×
Super hot! Several others have checked this out in the last few hours
Verified by shoppers
Product always receives high satisfaction ratings from our customers
  • descrption:

    DIY JLH 1969 class A amplifier Board PCB Assembled MOT/2N3055 DIY kit

    Notice: Products as shown in my main picture, one channel price. so if you need stereo channels,please you buy 2pcs. thank you!

    This is diy kits
    1969 class A amplifier. While JLH 1969 is a simple design, it is still one of the best transistor amplifier.

    This incarnation features :
    1. Double-sided , thick copper PCB. Most of the JLH 1969 boards in the market are single-sided. 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 & heavy aluminum plates already mounted on the board( as in the pictures) for easy to interface with heatsink.
    Material at a glance:
    * Shen Jin-sided PCB, gold, gold Balloon
    * Import Panasonic black gold fever high frequency low-impedance capacitor
    * Import pale blue ruby capacitance
    * Import the new Motorola / 2N1711
    * Import the new Motorola / 2N2907
    * Disassemble MOT / 2N3055
    * The new ERO green film coupling capacitors
    * New Taiwan LELON axial audio output capacitance
    * Panasonic foot blister chunill low drift resistor error thousandth, sweet vocals
    * Customized industrial grade aluminum angle, fast heat transfer, corner store to buy an aluminum alloy aluminum not generally comparable
    * Lead-free solder containing silver bass / midrange has lifting effect
    Specifications:
    Operating voltage: DC 12V-35V (corresponding to 9-26V transformer)
    Output sound power: 10-15W or so.
    It can be pushed 3-8 inches, 120 watts of power bookshelf box, full-range boxes. Sensitivity to be higher than 83db.
    Board size: with angle aluminum long 10cm, width 8cm, height 3.8cm
    Adjustable between quiescent current 0.3-1.8A, recommended 1.2 Ann (radiators need more than 0.7 kg, it is recommended to listen to the sound quality, I feel satisfied to buy aluminum heat sink chassis, because to buy a separate radiator is not cheap).
    The midpoint of their own adjustments / quiescent current method:
    Tune midpoint: universal table hit voltage profile, black pen then the red pen then GND TP1 test holes (TP1 at the output capacitor positive) board, the adjustable resistance KT1 it is 1/2 of the supply voltage.
    Modulated current: 10A universal table hit stalls, a pen then positive power supply, the other one pen then VCC terminal, adjust the adjustable resistance KT2 change the current board size.

  • Package include
    100% Brand New
    1pcs DIY JLH 1969 class A amplifier Board PCB Assembled MOT/2N3055 DIY kit

SHIPPING & DELIVERY

We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:
Location *Estimated Shipping Time
United States 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
Asia 10-20 Business days
Africa 15-45 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.

REFUNDS & RETURNS POLICY

Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.

Refunds

Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:

  • If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.
  • If you received the wrong item you can request a refund or a reshipment.
  • If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.

We do not issue the refund if:

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of geeksmartbuy (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of https://geeksmartbuy.com

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.

Exchanges

If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.

There are no reviews yet

Write a Review
Super hot! Several others have checked this out in the last few hours

Diy Kits 1pcs JLH 1969 class A amplifier Board high quality PCB MOT 2N3055 with Heat sinks

US $23.76
US $27.96
Free
Selling fast: get yours before it’s gone!
View Cart
Guaranteed SAFE checkout
Worldwide Shipping

Enjoy flexible international shipping services that currently operate in over 200 countries across the world

Free Returns

Arrange your return for a full refund, we've got you covered with our full Buyer protection

Safe Payment

Buy with confidence using the world’s most popular and secure payment methods

Shopping cart

×