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Yahoo Bid Home Appliances, Audio & Video, Camera Electronic Components Printed Circuit Boards (PCB)
正負 安定化電源 ±2電源 サンケン ダーリントンパワートランジスタ1組付き
 
        

  • Product Quantity
    : 2 / Remaining:2
  • Starting Bid
    :1,000円
  • Highest Bidder
    : / Rating:
  • Listing Date
    :2026年01月07日 22時51分
  • Bidding closes on
    :2026年01月12日 22時51分
  • Auction Number
    :b1208930598
  • Condition
    :New product
  • Automatic Extension
    :Yes
  • Authentication
    :No
  • Early Closing
    :Yes
  • Can I return the product?
    :no
  • Description
  • Q&A ()
  • Cost Estimator
  • Problem Item Response Procedur
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.
正負 安定化電源 ±2電源 サンケン ダーリントンパワートランジスタ1組付きです。

1枚の基板に2回路分ありますので、ミシン目で切ってお使いください。
もともとは、MC・MMイコライザアンプ(特許出願中)用の電源として、LEDを基準電源
とし作ったものですが、乗数を変更して±50Vの電源としても使ってます。
乗数を変更すれば割と何でも使えますし、こんな汎用のものをユニバーサル基板で
作る気がおきません。

1588(ダイオード)のシルクは誤記で、HZ6やRD6等の500mWクラスのツェナーダイオードです。
誤差アンプは2SC2240、2SA970を使いました。
整流ダイオードは31DF2のリード径にスルーホール径を合わせてあります。
お好みのデバイスでお使いください。
特にお勧めは別で出品しておりますV19Eが超高音質です。

出力のデバイスはパワーMOSが使えますが、バイポーラの場合はダーリントンTrを
推奨します。おまけのトランジスタは、テスト用ですのでランクは色々です。
最終的には好みのデバイスをお使いください。

大きいコンデンサはニチコンFW 3300uF/63Vです。
同一規格品がヤフオク内で多数出品されております。

CRDと書かれたものは、J-FET(パターンはNch、Pch)ですが、負電源側はPchをNch
に変更可能。その場合は、NchFETの足をチョイチョイと変更してください。

VRは右回りだったか左回りだったか、忘れましたが、ご愛敬で。

LEDは東芝の高輝度ではない緑φ3が音質、ノイズともに良好でした。

回路が分かる方の入札をお願いします。
一応、LTSPICEで描いた図面、説明文は紙で添付します。
この基板を設計した頃は、簡易CAD(MBE)でやってましたので別で出品して
おります(LM3886基板セット)のような3Dデータはありません。
実装状態の写真の赤枠内をご参照ください。

NC・NRでお願いします。

いたずら入札が増えた関係で申し訳ありませんが、落札後2日程度を目安に連絡できる
方の入札をお願いします。遅くなる場合は一報いただけたら幸いです。
※評価の悪い方、取引に不安を感じる様な方は、こちらの判断で消去させていただく
事がございますので予めご了承ください。

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Question list
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After the seller responds, the original page will display the question
Product Price JPY
Japanese Consumption Tax(10%) JPY

A 10% consumption tax is applied to goods and services in Japan. The price may include the tax or it may be added separately. Please check the price details when ordering.

Note: This is a domestic sales tax applied within Japan.

Japan Local Shipping Fee JPY Japan Local Shipping Fee Reference
Product Weight KG The maximum weight limit is 30 kg
International Shipping Methods
Singapore Package Import: Customs and Tax Policies
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-holdings.com 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: 正負 安定化電源 ±2電源 サンケン ダーリントンパワートランジスタ1組付き
    Notes:
    Customer service hours:
    • Monday to Friday 10:00-18:00
    Customer service hotline:
    Customer Service Email: service@letao-holdings.com