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Yahoo Bid Home Appliances, Audio & Video, Camera Electronic Components Printed Circuit Boards (PCB)
◆◇自作・TPA6120A2電流帰還型ステレオヘッドホンアンプ基板◇◆
 
        

添付付属品

  • Product Quantity
    : 1
  • Starting Bid
    :1,000円
  • Highest Bidder
    : ひろさん / Rating:268
  • Listing Date
    :2026年01月15日 15時51分
  • Bidding closes on
    :2026年01月16日 20時26分
  • Auction Number
    :p1216049983
  • Condition
    :New product
  • Automatic Extension
    :No
  • Authentication
    :Yes(Description)
  • 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.
◆◇自作・TPA6120A2電流帰還型ステレオヘッドホンアンプ基板◇◆
商品説明電流帰還型IC TPA6120A2を使用した自作ステレオヘッドホンアンプ基板の
完成品、動作確認済み製品です。
長期保管品のため、現状渡し扱いにてご了承頂ける方の入札をお願いします。
*特長*
・入力ステージは、デュアルオペアンプをベースにした電流帰還型と電圧帰還型
 両方の複合回路
*注記
・デュアルDC±5V~DC±15V(Max)にて動作(推奨動作電圧:DC±12V)
・省スペース向け小型基板サイズ(62.5mmX38mm)
・オペアンプでは得られない広範囲なヘッドフォン・インピーダンスに
 適合するドライブ能力 (推奨:音圧レベル88dB以上32Ω~300Ω)
デュアルオペアンプはお好きなオペアンプに換装可(丸ピンICソケット使用)
 基板動作確認用として低雑音オペアンプ ローノイズ選別品 NJM2068DD実装済
 *注記:BURR-BROWN APPLICATION BULLETIN(sboa002.pdf)を
 参考に電流帰還型と電圧帰還型両方の設計長所を活かした複合回路です。
 https://www.ti.com/lit/an/sboa002/sboa002.pdf?ts=1768461050269
 また、使用するオペアンプにより数mV程度のDCオフセットが発生しますが
 問題になるレベルではございませんのご了承ください。
*仕様*
・基板サイズ:62.5mmX38mm 材質:FR4 両面基板厚さ1.6mm
オペアンプ:日清紡マイクロデバイス製NJM2068DD ローノイズ選別品
・ヘッドフォンアンプ:TI製TPA6120A2 放熱器添付有り
・動作電圧範囲:デュアルDC±5V~DC±15V(Max)
・静止電流:≒±31mA@±12V
*参考特性*
テスト条件:±12V、周波数1KHz、抵抗負荷68Ω、裸基板(ケース無)状態時
・出力:≧500mW@THD1% ≧400mW@THD0.1%
・歪率:≦0.3% 出力1Vrms
・ゲイン:8dB(2.5倍)
・S/N:≧70dB
・クロストーク:≧-84dB
・左右バランス:0.3dB以内
・周波数特性:15Hz~75kHz@-3dB
・残留ノイズ::≦14uV@80kHz帯域制限時
◎参考特性値は作成当時のデータです。
 本アンプの特性を保証するものではございません。
完成基板1枚付属品送料込み価格です
注意事項送付は、完成動作基板付属品のみです。
 付属品は写真に示した物となります
 機構部品、デュアルDC電源などは落札者様側にて用意する必要があり、
 また、半田付けも必要となります。
回路図添付有り
詳細マニュアルが有りませんので回路情報だけで作成できる方
 の入札をお願いします。
・落札後、お取引開始(取引ナビ連絡)は、24時間以内にお願いします。
・落札後のお支払い手続き、受け取り連絡に日数のかかる方は入札ご遠慮ください。
・自作品のため落札後のクレーム・返品・キャンセルはお受けできません。
・商品の取り置きはいたしません。
・写真は、一部使い回しをしております。
・ご不明な点は、質問からお問合せ下さい。
発送詳細クリックポストにて発送
・他の発送方法のご要望には対応致しません。
・お届け先ポストへ投函されます。
・追跡番号は、取引ナビにてご連絡します。(土日・祝日も配達されます)
・発送は、月曜から土曜日の午前中を予定しております。
日曜および祝祭日の発送はお休みです。
・梱包箱及び緩衝材は、リユース(再利用)品を使用する場合が有ります。
支払方法Yahoo!かんたん決済
こちらの商品案内は 「■@即売くん5.90■」 で作成されました。

The
この他にも出品しておりますので宜しければご覧ください。


The product has been closed, and you cannot ask questions.
Question list
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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
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: ◆◇自作・TPA6120A2電流帰還型ステレオヘッドホンアンプ基板◇◆
    Notes:
    Customer service hours:
    • Monday to Friday 10:00-18:00
    Customer service hotline:
    Customer Service Email: service@letao.my