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Yahoo Bid Home Appliances, Audio & Video, Camera Electronic Components Printed Circuit Boards (PCB)
【TR付・基板】高出力(80W) モノ・アンプ基板・製作キット  

  • Product Quantity
    : 1
  • Starting Bid
    :2,690円
  • Highest Bidder
    : Shown on original page
  • Listing Date
    :2025年04月19日 22時02分
  • Bidding closes on
    :2025年04月26日 22時02分
  • Auction Number
    :k1136085407
  • Product Condition
    :New product
  • Automatic Extension
    :Yes
  • Authentication
    :No
  • Early Closing
    :Yes
  • Can I return the product?
    :no
Notes
  1. The import of electronic parts requires relevant certificates, such as: IC, capacitors, transistors, power supplies... and other electronic related parts (such as motherboards, power transformers), and we cannot assist you in importing.
  2. Batteries are considered dangerous goods under international shipping regulations and cannot be shipped.
 出力80W程度のディスクリート・全段直結アンプ基板製作のためのパーツセット。出力コンプリ(2N3055&MJ2955)は付属しますが放熱板は含みません。基板はモノラルなのでステレオには2枚必要。正電源、負電源を用い差動入力・全段直結回路なので入力段のコンデンサをバイパスすれば直流アンプになります(要ゼロ調整)。抵抗値など若干印刷と異なる部品(50Ω->51Ω等)もありますが、回路はほぼ基板印刷のまま、実体図に合わせて部品をハンダ付するだけなので製作は容易です。又、セットには使用範囲を広げるため、以下の部品が追加されています;

1)±7.5V(ヒータトランス整流値)、±15V(バッテリー充電用トランスなど)、±25V(初期のTRアンプで用いられた)電源使用のためのクロスオーバー歪補正抵抗。
2)PA用途でなく室内でクラシックなどを聴く場合にNF値を大きくできる負帰還用の代替抵抗。
3)同一基板で別途出品の10Wアンプにするための変更用回路図&説明。

■主な部品は以下のとおり;
1) アンプ基板(モノ): 75mm x 105mm, 1.0mm thickness single layer.
2) 出力コンプリ 2N3055 + MJ2955 (各1個)
3)出力コンプリ接続コード(六色)
4)出力コンプリ取付用具、絶縁マイカ、ネジ、卵ラグ等
5)オペアンプ:UA 741
6)ドライバ段、コンプリ:BD139 + BD140
7)抵抗、コンデンサー、ダイオードなどの基板製作部品
8)回路図・実体配置図

 付属出力コンプリは写真のもの(2N3055とMJ2955を各1個)ですが、試作基板で試したところでは他のコンプリでも電源電圧・放熱・クロスオーバー歪などを
微調整すれば動作するようです。面白いところではフェアチャイルド社のSS8550&SS8050(ピン接続がCBEなので直接基板に接続できる)でも(放熱は必須!)ちゃんと2Wの出力が得られました。TO-92のあのボディで2W出るんですから、全く驚きです。簡単な回路の割には音も悪くない。お手持ちにパワー・コンプリがある方はぜひお試しあれ、とは言っても動作は保証の限りではありませんが。基本、ディスクリートなので回路・部品変更の自由度が高く、修理も容易、トランジスタ・アンプ入門・回路学習に適したキットです。

送料は定形外・クッション封筒、当方のID及び取引に関する詳細は以下のURLを参照して下さい。
https://systemynt.blog.fc2.com/
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Question list
All replies from original sellers (total number of questions: items)
After the seller responds, the original page will display the question
Product amount JPY
Consumption tax (10%)
Estimated local shipping fee JPY
Product forecast measurement table kg(Product forecast weight table)
International Freight Methods

Notes:

  • Compare the actual weight with the volume weight, and the larger one will be the billing weight
  • Volume weight (KG) = length (L) (cm) X width (W) (cm) X height (H) (cm) / 5000
  • Common volume weight products: furniture, fishing rods, car parts...
  • A "consolidation handling fee" (price list)
    
Proxy bidding and purchasing services are becoming increasingly convenient. However, overseas shopping carries certain risks and issues. To reduce these risks and enhance shopping safety, please be sure to read the following information:

1. International Shipping

   Air Freight: If the item status is not confirmed within two days after the arrival notice, any customer complaints cannot be addressed with the seller.

