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 MKIII clone.
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 KT88/EL84 build.

Quick way to load the BOM below is to do a web search for "Mouser Project & Cart Sharing". Follow the first link and then enter this project ID: a9ab3cfe3c

Mouser BOM below that you can import using their BOM tool.

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-MKP4J032204J00KF	Use 505-MKP4O131004JKSSD if B+ > 630V.
C10	.22uF	505-MKP4J032204J00KF	Use 505-MKP4O131004JKSSD if B+ > 630V.
C13	.22uF	505-MKP4J032204J00KF	Use 505-MKP4O131004JKSSD if B+ > 630V.
C16	.22uF	505-MKP4J032204J00KF	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	100uF	871-B43255A5107M000	Up to 30mm diameter.
C12	100uF	871-B43255A5107M000	Up to 30mm diameter.
C14	100uF	871-B43255A5107M000	Up to 30mm diameter.
C15	100uF	871-B43255A5107M000	Up to 30mm diameter.
D1	HER108	821-HER108GR0G	Not used with Full Wave CT or Rectifier Tube
D2	HER108	821-HER108GR0G	Not used with Full Wave CT or Rectifier Tube
D3	HER108	821-HER108GR0G	Not used with Rectifier Tube
D4	HER108	821-HER108GR0G	Not used with Rectifier Tube
D5	HER108	821-HER108GR0G	Bias supply
TR1	0-10K	594-64W103	Bias supply. Omit if using external pot.
R13	1k	660-MOS3CT631R102J	Bias supply
R14	18k	660-MOS3CT631R183J	Bias supply
R2	220k	603-RSF100JR-52220K
R3	220k	603-RSF100JR-52220K
R5	220k	603-RSF100JR-52220K
R6	220k	603-RSF100JR-52220K
R8	220k	603-RSF100JR-52220K
R9	220k	603-RSF100JR-52220K
R11	220k	603-RSF100JR-52220K
R12	220k	603-RSF100JR-52220K
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	660-MOS3CT631R563J	Size accordingly for H3 voltage (3W)

LIABILITY DISCLAIMER

A person who constructs or works on electronic equipment may be exposed to hazards, including physical injury, the risk of electric shock or electrocution, and exposure to hazardous substances such as lead, mercury, and other inorganic or organic compounds. These hazards can result in health problems, injury, or death. Only qualified persons who understand and are willing to bear these risks themselves should attempt the construction of electronic equipment. By purchasing this item, the buyer acknowledges these risks.

Vacuum tubes operate at high temperatures, may contain toxic substances, and may have exposed parts that carry hazardous voltages. There is a risk of electric shock, electrocution, burns, or fires that is inherent in the construction and use of vacuum tube equipment. By purchasing this item, the buyer acknowledges these risks.

IN NO EVENT SHALL THE SELLER BE LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY NATURE including, but not limited to, property damage, personal injury, death or legal expenses. Buyer's recovery from Seller for any claim shall not exceed the purchase price paid by Buyer for the goods, irrespective of the nature of the claim, whether in warrant, contract or otherwise. By purchasing this item, BUYER AGREES TO INDEMNIFY, DEFEND AND HOLD SELLER HARMLESS FROM ANY CLAIMS BROUGHT BY ANY PARTY REGARDING ITEMS SUPPLIED BY SELLER AND INCORPORATED INTO THE BUYER'S PRODUCT.

If you do not agree to this disclaimer, DO NOT BUY THIS ITEM.