-40%

DIY PCB Board Tube Amp Universal PS Power Supply HV with Neg Bias KT88 EL34 EL84

$ 10.56

Availability: 37 in stock
  • Type: Board
  • All returns accepted: Returns Accepted
  • Refund will be given as: Money Back
  • Compatible Brand: Universal
  • Restocking Fee: No
  • Item must be returned within: 30 Days
  • Return shipping will be paid by: Buyer
  • Condition: New

    Description

    This auction is for
    ONE
    bare PCB.
    High Voltage:
    50-900VDC @ 300mA
    Negative Bias:
    Adjustable up to -80V
    High Voltage Circuit:
    Multiple input options available.  Options are tube rectified input, full wave bridge, full wave center tap, and full wave choke input.
    Huge capacitance capability.  Accepts series snap caps up to 30mm diameter.
    All electrolytic caps are bypassed with a film cap for improved high frequency characteristics.
    Configurable for up to 3 output voltages with standard configuration.  Easiest setup is an input filter, then the B+ voltage, then one to two drops for the driver voltages.
    Allows for external choke filter (C-L-C) or 5W voltage dropping resistor (C-R-C).
    Accepts up to 4 external choke filters or voltage dropping resistors.
    Two sets of outputs for each voltage and multiple ground pads.
    Ridiculously quiet power with ultra low ripple.
    Additional Features:
    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.  Designed for bias tap type transformers (ie: Hammond 300 series or Dynaco P774 or P784) or use a separate bias supply.
    Use the on-board pot or an external pot to adjust the bias.
    A jumper location is provided to ground directly through one of the mounting screws to the chassis.
    Designed for use with high end audio grade components (Wima MPK series, Nichicon, etc).
    All this circuitry is smartly arranged on a 3.50” x 6.75” board.
    Thick PCB with 2 ounce traces!!!
    An example BOM from Mouser is below.  I used all high end components (Wima, EPCOS, Nichicon Audio caps, etc).  Full schematic and board layout are above.  If you're handy you can wire one up point to point with all the info in this add and skip the need to buy the PCB.  Please know your skill level and knowledge of electronics before considering this PCB.  If Mouser is out of something try DigiKey.  You should be comfortable specifying substitutions.  In the BOM below I'd order everything except C1-C4 and D1-D4 for a Poseidon or other KT88/EL84 build.  I've provided a Mouser direct link to make ordering easier.  Occasionally the individual line items below become unavailable at Mouser.  I do my best to keep the direct link BOM updated.  You may notice a few substitutions as a result.
    Mouser BOM is below.  To access the BOM directly do a Google search for "Project & Cart Sharing".  After following that link enter this project code:
    a9ab3cfe3c
    Part
    Value
    Mouser
    Notes
    C1
    .01uF
    505-M10.01/1000/10
    Not used with Full Wave CT or Rectifier Tube
    C2
    .01uF
    505-M10.01/1000/10
    Not used with Full Wave CT or Rectifier Tube
    C3
    .01uF
    505-M10.01/1000/10
    Not used with Rectifier Tube
    C4
    .01uF
    505-M10.01/1000/10
    Not used with Rectifier Tube
    C7
    .22uF
    505-MKP4J032204JKSSD
    Use 505-MKP4O131004JKSSD if B+ > 630V.
    C10
    .22uF
    505-MKP4J032204JKSSD
    Use 505-MKP4O131004JKSSD if B+ > 630V.
    C13
    .22uF
    505-MKP4J032204JKSSD
    Use 505-MKP4O131004JKSSD if B+ > 630V.
    C16
    .22uF
    505-MKP4J032204JKSSD
    Use 505-MKP4O131004JKSSD if B+ > 630V.
    C18
    .22uF
    505-MKP20.22/100/5
    Bias supply
    C20
    .22uF
    505-MKP20.22/100/5
    Bias supply
    C17
    47uF
    647-UKW2A470MPD
    Bias supply
    C19
    47uF
    647-UKW2A470MPD
    Bias supply
    C5
    100uF
    871-B43255A5107M000
    Up to 30mm diameter.
    C6
    100uF
    871-B43255A5107M000
    Up to 30mm diameter.
    C8
    100uF
    871-B43255A5107M000
    Up to 30mm diameter.
    C9
    100uF
    871-B43255A5107M000
    Up to 30mm diameter.
    C11
    68uF
    871-B43254A5686M000
    Up to 30mm diameter.
    C12
    68uF
    871-B43254A5686M000
    Up to 30mm diameter.
    C14
    68uF
    871-B43254A5686M000
    Up to 30mm diameter.
    C15
    68uF
    871-B43254A5686M000
    Up to 30mm diameter.
    D1
    HER108
    821-HER108
    Not used with Full Wave CT or Rectifier Tube
    D2
    HER108
    821-HER108
    Not used with Full Wave CT or Rectifier Tube
    D3
    HER108
    821-HER108
    Not used with Rectifier Tube
    D4
    HER108
    821-HER108
    Not used with Rectifier Tube
    D5
    HER108
    821-HER108
    Bias supply
    TR1
    0-10K
    594-64W103
    Bias supply. Omit if using external pot.
    R13
    1k
    283-1.0K-RC
    Bias supply
    R14
    18k
    283-18K-RC
    Bias supply
    R2
    220k
    281-220K-RC
    R3
    220k
    281-220K-RC
    R5
    220k
    281-220K-RC
    R6
    220k
    281-220K-RC
    R8
    220k
    281-220K-RC
    R9
    220k
    281-220K-RC
    R11
    220k
    281-220K-RC
    R12
    220k
    281-220K-RC
    R1
    Jumper, Choke Input, or Voltage Drop Resistor (5W)
    R4
    Choke, or Voltage Drop Resistor (5W)
    R7
    6.8K
    283-6.8K-RC
    Size accordingly for H2 voltage (3W)
    R10
    56K
    283-56K-RC
    Size accordingly for H3 voltage (3W)