eBay

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.

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 direct link for Poseidon KT88 PS BOM

Part

Value

Mouser

Notes

.01uF

505-M10.01/1000/10

Not used with Full Wave CT or Rectifier Tube

.01uF

505-M10.01/1000/10

Not used with Full Wave CT or Rectifier Tube

.01uF