DIY PCB Board Tube PreAmp or SET PS Power Supply HV LV 50-400VDC 300B 6SN7 12AU7

Description: 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 deal-breakers 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, up to 200mALow Voltage: 2.5-12.6VDC up to 4.5AHeater 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 gets 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 4" X 6.25" board.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. 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, although I do my belt to take care of that below. For example, if a capacitor is out of stock try a slightly higher voltage or capacitance of the same lead spacing and series. Or try another high quality capacitor with the same specs. Also, there's some wiggle room with resistor values of the same wattage. Note main picture shows a slightly different revision but with exact same schematic. However, I do my best to keep the Mouser BOM up to date and also list alternatives below. *** The Microchip LDO that's vital to this circuit is usually out at Mouser (and everywhere else I've looked) and has a long lead time. I have some available that can be purchased with this PCB. The BOM lists the 5 amp version, but most circuits will not use more than 3 amps. Choose the 3A (MIC29302WT) or 5A (MIC29502WT) version when ordering if you'd like to get one with the board. 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: 0a621f3a38 Part Value Mouser Alternate Additional Needed 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-MKP20.1/100/5 505-MKP20.1/100/10 C10 .1uF 505-MKP20.1/100/5 505-MKP20.1/100/10 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-MKP4F031003C00JF C18 .1uF 505-MKP4F031003C00JF C19 .01uF 505-MKP4.01/630/10P Not used with Full Wave CT or Rectifier Tube C20 .01uF 505-MKP4.01/630/10P Not used with Full Wave CT or Rectifier Tube C21 .01uF 505-MKP4.01/630/10P Not used with Rectifier Tube C22 .01uF 505-MKP4.01/630/10P Not used with Rectifier Tube C5 10kuF - 15kuF 647-UKW1C103MHD 647-UFW1C103MHD C6 10kuF - 15kuF 647-UKW1C103MHD 647-UFW1C103MHD C7 10kuF - 15kuF 647-UKW1C103MHD 647-UFW1C103MHD C9 10kuF - 15kuF 647-UKW1C103MHD 647-UFW1C103MHD 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-HER108GR0G Not used with Full Wave CT or Rectifier Tube D10 HER108 821-HER108GR0G Not used with Full Wave CT or Rectifier Tube D11 HER108 821-HER108GR0G Not used with Rectifier Tube D12 HER108 821-HER108GR0G 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 532-513102B25 532-4880M IC2 uses the smaller heat sink KK6 SK129-PAD 532-529802B25G 532-4880M IC3 uses this larger heat sink 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-GBU6M 512-GBU8M R1 100 603-RSF1WSGT-52-100R R10 10 660-MOS3C100J 660-MOS3CT631R100J R11 100-300 279-ROX5SSJ200R If not using choke (size accordingly) R2 200k-300k 603-RSF3WSJT-73-270K R3 200k-300k 603-RSF3WSJT-73-270K R4 22K 279-ROX3SJ22K R5 10 660-MOS3C100J 660-MOS3CT631R100J R6 10 660-MOS3C100J 660-MOS3CT631R100J R7 68k 660-MOS3CT631R683J R8 300K 603-RSF100JB-73-300K R9 100K 603-RSF100JT-73-100K 66-CMO11003JLFTR IC1 LM317 511-LM317T IC2 BUT11A 512-BUT11A IC3 MC29502 998-MIC29502WT LIABILITY DISCLAIMERA 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.

Price: 20 USD

Location: Boulder, Colorado

End Time: 2024-01-19T21:08:35.000Z

Shipping Cost: N/A USD