$23.49 Buy It Now or Best Offer
free,30-Day Returns
Seller Store eama0910
(10165) 99.4%,
Location: Wuhan
Ships to: US,
Item: 116222252214
Restocking Fee:No
Return shipping will be paid by:Buyer
All returns accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money Back
Return policy details:
Jolooyo:Jolooyo
Type:20W Class A
Unit Type:Unit
Country/Region of Manufacture:China
Unit Quantity:1 pc
To Fit:Amplifier
Low Distortion Low Noise Fully Direct Coupled Dual Op Amp Preamp with ALPS16 / ALPS27 PotentiometersLine CharacteristicsThe second version of the dual-amplifier direct-coupled preamplifier circuit without input, output and decoupling capacitors.Integration of power supply, volume and pre-amplification in one unit.Adopt LM317/337 for high-precision voltage regulator regulator precision, ripple rejection than 78/79 a grade higherOp-amp operating power supply: ±15.00VOptional ALPS 16 or 27 type potentiometer for volume control ALPS 16 is necessary/most basic.This preamp has: very low distortion, very low noise, very flat bandwidth See test below. MaterialsAll new componentsALPS16 or ALPS27 potentiometerKOA high precision, high stability audiophile resistors.Philips fast recovery diode rectifier3300uF mains electrolytic filteringKingboard’s high quality 2mm thick printed circuit board and 70um thick copper.Soldered with American ALPHA wire SpecificationPrinted board size: 96×58mmPower supply voltage: AC15-18VThis board is equipped with TI flagship OPA1612 dual op-amp AP test test data is very good!Undistorted output: 10.8VAmplification: 5.68 timesResidual noise: 3.24uVSignal-to-noise ratio: 130.3dBDynamic range: 130.3dBTHD distortion：0.000073%THD+N distortion: 0.00021%Frequency response bandwidth: ±0.050dB After-sales serviceEach finished board before shipment to test the distortion, noise, midpoint, magnification, etc., qualified before shipment, are photographed and retained!The second version of the special instructionsIncrease the main capacitor; increase the potentiometer (available ALPS27); use fast recovery diodes; supply voltage 12v to 15v;Package：1pc Low Distortion Low Noise Fully Direct Coupled Dual Op Amp Preamp with ALPS16 / ALPS27 Potentiometers Payment Method: PayPal preferred Shippment: 1.We provide free shipping to international via China 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 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!
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