Description: 1PCS JLH 1969 Class A HIFI Amplifier Board MOT/2N3055 Golden Quality PCB DIY KitProduct Image: Product Description: Please note before you buy: Products as shown in my main picture, one channel price. so if you need stereo channels, please buy 2pcs. it needs to solder by yourself .thank you! Features:Model:JLH1969Name: Amplifier Board1. Double-sided , thick copper PCB.This one is doubled-sided so the copper pad durability isgreatly enhanced by plated-through hole ( PTH) process.2. Hermetically sealed metal casing transistors used on both small signal and power stage.3. High quality electrolytic capacitors.4. High quality solder with silver content is used in soldering.5. ERO film capacitors for audio coupling.6. Thick and heavy aluminum plates already mounted on the board( as in the pictures) for easy to interface with heatsink.Specification:1.Operating voltage: DC 12V-35V (corresponding to 9-26V transformer)2.Output sound power: approx 10-15W3.It can be pushed 3-8 inches, 120 watts of power bookshelf box,full-range boxes. Sensitivity to be higher than 83db.4. Adjustable quiescent current between 0.3-1.8A,recommended 1.2 Ann (radiators need more than 0.7 kg).Adjust the midpoint / quiescent current method:midpoint:1. Select the universal table’s 10A ;,2. black pen -GND, red lead -TP1;3. Adjust the adjustable resistance KT1 (supply voltage 1/2)Current:1. Select universal table’s 10A,2. Loosen the screws of VCC supply, pull out the wires,3. One pen connected to the pull out wire, the other pen connected tothe screw of terminals, which is a measure of the current(equivalent to remove the VCC line of 1969 board , replaced with an ammeter),4. Adjust the adjustable resistor KT2 changing the current NOTE:the 2N3055 is ST or Motorola is pre-owneded in good condition. maybe the capacitor appearance is scratched,but all in good condition and unused. NOTE: if you purchased 2 of this item i will send you a pair of JLH 1969(L+R Channel) if you purchased 1 pic i will send you the L or R channel random. Package includes: 1pcs JLH 1969 Class A audio hifi power Amplifier Board High Quality PCB MOT/2N3055 diy kit(not assembled with all component as pic shown with heat sink) FeedbackWarrantyShipmentFeedbackWe appreciate your feedback very much. As it will motivate us do better. If you have any questions with our goods or service, Please kindly contact us firstly before leaving negative feedback. Thank you in advance Warranty1. All merchandise will be carefully test before shipping. We will try our best to avoid any quality problem. 2. We promise warranty for quality in one year and we will repair it free of charge. The returning shipping should be paid by customer. 3. If you are not satisfied with the product, Please contact us. We'll provide you a satisfying solution.Shipment1.Normmly we will send the goods within 1-3 working days after your payment is verified . 2.Please check if the goods are in good condition and sign before the delivery man leaves.If you find the product is lost or damaged on the way. Please take photo and let the delivery men confirm it. Then we will help you let the shipping company compensate you.On Jul-21-21 at 06:29:15 PDT, seller added the following information:
Price: 14.87 USD
Location: 深圳, 廣東省
End Time: 2025-01-21T14:01:24.000Z
Shipping Cost: 3 USD
Product Images
Item Specifics
Restocking Fee: No
Return shipping will be paid by: Seller
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Brand: Unbranded
MPN: No aplicable
UPC: Does not apply
EAN: Does not apply
