V ( above 0.8A) Power supply board input voltage: 0-AC220V X 2 (200V-240V are ok) 0-AC12V X 1 (12-15V are ok) Preamp PCB Size: 150*100*1.6MM PSU PCB Size: 130*70*1.6MM Taiwan metal film resistance 1% accuracy MKP coupling capacitor Ceramic tube socket. This board can using 3pcs 12AX7 or some other same type tubes (12AXX series are all ok).
    $33.56
    Top Rated Plus
    $6.50 shipping
    From Hong Kong
    or Best Offer
    Brand: UnbrandedType: Tube Pre-Amp
  • DIY Hifi 12AU7+12AX7 Tube preamplifier board / stereo Tube preamp kit L13-1

    $26.00 to $31.00
    From China
    $7.00 shipping
    Brand: Unbranded
  • E834 MM RIAA Turntables Preamp EAR834 12AX7 Tube Phono Stage Amplifier DIY Kit

    2018 Ver RIAA MM Tube phono stage amplifier kit -------base on UK EAR834 (MM amplification part) design This version has Optimized layout. also has integrated the Power supply circuit, it is more easy to built a hi-end phono stage amplifier. PCB Size: 205*153*1.6MM (1OZ copper, Gold plated FR4 grade A PCB material) Works voltage: High voltage 0-AC260V >16mA Filament 0-AC14V >1A Tube model: 3pcs 12AX7 ( note: the default price is not include this tubes) Two independent channel, one point ground, no noise at the end. This version is MM-RIAA amplifier Gain: 1KHZ @ 48DB Note: this is a DIY kit. all the Components will need yourself to solder it. We can provide the BOM and schematic via email.
    $58.58
    Top Rated Plus
    $7.00 shipping
    From Hong Kong
    or Best Offer
    Brand: Unbranded
    16 watching
    Type: Tube Amplifier
  • Douk Audio 12AX7 Vacuum Tube Preamp HiFi Stereo Pre-Amplifier DIY KIT Marantz M7

    Nobsound®——Douk Audio. HiFi Art-Elfidelity. Latest Tube Pre-AMP amplifier DIY KIT for Audio Hifi 6Z5P 12AX7B Ref Marantz 7. Hi-Fi Tube Amplifier. Integrated Amplifier. Digital Amplifier. Audio HiFi & DIY.
    $141.54
    From China
    Was: Previous Price$148.99
    Type: Tube Amplifier
    Free shipping
    118 watching
  • Hifi Preamp 12AX7 Vacuum tube preamplifier bare PCB Base on Marantz7(M7) circuit

    $8.88 to $31.55
    Top Rated Plus
    Free shipping
    From ChinaBrand: Unbranded
  • GE 5670 / 6N3 *2 Tube Preamplifier Board kit base on MATISSE Preamp Circuit DIY

    6N3/5670 Tube preamplifier board Reference Matisse preamp circuit DIY HIFI Kits This is DIY KIT, you need to solder it by yourself. with Taiwan potentiometer and 6N3 *2 Tubes , please Note. Parameters: PCB Size: 132mmx99mm Features: * The new 6N3 tube * 2, can be replaced with the US 5670. * Potentiometer compatible with ALPS16 and ALPS27 potentiometers (default Taiwan potentiometer) * Coupling is the new WIMA and Swedish EVOX * Resistance is the United States DALE * Filament voltage is LM317 regulator into 6V. * Gold plated tube holder * The main capacitor is disassembled BC 1500UF * 10 times the circuit amplification, you can reduce the value of 22K * Transformer requirements 60VX1 9VX1 (with error), 60V current 100MA-200MA can, 8v.
    $28.68
    Top Rated Plus
    Free shipping
    From Hong Kong
    or Best Offer
    Brand: Unbranded
    7 watching
    Type: Tube Pre-AmpColor: Blue
  • Stereo Class A SRPP 6N5P Vacuum Tube Headphone Amplifier Kit DIY Hifi Preamp

    This is DIY KIT,you need to solder it by yourself, no potentiometers and tubes. (if you need, pls contact me.) Single-ended amplifier has a very strong sense of music, output resistance is also lower than other circuits, can drive headphones in the range of 32-600ohm. The sense of control and the extension are better than the stone machine. Because the filament and the high pressure in the setting are both DC stabilized, the signal-to-noise ratio is very high, which is more tranquil than ordinary stone machines. Power supply : AC 140V AC 6V.
    $27.99
    Top Rated Plus
    Free shipping
    From Hong Kong
    or Best Offer
    Brand: Unbranded
    53 watching
    Type: Headphone Amplifier
  • EAR834 MM Turntable Vinyl PHONO-R Preamp HiFi Tube Pre-amp DIY Kit

