• New ListingDIY PCB Board Tube Amp Universal PS Power Supply HV with Neg Bias KT88 EL34 EL84

    Perfect board to power any tube amp, especially KT-88 or EL34 push pull, 300B SET. Great match for a Dynaco clone (ie: use with Poseidon MKIII driver boards). Use with or without negative bias circuit.
    $22.00
    Free shipping
  • New ListingDIY PCB Board - Tube Amp - LV Tube Heater DC Power Supply - 6.3VDC from 6.3VAC

    Allows for switching between 6.3V tubes and 12.6V tube without pulling out your soldering iron. Simply move the jumper and dial in the pot. A safer rule of thumb is 2.0X the DC current.If you're using the doubler, then current get cut in half once more (darn that Ohms law).
    $11.00
    $3.50 shipping
  • New ListingDIY PCB Board OTL Tube Headphone Amp Aikido White Cathode Follower 6SN7 6BX7

    The original goal of this project was to have a compact octal tube OTL headphone amplifier that would drive low impedance headphones (down to 32 Ohm). I also wanted an external choke. All those needs forced a custom PCB.
    $35.00
    Type: Headphone Amplifier
    Free shipping
    Color: White
  • 6N4 / 12AX7 + EL84 / 6P14 Push-pull Tube Power Amplifier 10W+10W Stereo Amp PCB

    PCB size: FR4 192X90X1.6MM Test data: The maximum undistorted output voltage is about 8.9V, the load is 8 ohms, and the output power is about 10W. Distortion 0.809%.
    $12.99
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    20 watching
    Type: Power Amplifier
  • 6L6/EL34 Tube Rectifier High Voltage Regulated Power Supply PCB fr Push-pull Amp

    Parallel tube design, install 6N13P the maximum possible output current 700MA around, a lot of big eight-foot vacuum Tube generic. Playability is very strong, the maximum design voltage on 450V, then a high-voltage capacitor and the need to change Q1, when a large load, 510K ~ 1M can be fitted with this resistance, the resistance between 510K ~ 1M adjustment tube can be no ignition. The power supply voltage adjustment range, excellent regulation performance, low output ripple, and flexible adjustment of bile choice. Input can not be lower than 100V, Output DC 118V-450V adjustable, ideal for use in WCF and J version tube preamp, those interested can try. Zener diode D3 range of options can be very wide, 10 ~ 20V / 1W can be. But it notes that when the regulator voltage value selected i.
    $7.58
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    29 watching
  • 6N11/6DJ8 Tube Buffer Preamp SRPP Preamplifier Tube Headphone Amp Board Bare PCB

    6DJ8 SRPP circuit is Morgan Jones (Morgan Jones) designed tube headphone amplifier. For beginners who are exposed to the amp, this circuit is easy to use, the success rate is high, and the headphones with different impedances can be used. Suitable for 15Ω to 300Ω headphones. As the SRPP on the power requirements of the strict, recommended high voltage, low voltage regulator line, the power line ripple coefficient is small, for the bile to put the background quiet effect will be ideal. Fine FR4 double-sided glass fiber board, high-quality spray tin PCB board, thick copper foil, thickness 2mm. Plate size 110mm × 63mm. High voltage DC 200V power supply, low voltage filament 6.3V power supply part.
    $5.46
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  • DIY PCB - 3B7 Tube Single-ended DHT Hybrid Amp

    This is a blank PCB to build a single-ended stereo tube amplifier. It uses 3B7 directly heated triode tubes, driven by a solid-state driver circuit in class A2. It puts out about 2.5 watts. PCB only, no parts or anything else is included.
    $40.00
    Brand: Unbranded
    $8.00 shipping
  • DIY PCB - 50 watt monoblock " Engineer's Amplifier" tube amp

    This is a blank PCB to build a 50 watt monoblock version of "Engineer's Amplifier", a push-pull stereo tube power amplifier. It's easy to build - all the components mount on the PCB - and it sounds GREAT!
    $30.00
    Brand: Unbranded
    $8.00 shipping
    65 sold
  • DIY PCB - Push-pull tube amp driver PCB

