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Western Electricの技術を継承したLangevin 413A MC昇圧トランス.
        

  • Product Quantity
    : 1
  • Starting Bid
    :100円
  • Highest Bidder
    : 兼次 孝旨 / Rating:267
  • Listing Date
    :2026年05月03日 09時44分
  • Bidding closes on
    :2026年05月10日 21時41分
  • Auction Number
    :o1228667053
  • Condition
    :Damaged and stained (specify in description)
  • Automatic Extension
    :Yes
  • Authentication
    :No
  • Early Closing
    :Yes
  • Can I return the product?
    :no
  • Description
  • Q&A ()
  • Cost Estimator
  • Problem Item Response Procedur
Western Electricの技術を継承したLangevin 413A MC昇圧トランス
商品説明
Langevin社の入力トランス413Aを使用したMC昇圧トランスの出品です。

LangevinはかつてWestern Electricのライセンス生産を行っていたことでも知られ、その音質はWE直系の濃厚さと、現代のトランスにはない深い音楽性を兼ね備えています。
そのトランスは、現代でもヴィンテージオーディオ愛好家の間で非常に高く評価されています。

特に413Aは、同社の入力トランスの中でも「決定版」の一つとして数えられる名機で、Western Electricの流れを汲む、密度が高く芳醇なサウンドキャラクターで知られています。
プリアンプの入力用として設計された非常にクオリティの高いトランスで、MCカートリッジの微細な信号を余すことなく増幅する昇圧トランスとして最高の相性を誇ります。

現代のトランスが「フラットで正確」であることを目指すのに対し、413Aは中低域に独特の粘りとエネルギー感を与えます。
私は主にOrtofon SPUとDL-103で鑑賞しておりますが、特にこのような中低域に芯があるカートリッジと組み合わせると、力強く音楽性の高いサウンドになります。
ボーカルや弦楽器の質感が非常にリアルで、高域はシルクのような滑らかな質感です。
空間表現に関しては、音が平面にならず、臨場感を伴って立ち上がってくるのが特徴です。

ステレオで使用する場合、製造時期が近いなど2つのトランスのペアリングが理想的ですが、希少なヴィンテージアイテムとなった現在では難しいことはご理解頂けると思います。
出品のトランスに関しては、注意深く聴き込みましたが、僅な差も確認出来無いとは言い切れません。
個体差が気になる方は入札をお控えください。
トランスの外観には、ヴィンテージ品につき経年相応のスレや小傷があります。

413Aの回路図に関する資料が有りましたので、画像をご参照ください。

出品の昇圧トランスは、「ぺるけ」さんのHP「情熱の真空管」に掲載されている回路・説明を参考にして作成致しました。

www.op316.com/tubes/vinyl/mct-1.htm
www.op316.com/tubes/vinyl/mct-0.htm
www.op316.com/tubes/vinyl/mct-test.htm

ライン用トランスを微小信号のMC昇圧に使うと、二次側(フォノイコライザー側)の負荷インピーダンス(通常47kΩ)との兼ね合いで、高域にピークが出たり、逆にロールオフしたりすることがあります。
必要に応じて、トランスの二次側に抵抗やコンデンサを並列に入れ、インピーダンスを補正(ダンピング調整)することで、周波数特性をフラットに整える作業が推奨されます。

上記の二次側抵抗回路に関しては、必要に応じてトグルスイッチでON/OFF出来る様にしています。
トグルスイッチをツマミ側に倒すことで回路が有効となります。
抵抗値は可変抵抗Bで0~100kΩの範囲で設定可能です。

昇圧比は下記の内容で設定しております。
切替スイッチで変更可能です。
 Lo側  75Ω:50000Ω 26倍
 中央 150Ω:50000Ω 18倍
 Hi側 600Ω:50000Ω  9倍

配線材 : 国内メーカー製 UL1007 AWG24/22
半田 : KR-19RMA
RCAジャック : Switchcraft 3505F

ヴィンテージパーツを使用していることをご理解の上、入札をお願い致します。
個人の出品につき、ノークレームノーリターンにてお願い致します。
こちらの商品案内は 「■@即売くん5.90■」 で作成されました。

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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: Western Electricの技術を継承したLangevin 413A MC昇圧トランス.
    Notes:
    Customer service hours:
    • Monday to Friday 10:00-18:00
    Customer service hotline:
    Customer Service Email: service@letao.my