1Pcs JLH 1969 Class A HIFI Amplifier Board MOT/2N3055 Golden Quality PCB DIY Kit

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1Pcs JLH 1969 Class A HIFI Amplifier Board MOT/2N3055 Golden Quality PCB DIY Kit
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:JLH1969
Name: Amplifier Board
1. Double-sided , thick copper PCB.
This one is doubled-sided so the copper pad durability is
greatly 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 10-15W
3.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 to
the 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
)
Payment
Delivery details
Terms of sales
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To avoid unpaid item dispute,all payment must be received within 7days from the end aiction.
Note:Please list your special requests (color, packages, etc.) in the EBAY/PAYPAL NOTES SECTION when you make payment.
Delivery details
>tems will be shipped within 1~2 business day after 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.
> if you choose the standard shipping method or SpeedPAK the item will get to you with in 20 days.
Country
Shipping Way
Shipping Time
Tracking Number
United States
SpeedPAK
7-18
Yes
Russian
Post by Air Mail
15-35
Yes
Other Country
Post by Air Mail
15-45
No
Brazil / Africa
Post by Air Mail
35-65
No
Terms of sales
To keep our quality service high, please make sure you read our returns and payment policies carefully before bidding or buying. We do try our best to help customers with any questions that they may have.
We stand behind our products 100% and carefully inspected by us.
Customers may request for an exchange or refund less shipping & handng within 30 days of receipt.
Return of non-defective or wrongly purchased items will be subject to a 20% restocking fee.
Product must be returned in is original packaging.
Buyers are responsible for paying the return shipping & handing charges for any replacement or refund request.
About us
1.
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Have peace of mind knowing that your order will arrive brand new in its original factory sealed packaging. That means that you'll have the full force of the manufacture warranty to protect your purchase.
2.
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3.
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To meet different requirements for different clients, we have over 300 models with multi functions for your selection.
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