    SINGLE blank PCB to build a push-pull monoblock tube power amplifier, using a variety of output tubes like the EL34, 6L6, and KT88. These hazards can result in health problems, injury, or death.
    $30.00
    Brand: Unbranded
    $8.00 shipping
    34 sold
  • DIY PCB - "Jonokuchi" tube headphone / speaker amp

    This is a blank PCB to build "Jonokuchi", a single-ended stereo tube headphone / speaker amplifier. Jonokuchi is a simple, easy-to-build tube headphone amplifier that can also drive small, high-efficiency speakers, like computer speakers.
    $40.00
    Brand: Unbranded
    $8.00 shipping
    151 sold
  • DIY PCB - Triple-Triode push-pull tube amp driver PCB

    It uses a single tube, a triple triode in a compactron envelope, like the 6AC10, 6AK10, or 6C10. SINGLE blank PCB used to build a push-pull tube power amplifier, using a variety of output tubes. These hazards can result in health problems, injury, or death.
    $30.00
    Brand: Unbranded
    $8.00 shipping
    52 sold
  • DIY PCB - Cap board for tube amp (for snapmount electrolytic caps)

    So, I designed this little PCB. PCB only, no parts or anything else is included. Photo of assembled PCB is for reference only!
    $12.00
    Brand: Unbranded
    $8.00 shipping
    198 sold
  • Tube Amp Negative Grid Bias Power Supply PCB Assembled 4 channel for PP or SE

    Electronic tube amplifier DIY adjustablenegative grid bias power supply board, single-ended and push-pull can be used. Can use each power tube to stabilize work and balance! Input AC voltage of about 10V-80V, adjustable output negative about 10-80V. This board size: 11.6CM X 3.1CM X 1.6MM (thick).
    $12.58
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  • DIY PCB - Smaller cap board for tube amp (for snapmount electrolytic caps)

    So, I designed this little PCB. PCB only, no parts or anything else is included. By request: I made a smaller version of the original cap board.
    $10.00
    Brand: Unbranded
    $8.00 shipping
  • DIY PCB - "Mighty Midget" tube amplifier

    This is a blank PCB to build "The Mighty Midget", a single-ended stereo tube amplifier. "The Mighty Midget" is a simple, easy-to-build tube amplifier. It is designed for beginners, and puts out about 3 watts.
    $40.00
    Brand: Unbranded
    $8.00 shipping
    52 sold
  • DIY OTL Tube Headphone Amp Kit (PCB, Case, Extras) Aikido WCF 6SN7, 6BX7

    The original goal of this project was to have a compact octal tube OTL headphone amplifier that would drive low impedance headphones (down to 32 Ohm). I also wanted an external choke. All those needs forced a custom PCB.
    $199.99
    $17.45 shipping
    26 watching
  • DIY PCB plus Tube & chip - NuClassD 50W amp using the Korg Nutube 6P1

    This is a PCB with a pre-soldered surface mount class-D amplifier chip (and a few JFETs) to build the "NuClassD" 50W power amplifier, a tube hybrid amp using the Korg Nutube 6P1. PCB with chip and Nutube 6P1 only - the other parts ARE NOT included.
    $60.00
    Brand: Unbranded
    $8.00 shipping
    Type: Power Amplifier
    51 sold
  • DIY PCB - Power-on delay circuit for tube amplifiers

    This is blank PCB used to build a power-on delay circuit for a tube amp. These hazards can result in health problems, injury, or death.
    $20.00
    Brand: Unbranded
    $8.00 shipping
  • DIY PCB plus Tube - Balanced (differential) preamp/head amp using Korg Nutube

    This is a PCB to build a balanced (differential) preamp or headphone amp using the Korg Nutube 6P1. PCB and Nutube 6P1 only - the other parts ARE NOT included. Note the PCB is one channel only. You would need two for a stereo amp.
    $60.00
    Brand: Unbranded
    $8.00 shipping
    Type: Power Amplifier
  • DIY PCB - "The Engineer's Amplifier" P-P 20W tube amp

