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Yahoo Bid Home Appliances, Audio & Video, Camera Audio Equipment Amplifiers General Other
●金田式No.296ハイブリッドミッドパワーDCアンプ動作品●初段6111,出力段に最新4端子SiC-MOS SCT4013DR使用●Li-Po電池駆動●
        

正面

電源LEDは青、STBYのLEDは白

背面

側面

アンプ基板:ヒーター電源/SLOW START基板

電源制御・保護回路基板など

底面

底面カバーを外した状態

付属電源ケーブルと別売の電池類・充電器

  • Product Quantity
    : 1
  • Starting Bid
    :30,000円
  • Highest Bidder
    : kdd******** / Rating:2204
  • Listing Date
    :2026年02月06日 11時28分
  • Bidding closes on
    :2026年02月09日 18時36分
  • Auction Number
    :x1218671675
  • Condition
    :State it in the description
  • Automatic Extension
    :Yes
  • Authentication
    :Yes(Description)
  • Early Closing
    :Yes
  • Can I return the product?
    :no
  • Description
  • Q&A ()
  • Cost Estimator
  • Problem Item Response Procedur
Notes
  1. Plug-in electrical appliances are only shipped by air (shipping by sea requires commodity inspection)
  2. The remittance needs to be completed within the time required by the seller
  3. It is possible that the product can only be picked up by yourself, and the self-pickup fee is quite high, please check the page to confirm
  4. The seller's page may have a sign that it cannot trade with the agent. Please confirm the page first or contact the service staff. If the bid cannot be traded, the bid will be deleted directly by the seller. Please confirm it before making a bid.
● 2025年 1月発刊の無線と実験誌に掲載された金田明彦氏設計のハイブリッドDCパワーアンプです ●

 ◎ 2025年 4月発刊の無線と実験誌に掲載された改良版回路に沿って製作したものです。
 ◎ 市販のプリアンプでも接続できる電圧入力仕様です。
 ◎ 最大出力は8Ω負荷で片CHあたり約14W,4Ω負荷で約25Wです。
 ◎ 使用電池はリチウムポリマー電池ですが,ヒーター電源はリチウムイオン電池使用を想定しています。

 ■ 初段双3極管6111~2段目2SA606差動~ドライブ段は2SK215の電圧増幅段構成です。
 ■ 出力段は第4世代4端子SiC-MOS FETのSCT4013DR(最大ドレイン電流105A,ON抵抗13mΩ)です。 
 ■ 位相補正回路は初段管プレート間の2kΩと39PFディップマイカコンデンサ(SEコンデンサは入手困難)です。
 ■ 電源供給回路と保護回路などは一体化して1枚の基板に収めました。 
 ■ 各基板の部品配置や配線パターンは,自分なりに工夫して設計しています。
 ■ ゲイン設定の抵抗値は原設計だと15kΩですが,ゲインが大きすぎると感じたので10KΩにしています。
  
 ● アイドリング電流は設計値の150mAで安定しています。
 ● 出力DC電圧は±1mV以下(安定しています)に収まっています。
 ● 主要配線はダイエイ電線の20芯,30芯を使用しています。 
 ● 基板の配線材は信号用が0.18mmOFC素線の7本撚り,電源線などは19本撚りを使用しました。
 ● 電源キャノンコネクタは出力段±16V用に定格電流のより大きな3P,ドライブ段・ヒーター回路用には
     4Pを使用しています。
 ● ヒーター回路はアンプ電源回路から独立・分離し別系統としています。原設計の回路ではドライブ
     電源用の電池が早くへばってしまうためです。自身は大容量のリチウムイオン電池を使用していました。
 ● 本機にはドライブ電源のスロースタート回路がありますが,立ち上がりが分かるようフロントパネルに
     白色のSTNBY(スタンバイ)LEDを取り付けました。 電源ON後約15秒後に点灯します。
     電源ON時のショックノイズはほとんど感じられません。

 ○ 3Pと4PキャノンコネクタにXT60コネクタが付いた電源ケーブルを1セット付属します。
 〇 リチウムポリマー電池はドローンなど用に多種発売されていますので落札者様でご用意ください。
 〇 ご必要な方には,ほぼ新品の出力段用4,000mAH, ドライブ段用2,200mAHのリチウム
    ポリマー電池と充電器を実費の18千円で別売いたします。ヒーター電源用リチウムイオン電池
    ソニー純正4500mAHもお付けします。出力段用は100C仕様(瞬間的に容量の100倍の
    電流を供給可)で内部抵抗がかなり低く,低域再生に大きな効果を感じて使用していました。  
  
 ▲ ケースは1.5mm厚アルマイト板で自作し,大きさは幅330mm,奥行き240mmです。
     パネルは厚さ3mm,幅355mm,高さ68mmで,手作業でヘアライン加工を施しました。
 ▲ 正面・背面パネルは穴あけ加工後,レタリング文字入れしクリア塗料で仕上げしました。

 〇 自作品であることをご理解いただき,落札者様の責任にてご使用くださいますようお願いいたします。
 〇 通常のご使用での動作不調には,6カ月程度でしたら責任をもって対応いたします。

 ▲ 宅急便EAZYで発送いたします。送料は当方が負担します。
 ▲ 宅急便EAZYだと匿名配送(意味不明)になりますが,当方の情報は取引連絡で明示します。
     できれば落札者様も明示いただけると幸いです。
 ▲ 落札後24時間以内にご連絡とかんたん決済ができない方は入札をご遠慮ください。
 ▲ 落札後はすみやかに受け取り連絡入力をお願いいたします。
 ▲ かんたん決済が確認できれば,原則12時間以内に発送いたします。
 ▲ お近くの方でしたら直接の引き取りも大歓迎です。
 ▲ 悪い以下の評価が5以上ある方や,代理入札の方は入札をご遠慮ください。(入札・落札されても取り消します)
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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: ●金田式No.296ハイブリッドミッドパワーDCアンプ動作品●初段6111,出力段に最新4端子SiC-MOS SCT4013DR使用●Li-Po電池駆動●
    Notes:
    Customer service hours:
    • Monday to Friday 10:00-18:00
    Customer service hotline:
    Customer Service Email: service@letao.my