    HiFi Art-Elfidelity. Phono Pre-Amplifier. Phono diy KIT (PCB resistance transistor) For HIFI. Audio HiFi & DIY. This board need you have electronic technology and detectability,it's special designed for Hi-End HiFi Audiophile.
    $52.25
    From China
    Was: Previous Price$55.00
    Type: Tube Pre-Amp
    Free shipping
    96 sold
  • Douk Audio MM Turntable Vinyl PHONO-R Preamp HiFi Tube Pre-amp DIY Kit

    Other people diy picture. (Using the tube type 12ax7 three).
    $57.00
    From China
    Was: Previous Price$60.00
    Brand: Unbranded
    $2.39 shipping
    Type: Tube Pre-Amp
    55 watching
  • D.Klimo LAR Gold Plus MM MC Tube Phono Preamplifier Turntable Preamp DIY Kit

    $73.47 to $237.15
    From China
    Was: Previous Price$79.00
    Type: Tube Pre-Amp
    Free shipping
    Color: Gold
  • Famous circuit Audio K M7 Tube preamplifier DIY KIT preamp best sound

    Koa optical for the kondo (audionote) M7 original machine using resistors. The use of the tube model. 6x4 / ez90 a 12ay7 / 6072wa4. AC6.3V2A 12.6V3A 230-0-230V100MA. diy kit,picture is soldering, Contains all parts of the main image.
    $83.60
    From China
    Was: Previous Price$88.00
    Brand: Unbranded
    $2.39 shipping
  • Famous circuit 6SN7 Tube preamplifier DIY KIT refer Cary preamp best sound

    Note:picture is finish product,this product is diy kit. Resistance for the Japanese koa optical Dani United States irc.
    $114.00
    From China
    Was: Previous Price$120.00
    Brand: Unbranded
    $2.39 shipping
  • (DIY kit) PRT05A Hifi Tube Preamp Board base on conrad-johnson CL Circuit

    Note: this is a kit, need yourself to soder all the components. Not contain tubes. The PRT05A refers to the Conrad-johnson CL circuit. The design uses a dual-single-independent design. It physically separates 100% of the left and right channels and is grounded independently. PCB size: 144*178*1.6MM, spray tin process Recommend works voltage: High voltage: 0-AC220V 0-AC220V (above 10MA) Filament voltage: 0-AC6.3V (above 1A ) 0-AC6.3V (above 1A ) The High voltage AC200V-250V is ok , Filament voltage (AC6V-7V is ok) Note: the default price is not include the tubes. This board can works with following tubes: 12AX7、12AU7、12AT7.
    $38.95
    Top Rated Plus
    $7.00 shipping
    From Hong Kong
    or Best Offer
    Brand: Unbranded
    44 watching
    Type: Tube Pre-Amp
  • 12AX7 Stereo Tube Preamplifier kit base on Marantz 7(M7) Preamp+ HV Power Supply

    PRT-07A Hifi Stereo Tube preamp kit (base on the famous Marantz 7 preamplifier) HV Power supply kit (The link is for DIY kit. all the parts will need youself to solder it) Designed with dual independent design, physical left and right channels 100% separation, independent grading ground. Preamp board Works voltage: DC280V (above 10ma ) X 2 groups and DC12.6V ( above 0.8A) Power supply board input voltage: 0-AC220V X 2 (200V-240V are ok) 0-AC12V X 1 (12-15V are ok) Preamp PCB Size: 154*77*1.6MM PSU PCB Size: 130*70*1.6MM Taiwan metal film resistance 1% accuracy MKP coupling capacitor Ceramic tube socket. This board can using 3pcs 12AX7 or some other same type tubes (12AXX series are all ok).
    $34.55
    Top Rated Plus
    $5.80 shipping
    From Hong Kong
    or Best Offer
    Brand: Unbranded
  • (DIY kit) PRT-07B 12AX7 Hifi Tube Pre-Amp Board base on Marantz M7 Preamplifier