2. After Receiving the Product

Please confirm and inspect the product as soon as possible to ensure that the product specifications, quantity, accessories, and description are correct

If, unfortunately, there are any issues, you can refer to the following examples on how to report related product problems:
1. Example of missing product information
2. Example of product not matching provided information
3. Example of damaged product information

Important Notes: 1. If the seller is unwilling to ship overseas or is unaware that the product will be shipped overseas, the international shipping cost for returns or exchanges will need to be borne by the member. You may refer to the EMS e-Express fee inquiry from the post office. If it involves alcoholic beverages or items that affect flight safety, the post office cannot be used for shipment, and only DHL can be used to ship back to Japan.
2. During the product complaint handling period, please retain the complete outer packaging of the product (including the shipping label information), and refrain from attempting any repairs or altering the original condition. Any modifications may result in the inability to process the case.

3. After Inspecting the Product

After receiving and inspecting the item, if you have any questions, it is recommended to contact Letao within 2 hours. Here are some reminders:

1. Please do not unpack, use or repair the received item yourself, and be sure to keep the original packaging to facilitate subsequent handling of related matters, so as to avoid changes to the item that may cause the seller to be unwilling to process.

2. You can call customer service, and the customer service will leave a message for you as below. Please provide the following information:
"Hello, we will first help you establish a complaint case for Product ID: _______ .But we need you to 2-3 clear photos of the product issue, including photos of the product problem, product packaging, shipping details slip, and outer box. Send them to service@letao.my and inform us of your desired resolution (failing to provide this may result in an inability to process subsequent matters). After sending the email, notify us in the customer service message. We will confirm with the seller as soon as possible. and if there are any related questions, we will contact you through the customer service message. Thank you for your cooperation."

Please provide:
1. "Product ID"
2. Photo of the "Delivery Note" (if any)
3. Photos of the outer box (including inner and outer packaging)
4. Photos of the product (Please include relevant descriptions to help us confirm with the seller)

Important Notes:
1. Do not include foreign text or other products in the background of the image.
2. Please keep the complete product packaging (including the shipping label information), and refrain from repairing or altering the original condition on your own, as any changes may result in the case being unable to be processed.
3. Please provide the relevant information within 48 hours to avoid missing the golden hour for reflection and causing situations that cannot be handled.
4. Due to 99% of Japanese sellers being unwilling or unaware of shipping goods overseas, if a seller is willing to handle the issue, the goods must be sent back to Japan, and the international shipping costs incurred must be borne by the member. Letao will use postal EMS international express to send the goods back to Japan.
5. As the goods are purchased from overseas, it may take approximately one to two weeks to complete the relevant processing procedures when issues arise with the goods. Please be reminded that you can inquire about the approximate cost through the EMS service at the post office.

4. FAQ

1. Issue of Authenticity: If antique or branded goods are found to be counterfeit upon receipt, clear photos showing the differences between the genuine product and the imitation must be provided as evidence. If unable to provide relevant proof, assistance can be sought to find a third-party reputable organization for a premium authentication service .
2. Leaking Iron Teapot: If an antique iron teapot is leaking, please take clear photos of the leaking area and provide them.
3. Transport Damage: If the goods are damaged during international shipping (to the pickup point), you need to provide photos of the outer packaging of the parcel and clear photos of the damaged goods' outer packaging.

※ Note: Photos provided to sellers should not contain any foreign-related information.
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    Product name: 【TR付・基板】高出力(80W) モノ・アンプ基板・製作キット
    Notes:
    Customer service hours:
    • Monday to Friday 10:00-18:00
    Customer Service Email: service@letao.my