Description

HP-2 Class A Super Parallel Regulated Power Supply Main Filter Capacitor Board Note： The product is Test OK finished board with 2 Type I 10000uF/50V filter capacitors. Description: HP-2-PSU super-parallel class A regulated servo power supply, low internal resistance, high precision, excellent transient response, very suitable for grinding DAC, preamplifier, power amplifier in the voltage amplification stage and input stage, the effect is good, the actual listening The low frequency is rich and the high frequency is delicate. The standard version uses ST BD139-140 as the adjustment tube, and can also be replaced with a tube of the same foot such as Toshiba A1358-C3421, but please pay attention to the pressure resistance problem, different tubes will have a slight effect on the tone, BD139-140 has a better High cost performance, and the A1358-C3421 will feel better. The output voltage and input voltage (DC) are recommended to be no less than 4V differential pressure. A 5-8V differential pressure is recommended. If the differential pressure is too low, the filter and voltage stability will be affected. If there is too much pressure difference, a large amount of heat will be generated. Please pay attention to the heat dissipation of the tube. Reasonable setting of input current, generally set higher than AMP quiescent current 30%, too high will make the sound will be dull, high voltage and high current, please pay attention to the heating problem of the adjustment tube, using the chassis cooling is a good choice. Highlights: 1. Use double bridge rectification, one transformer can be used when configuring dual independent system 2, very low noise <350UV, very high voltage stability. After the thermal stability, the full / no-load regulation rate is <0.5%, the voltage does not drop after the load 3, the voltage can be adjusted from 8V-60V according to requirements. The current can output 10MA-1.5A (depending on the rectifier tube and the adjustment tube) Remarks: 1. Choice of R1： Output current = 0.65V / R1 R1 = 10R version of the positive and negative power supply are reserved for two resistance bits, generally with the front stage or voltage amplification level, select a group of 10R can be, if you want to play more extreme, you can press the above Formula, single or double resistance through the reserved resistance bits on the board to calibrate the desired sound 2. Selection of R2： When the output voltage is 12-30V, use about 10K When the output voltage is 30-50V, it is about 15K. When the output voltage is 50-70V, it is about 22K. 3. R3 selection： When the output voltage is 12-30V, use 4K-5K, When the output voltage is 30-50V, use 11K-12K When the output voltage is 50-70V, use 12-16K Package: 1pc HP-2 Class A Super Parallel Regulated Power Supply Main Filter Capacitor Board Payment Method: PayPal preferred Shippment: 1.We provide free shipping to international via China Post Airmail or Hong Kong Post Airmail, and every parcel will be registered with tracking number. We can also ship by UPS/EMS/DHL/FedEx for alternative shipping method for corresponding fees. Please let us know before payment if you need split shipment. 2.International shipping requires complicated shipping procedures (such as both countries customs, transit stations etc.), also will be affected by many factors, such as holidays, weather conditions etc, If you have not received your shipment within 30 days from payment, please contact us. 3.Time of Delivery:Based on the China Post Airmail or Hong Kong Post Airmail and our experience, kindly please be noted that To United States / United Kingdom / Australia, it takes around 10-15 business days; To Canada, it takes around 12-18 business days; To Brazil / South America, it takes around 25-35 business days. To Italy / France / Spain / Germany/ Eastern Europe, it takes aournd 15-20 business days. Returns & Replacements & Repair: We accept returns & replacements within 30 days from the day the customer receive the products, please make first contact within 30 days from receiving the order. Products should be returned in original condition. As a benefit to our customers, we also provide repair within 3 months from the day when this item is shipped out, after repair is done, we will send you the item, but the customer should pay both shipping ways. Feedback: 1)Your Feedback is really important to us, please take a few seconds to leave great feedback if you are satisfied with our product or service, thank you so much! 2)We always offer the lowest price for best goods and service to you. 3) Please contact us before leaving neutral(3 stars) or negative(1-2 stars) feedback.We will try our best to solve the problem and leave you a happy shopping mood here. Thank you!