    This is DIY Kit, not assembled. Not contain Tubes. We can provide the PDF schematic. PRT-07B preamp is reference the famous Marantz M7 preamp Circuit , The sound quality is mellow, the medium frequency is sweet and natural. tube tastes very strong. PCB size: 152*177*1.6MM FR4 Works voltage: 200-220V AC >=15mA , 12-14V AC >=0.8A This preamp are using 3pcs 12AX7 Tubes. (note the kit defalut are not include the tubes) Gain: about 11 times.
    $27.70
    Top Rated Plus
    $6.00 shipping
    From Hong Kong
    or Best Offer
    Brand: Unbranded
    9 watching
    Type: Tube Pre-Amp
  • Douk Audio Luxury Tube Pre-Amplifier HiFi Preamp Line and Phono AMP DIY Kit

    Nobsound®——Douk Audio. HiFi Art-Elfidelity. Phono Pre-Amplifier. Hi-Fi Tube Amplifier. Integrated Amplifier. Digital Amplifier. Audio HiFi & DIY. Headphone Amplifier.
    $90.25
    From China
    Was: Previous Price$95.00
    Type: Tube Amplifier
    $12.00 shipping
    28 sold
  • (DIY kit) MM RIAA Turntable preamp Ear834 12AX7 Tube Phono Amplifier full kit

    Shuguang 12AX7 tubes X 3pcs. this is only a MM Phono Amplifier. can not connect with MC Phono. also can not be used as a Ordinary preamp to use it. Phono Amplifier kit X 1. Phono Amplifier kit photo.
    $160.00
    From China
    $48.00 shipping
    Type: Tube Amplifier
    88 watching
  • DIY Hifi 6j4+ 6p6p Tube Preamplifier Kit Vacuum Tube Preamp Kit

    This is a DIY kit, all the parts need yourself to solder.
    $108.00
    From China
    $32.00 shipping
    Brand: Unbranded
    15 watching
    Type: Tube Pre-Amp
  • DIY Hifi Soviet Union 6H3n-E Tube preamplifier board /Tube preamp kit L13-2

    $34.00 to $39.00
    From China
    $6.50 shipping
    Brand: Unbranded
  • PRT-03A Hifi Stereo Tube Preamp kit base on C22 preamplifier Circuit ( No tubes)

    Note: This is a DIY kit, all the parts need solder by yourself. Kits not include 3pcs tubes. Mclntosh C22 tube preamp, dynamic very sharp, a few gallbladder in front of a dynamic stone works. The board reference Mclntosh C22 circuit, designed with dual single stand-alone design, physically left and right channels 100% separation, independent grading ground. PCB size: 100 * 150 * 1.6MM, spray tin process Materials used: Taiwan production of colored metal ring resistors 1% accuracy MKP coupling capacitor Ceramic tube seat Input voltage: DC-280V two groups, each group is not less than 10MA DC12.6V one group, not less than 0.8A (for filament) Recommend the use of electronic tube: 12AX7 and its compatible tube (excluding Tubes).
    $16.77
    Top Rated Plus
    $3.55 shipping
    From Hong Kong
    or Best Offer
    Brand: Unbranded
    17 watching
    Type: Tube Pre-Amp
  • (DIY kit) PRT05A Hifi Tube Preamp Board base on conrad-johnson C-J Circuit

    Note: this is a kit, need yourself to soder all the components. Not contain tubes. The PRT05A refers to the Conrad-johnson CL circuit. The design uses a dual-single-independent design. It physically separates 100% of the left and right channels and is grounded independently. PCB size: 144*178*1.6MM, spray tin process Recommend works voltage: High voltage: 0-AC220V 0-AC220V (above 10MA) Filament voltage: 0-AC6.3V (above 1A ) 0-AC6.3V (above 1A ) The High voltage AC200V-250V is ok , Filament voltage (AC6V-7V is ok) Note: the default price is not include the tubes. This board can works with following tubes: 12AX7、12AU7、12AT7.
    $38.95
    Top Rated Plus
    $7.00 shipping
    From Hong Kong
    or Best Offer
    Brand: Unbranded
    13 watching
    Type: Tube Amplifier
  • (DIY kit) V18 RIAA MM 12AX7 Tube phono stage amp /preamp base on EAR834 L4-28

    This tube Phono Amplifier is base the famous UK EAR834 Circuit. the sound is very good. Using 3 pcs Shuguang 12AX7 tubes. Note: this is only a MM Phono Amplifier. can not connect with MC Phono. also can not be used as a Ordinary preamp to use it.
    $175.00
    From China
    $50.00 shipping
    Type: Power Amplifier
    37 watching
  • PRT-02A Dual Channel 6N2 Vacuum Tube Preamp Kit based on classic M7 Preamplifier