    This is a blank PCB to build the "Engineer's Amplifier", a push-pull stereo tube power amplifier. It's easy to build - all the components mount on the PCB - and it sounds GREAT! PCB only, no parts or anything else is included.
    $50.00
    Brand: Unbranded
    $8.00 shipping
    92 sold
  • DIY PCB - V2 50 watt monoblock " Engineer's Amplifier" tube amp - No Sockets

    This is a blank PCB to build a 50 watt monoblock version of "Engineer's Amplifier", a push-pull stereo tube power amplifier. Version 2, without power tube sockets! Use whatever power tube you want - the socket mounts to the chassis and you connect it to the PCB with wires.
    $30.00
    Brand: Unbranded
    $8.00 shipping
  • DIY PCB - Power supply board for tube amps

    This application is shown on my web site here. PCB only, no parts or anything else is included. Photo of assembled PCB is for reference only! These hazards can result in health problems, injury, or death.
    $18.00
    Brand: Unbranded
    $8.00 shipping
    78 sold
  • 12AX7+12AU7+EL34 Stereo Push-pull Tube Power Amplifier Board Bare PCB PP Amp

    12AX7.12AU7.EL34. Push-pull tube amplifier circuit board, amplifier power amplifier board, PCB board Size; 215mm*135mm*2.5mm Immersion Gold Process EL34. The electronic tube holder can only be used PCB socket, such as: GZC8-Y, GZC8-Y-2 silver plated gold plated model, 12AX7.12AU7 electron tube can only use small 9-pin PCB socket, such as GZC9-Y silver plated gold plated etc. , There are electron tubes 4pcs EL34B, 2pcs 12AU7, 1pc 12AX7, Output cow with 5.5k 50W Transformer power supply board for the high voltage is about 440V The following jumpers on the board are connected to the tube 6.3V, the wiring holes 1. 2 -1. 2, 1. 2-1. 2,1. 2-1. 2- 1. 2, wiring 1--1 2-2.
    $16.89
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    From Hong Kong
    $7.90 shipping
    Brand: Unbranded
    or Best Offer
    Color: Black
    42 watching
  • 2pcs EL34 Tube Amp Bare PCB Reference Jadis JA30 Stereo Amplifier Circuit Board

    1 Pair Mono EL34 Push-Pull Tube Amp Bare Print Circuit Board with Upgraded design for Jardis JA30 DIYER (Tubes and components NOT included) Features: These Bare Print Circuit Board is for Twin Mono EL34 PP Amplifier DIYer •With circuit design upgraded from famous original •High quality of workmanship •Output 30W 30W •Specially designed for DIYer such that soldering can be carried out in the component side of the print circuit board (no need to turn over the print circuit board for soldering) •Also a flexible design print circuit board that component can be soldered on opposite side of the tube socket to make a exposed tube casing design •Use 2 pieces EL34, 1 piece 12AU7 & 1 piece 12AX7/ECC83 (not included) for each channel.
    $20.99
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    19 watching
  • Williamson Push-Pull Tube Amplifier Board PCB For 12AX7/12AU7/EL34/KT88/6P3/6L6

    Circuit board for 12AX7.12AU7.EL34.KT88.6P3.6L6.KT66.KT90 Note: This item only bare pcb. assembled photo only for reference. We do not provide technical support, only schematics and debug schematics. Parameters: Board size: 371mm X 163mm X 2.5MM Board power: (different tubes have different power is also different transformers) For example: 6V6 (about 12W 12W) 6P3 / 6L6 (about 20W 20W) EL34 (about 40W 40W) KT88 / 6550 (about 60W 60W) KT100 / KT99 (about 80W 80W) Features: * Both sides can be equipped with parts, which is very convenient for the enthusiasts to assemble and install according to their own requirements. * Multi-function selection of the circuit board.
    $55.00
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    5 watching
    Color: Blue