This auction is for ONE bare PCB.  I created this PCB for a personal project.  Originally I planned to buy the PS-1 designed by John Broskie.  John designed the Aikido line stage and has some great power supplies.  The PS-1 is a great power supply but it didn't have a few things I was looking for.  I really wanted to get 6.3VDC regulated voltage out of 6.3VAC winding on my transformer and I wanted headroom for high current heater projects.  I also wanted some options to use a choke with the high voltage.  Those were dealbreaks for me and his boards couldn't give me what I needed.  So I designed my own.  I ended up with a great board and had plenty of extras made for fellow hobbyists. 

High Voltage:          50-400VDC @ 200mA

Low Voltage:           2.5-12.6VDC @ 4.5A

 

Heater Circuit:

• Regulated 6.3VDC from 6.3VAC winding with the use of schottky diodes and super low dropout regulator.  Or 5VDC from 5VAC, etc.  This isn’t possible with almost every power supply out there.
• Voltage doubler jumper and trimpot adjustment.  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 standard 6.3VAC transformer winding now allows the use of twice the tube choices.  Go price a NOS 12SN7 vs a NOS 6SN7 and see how this board pays for itself.
• Huge capacitance for ultra-low ripple.  45,000uF capacitance.
• Full 4.5 amps of available heater current.  High current components and heat management designed in.  Large heat sink on LDO and heat sinks on all rectifying diodes.  Remember you need 1.8X the DC current from your transformer.  For example: to power 4 6SN7 tubes for a total of 2.4A, you need a theoretical bare minimum of 4.32A available from your transformer.  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).    
• Two sets of heater outputs.

High Voltage Circuit:

• Regulated output using Maida circuit.
• Huge capacitance for ultra-low ripple.  256uF capacitance.
• Accepts multiple configurations.  Full wave bridge, tube rectifier, or full wave center tap.
• Allows for external choke filter (C-L-C) or 5W voltage dropping resistor (C-R-C).
• Two sets of B+ outputs.

Additional Features:

• ¼ B+ reference circuit built in.  Elevates the heater ground to ¼ of the B+ voltage.  Provides for hum free power and cathode protection.
• House ground isolation circuit built in.  Chassis and House ground attach to the board for a hum free experience.
• A jumper location is provided to ground directly through one of the mounting screws for the chassis ground.  Or wire the chassis ground traditionally with the provided wire pad.
• Designed for use with high end audio grade components (Wima MPK series, Nichicon KX and KW series, etc). 
• Small and compact.  All this circuitry is smartly arranged on a 10cm X 15cm board (3.94” x 5.91”).
• Thick PCB with 2 ounce traces.

A BOM from Mouser is below.  I used all high end components (Wima and 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.  I do my best to keep the direct link BOM updated.  You may notice a few substitutions as a result.

Mouser direct link for Pre-Amp PS BOM

Part	Value	Mouser		Notes
C1	.01uF	505-MKP20.01/100/5
C2	.01uF	505-MKP20.01/100/5
C3	.01uF	505-MKP20.01/100/5
C4	.01uF	505-MKP20.01/100/5
C8	.1uF	505-MKP20.1/100/5
C10	.1uF	505-MKP20.1/100/5
C13	.1uF	505-MKP4-0.1/630/5
C14	.1uF	505-MKP4-0.1/630/5
C16	.1uF	505-MKP4-0.1/630/5
C17	.1uF	505-MKP4.1/250/10P
C18	.1uF	505-MKP4.1/250/10P
C19	.01uF	505-M10.01/1000/10		Not used with Full Wave CT or Rectifier Tube
C20	.01uF	505-M10.01/1000/10		Not used with Full Wave CT or Rectifier Tube
C21	.01uF	505-M10.01/1000/10		Not used with Rectifier Tube
C22	.01uF	505-M10.01/1000/10		Not used with Rectifier Tube
C5	15kuF	647-UKW1C153MRD
C6	15kuF	647-UKW1C153MRD
C7	15kuF	647-UKW1C153MRD
C9	15kuF	647-UKW1C153MRD
C11	56uF	647-LKX2W560MESY25
C12	100uF	647-LKX2W101MESY40
C15	100uF	647-LKX2W101MESY40
D1	625-SBLF10L25	625-SBLF10L25-E3
D2	625-SBLF10L25	625-SBLF10L25-E3
D3	625-SBLF10L25	625-SBLF10L25-E3
D4	625-SBLF10L25	625-SBLF10L25-E3
D5	1N4007	621-1N4007
D6	1N4007	621-1N4007
D7	1N5341	833-1N5341B-TP
D8	1N4007	621-1N4007
D9	HER108	821-HER108		Not used with Full Wave CT or Rectifier Tube
D10	HER108	821-HER108		Not used with Full Wave CT or Rectifier Tube
D11	HER108	821-HER108		Not used with Rectifier Tube
D12	HER108	821-HER108		Not used with Rectifier Tube
KK1	SK104-PAD	532-513102B25	532-4880M	Optional (if heater current >2.4A)
KK2	SK104-PAD	532-513102B25	532-4880M	Optional (if heater current >2.4A)
KK3	SK104-PAD	532-513102B25	532-4880M	Optional (if heater current >2.4A)
KK4	SK104-PAD	532-513102B25	532-4880M	Optional (if heater current >2.4A)
KK5	SK129-PAD	532-529801B25G	532-4880M
KK6	SK129-PAD	532-529801B25G	532-4880M
JP1	3X1X2.54	571-3-644456-3	538-15-29-1024
TR1	0-1000	594-64W102
TR2	0-1000	594-64W102
B1	RECTIFIER-GBU4	512-GBU8M
R1	100	281-100-RC
R10	10	283-10-RC
R11	100-220	286-200-RC		If not using choke (size accordingly)
R2	200k-220k	283-220K-RC
R3	200k-220k	283-220K-RC
R4	10K	283-10K-RC		Lower value might be needed if desired B+ is not being reached.
R5	10	283-10-RC
R6	10	283-10-RC
R7	68k	660-MOS3CT631R683J
R8	300K	281-300K-RC
R9	100K	281-100K-RC
IC1	LM317	511-LM317T
IC2	BUT11ATU	512-BUT11ATU
IC3	MC29502	998-MIC29502WT