    Please note: Note: this is a DIY kit, all the components will need yourself to solder it. RT-02A reference to the famous classic M7 amplification circuit, DC filament power supply, high voltage band regulator and electronic filtering, direct streaking. Allowing players to spend very little cost and access to High cost-effective products. Work voltage: 0-AC(6-12V) above 1A. (when above AC9V. please note the heatsink temperature) 0-AC(200V-240V) above 10mA The gain default is about 10 times PCB size: 127X75mm (W*L) The tube hight is about 80mm ( inlcude Copper pillar size).
    $21.55
    Top Rated Plus
    $4.50 shipping
    From Hong Kong
    or Best Offer
    Brand: UnbrandedType: Tube Pre-Amp
  • 6N3/ 5670/ 6H3 Stereo Tube Preamplifier Preamp Kit base on Matisse Fantasy Stage

    6N3/5670 Tube preamplifier board Reference Matisse preamp circuit DIY HIFI Kits This is DIY KIT, you need to solder it by yourself. with Taiwan potentiometer and 6N3 *2 Tubes , please Note. Parameters: PCB Size: 132mmx99mm Features: * The new 6N3 tube * 2, can be replaced with the US 5670. * Potentiometer compatible with ALPS16 and ALPS27 potentiometers (default Taiwan potentiometer) * Coupling is the new WIMA and Swedish EVOX * Resistance is the United States DALE * Filament voltage is LM317 regulator into 6V. * Gold plated tube holder * The main capacitor is disassembled BC 1500UF * 10 times the circuit amplification, you can reduce the value of 22K * Transformer requirements 60VX1 9VX1 (with error), 60V current 100MA-200MA can, 8v required a little larger current.
    $28.68
    Top Rated Plus
    Free shipping
    From Hong Kong
    or Best Offer
    Brand: UnbrandedType: Tube Pre-AmpColor: Blue
  • PRT-03A Hifi Stereo Tube preamp kit (base on C22) + Power supply kit (no tubes)

    (PRT-03A Hifi Stereo Tube preamp kit base on C22 preamplifier. preamp PCB Size: 100 150 1.6MM. ( this default price is not include tubes). Ceramic tube socket. dynamic sharp / low frequency with elasticity / sound field width / three fields are balanced.
    $41.00
    From China
    Free shipping
    Brand: UnbrandedType: Tube Pre-Amp
  • Hifi Stereo Tube preamp kit base on C22 preamplifier Circuit ( No tubes) 12AX7

    Note: This is a DIY kit, all the parts need solder by yourself. Kits not include 3pcs tubes. Mclntosh C22 tube preamp, dynamic very sharp, a few gallbladder in front of a dynamic stone works. The board reference Mclntosh C22 circuit, designed with dual single stand-alone design, physically left and right channels 100% separation, independent grading ground. PCB size: 100 * 150 * 1.6MM, spray tin process Materials used: Taiwan production of colored metal ring resistors 1% accuracy MKP coupling capacitor Ceramic tube seat Input voltage: DC-280V two groups, each group is not less than 10MA DC12.6V one group, not less than 0.8A (for filament) Recommend the use of electronic tube: 12AX7 and its compatible tube (excluding Tubes).
    $16.77
    Top Rated Plus
    $3.50 shipping
    From China
    or Best Offer
    Brand: UnbrandedType: Tube Pre-Amp
  • Hifi Stereo 12AX7 Tube preamplifier board / kit base on Marantz 7 preamp L12-55

    $25.00 to $60.00
    From China
    $7.00 shipping
    Brand: Unbranded
  • M7 Marantz 7 Circuit PRT07A Tube Preamplifier / Vacuum Phono Amplifier Preamp

    $9.99 to $31.55
    Top Rated Plus
    Free shipping
    From ChinaBrand: Unbranded
  • Tube 6N3 Preamp TDA7294 Power Amplifier Kit DIY 80W+80W

    OutPower:80W 80W 8ohm.
    $38.00
    From China
    $10.00 shipping
    Type: Power Amplifier
    16 watching
  • NEW EK JAPAN TU-8500 ELEKIT Tube Preamp Kit from JAPAN

    This is a preamp kit with a phono equalizer with features such as below;. Select from 100V, 115V, 200V, and 230V upon assembly. Input resistance: [MM] 50kΩ / [MC] 100Ω. SN ratio (IHF-A): [MM]108dB / [MC]88dB.
    $517.91
    From Japan
    Free shipping
    Type: Tube Pre-Amp
  • Douk Audio 6J4+6P6P Class A Vacuum Tube Preamp Stereo Valve Preamplier DIY KIT

