Welcome to my ebay store! You will find your favorite products. Pass by do not miss.thank you! Product Detail (--- ayanhu81 ebay shop welcome you to buy it ---) The main features are as follows: (--- ayanhu81 ebay shop welcome you to buy it ---) 1, compatible with a variety of specifications rectifier diodes. 2, three-terminal adjustable regulator blocks and TO3P compatible TO220 packages. 3, to improve the protection measures that can provide full protection under extreme conditions. 4, offers a variety of means to adjust the sound, when using more sensitive to supply direct heating filament tube, can also further optimize the tone. 5, Can used to 101 tube preamp filament power supply ;Overvoltage protection, soft start, adjustable output voltage;Low noise, low dropout, it can be applied to SOLO amp, headphone amplifier. We can provide the following three modes of operation: (--- ayanhu81 ebay shop welcome you to buy it ---) 1, a simple 2 or 3 π type RC or LC filter. 2, using LM317 / LM350, three-terminal LT1083 / 84/85 and other adjustable regulator blocks. 3, using the LM317 / LM350, LT1083 / 84/85 made constant current power supply circuit. PCB Size: 12.5 × 6.7 cm. Fixing hole spacing 11.4 × 5.4 cm. Thickness of 1.6mm, FR4 material, blue solder. Circuit diagram (reference): (--- ayanhu81 ebay shop welcome you to buy it ---) Ultra-low noise power supply board member selection Description: (--- ayanhu81 ebay shop welcome you to buy it ---) C1 ~ C4: 22n / 100V, use MKT, pressure or 100V 63V MKP film capacitors, the capacity range of 22 ~ 47nF can be. C5: 0.01μF / 1KV, ceramic capacitor. C6, C7: 10000μF35V electrolytic capacitors, the main filter capacitor voltage above 35V, electrolytic diameter of 25mm or less. C8, C9: 0.22μF100V, 0.47μF100V MKT or MKP film capacitors. C10: 100μF35V electrolytic capacitors, is part of the soft-start circuit charging capacitor, to increase the capacity of the power soft-start time can be extended. C11: 10μF35V electrolytic capacitors, after sampling in order to reduce the ripple voltage across the resistor W and set bypass capacitors, plus 15dB ripple rejection effect can be improved. C12, C14: 100μF35V electrolytic capacitor, the capacity should not be too big, too much effect circuit transient indicators. C13: 0.1μF100V, MKT or MKP film capacitors. R1, R2: 0.1Ω5W, current limiting resistor in the range: 0.05 ~ 0.15Ω. R3: 0.1Ω5W, metal oxide film resistors or white cement resistance, used and C6, C7 constitute RC filter circuit, in the range: 0.01Ω ~ 10Ω5W. R4: 47K, 1 / 2W metal film resistors, three-terminal adjustable soft-start circuit regulator blocks, increasing the resistance can extend the power soft-start time, is generally preferable 10K ~ 100K. R5: 200Ω1 / 2W metal film resistors, LM317 minimum load current of not less than 5mA, to ensure the provision of not less than 5mA of load current, max R5 is 1.25V / 5mA = 250 Europe, actual production in Europe of 100 to 240 Room selection. W1: 5K, 3296 Series multi-turn potentiometer, and R5 constitute the three-terminal adjustable voltage regulator power supply circuit. Using more than 3296 turn potentiometer. R6: 1K, 1 / 2W metal film resistors, the output of the power indicator LED current limiting resistor. R7: 1Ω ~ 5Ω, power 3 ~ 5W, metal oxide film resistors, using an IC chip without installation. IC chip is not installed, install the resistor constitutes two RC filter circuit. R0, R8: 1.8K, 1 / 2W metal film resistors, fuse disconnect is indicated by a red 3mm LED current limiting resistor. D1 ~ D4: a rectifier diode, which can use ordinary 1N4004,1N5404,10A10, FR307 this diode can also be used TO220 package fast recovery rectifier diodes, such as HFA25PB60 like. D5 ~ D7: 1N4007, mainly on the three-terminal regulator block provides protection. D8: 3mm or 5mm emitting LED, the color is not limited, to the power supply output voltage indication. Q1: LM317, other common LM350, LT1083 / 84/85 series three-terminal adjustable voltage regulator can be used. Q2: 2SA1015, Vceo = -50V, Ic = 0.15A, β> 40, may also be other similar small power PNP transistor substitution, pinout PCB design is an equilateral triangle, so that better compatibility, install other models Note transistor distinguish pins. FUSE 1: 5 × 20mm, 2A ~ 10A, FUSE 2: 5 × 20mm, 2A ~ 5A, Blown fuse indicating use 3mm red light tube, PCB board not marked, when welding must be installed from the back (below the two fuses), please note the polarity during installation. (--- ayanhu81 ebay shop welcome you to buy it ---) Package Included: 1x Low Distortion Power supply Bare Board (not contain other parts) Feedback > We maintain hightest buyer ratings > Positive Feedback will be much appreciated from you. > Any dissatisfaction, please contact us immediately! > Please do not leave neutral or negative feedback before we help you out. Payment > We accept PayPal only. > All major credit cards are accepted through secure payment processor PayPal. > Payment must be received within 7 days of auction closing. Shipping > We Ship to Worldwide, except Hong Kong, Nigeria..... > Items will be shipped within one business day on payment received. > Items are shipped from China using Airmail, delivery time depends on destination and other factors,reach most of the countries within 10 to 35 business days. Country Shipping Way Shipping Time Tracking Number United States China Post 7-12 Yes Russian China Post 15-35 Yes Other Country HK /Swiss Post Air Mail 15-45 No Brazil / Africa HK /Swiss Post Air Mail 35-65 No Returns > Defect: We will fully refund or send you a new replacement,please contact and return within 14 days. > Dissatisfaction: Please contact within 3 days, we will fully refund, after got your returned goods. > Missing parts/Q'ty: Please contact us immediately,for a new package arranged,or a partial refund issued. Contact us > If have any question, Please contact us by ebay message before leaving neutral, negative feedback or open any dispute, we will reply within 24hours, ensure that help you solve the problem, make you satisfied. > Our Working-time From 8:30 AM to 21:30 PM(GMT+08).
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