    Tubes used: 2pcs 6P6P, 2pcs6J4, 1pc6z5P. Douk Audio 6j4 6p6p Class A Tube Pre-Amplifier DIY Kit. Aluminum Chassis/DIY Enclosure. DIY Chassis / Enclosure. Hi-Fi Tube Amplifier. Audio Accessory. Nobsound®——Dou​k Audio.
    $92.14
    From China
    Was: Previous Price$96.99
    Type: Tube Pre-Amp
    $36.00 shipping
    Color: Silver
    38 watching
  • DIY Tube preamp power supply kit DC200V + DC200V + DC12.6V (6.3V) ---L3-28

    (two 200V can connect as DC200V 0 -DC200V). (this kit included 2pcs 200V Zener diodes. if you just need output DC200V. so just installed this one 200V Zener diodes. another one shorted. for example. ).
    $19.50
    From China
    $4.00 shipping
    Type: Tube Pre-Amp
    8 watching
  • DIY PRT-02A 6N2 Stereo Tube Preamplifier Kit base on Classic M7 Preamp Circuit

    Please note: Note: this is a DIY kit, all the components will need yourself to solder it. RT-02A reference to the famous machine's classic AN M7 amplification circuit. Allowing players to spend very little cost and access to High cost-effective products, DC filament power supply, high voltage band regulator and electronic filtering, direct streaking. Allowing players to spend very little cost and access to High cost-effective products. Work voltage: 0-AC(6-12V) above 1A. (when above AC9V. please note the heatsink temperature) 0-AC(200V-240V) above 10mA The gain default is about 10 times PCB size: 127X75mm (W*L) The tube hight is about 80mm ( inlcude Copper pillar size).
    $21.58
    Top Rated Plus
    $4.50 shipping
    From Hong Kong
    or Best Offer
    Brand: UnbrandedColor: Yellow
  • DIY hifi TE-01A DC6V 6J1 tube preamp kit / Vacuum tube preamplifier

    DIY hifi 6J1 tube preamp kit / Vacuum tubes preamplifier kit. This preamp boar using beijing 6J1 tube, classic transistor amplifier circuit, work in class A, more easily to mach with the power amplifier, almost any amplifier line can be satisfied with the results.
    $18.00
    From China
    $5.00 shipping
    Type: Tube Pre-Amp
    18 sold
  • Tube Preamp Buffer Kit Reference Musical Fidelity circuit board 6922/ 6N11/ 6DJ8

    Note: This item does not include two tubes (output coupling capacitor random shipments, Images by reference) "X10-D" music fax preamp gall buffer plate indicators: Distortion: 0.008% (10Hz ~ 100KHz) Frequency Response: 10Hz ~ 100KHz (± 0.2db) Output Impedance: 200Ω, Tubes can be used 2pcs 6DJ8,6922, or 6N11, dual 12V -30V DC power supply through the machine inside. Signal 1: 1 buffer. Basic Specifications: PCB Size: 10.0 × 10.0cm (military Immersion Gold) Process: KB-level military board high-precision CNC machining Sheet thickness and specifications: 1.6mm KB Kingboard A grade FR4 board Power Description: Dual 12V-30V DC power supply! Recommend the use of power supply, such as LM317.337. Filament need 12-12.6V power, this power can be used independent of 12V, 12V filament can.
    $12.09
    Top Rated Plus
    Free shipping
    From Hong Kong
    or Best Offer
    Brand: Unbranded
    23 watching
    Type: Tube Pre-Amp
  • PRT-03A Hifi Stereo Tube Preamp kit (base on C22) + Power supply kit (no tubes)

    PRT-03A Hifi Stereo Tube preamp kit (base on the famous C22 preamplifier) HV Power supply kit (The link is for DIY kit. all the parts will need youself to solder it) Sound features: dynamic sharp / low frequency with elasticity / sound field width / three fields are balanced. Preamp board Works voltage: DC280V (above 10ma ) X 2 groups and DC12.6V ( above 0.8A) Power supply board input voltage: 0-AC220V X 2 (200V-240V are ok) 0-AC12V X 1 (12-15V are ok) Preamp PCB Size: 150*100*1.6MM PSU PCB Size: 130*70*1.6MM Taiwan metal film resistance 1% accuracy MKP coupling capacitor Ceramic tube socket. This board can using 3pcs 12AX7 or some other same type tubes (12AXX series are all ok).
    $33.58
    Top Rated Plus
    $6.50 shipping
    From Hong Kong
    or Best Offer
    Brand: UnbrandedType: Tube Pre-Amp