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Yahoo Bid Home Appliances, Audio & Video, Camera Audio Equipment Amplifiers Tube Amplifiers Main Units
300B第1弾、ファインメットOPTも可、300B最高動作シングルアンプ,真空管別
 
        

標準型

タムラトランスと角形OPTの比較

武末アンプ回路

新型の内部

貫禄のタムラOPT

至高の超大型ファインメットOPT

  • Product Quantity
    : 1
  • Starting Bid
    :175,000円
  • Highest Bidder
    : zuuex / Rating:20357
  • Listing Date
    :2026年01月18日 21時18分
  • Bidding closes on
    :2026年01月19日 04時14分
  • Auction Number
    :e1178937912
  • 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. Plug-in electrical appliances are only shipped by air (shipping by sea requires commodity inspection)
オクのシステム変更で納期は8日以上選択できませんが、完成まで30日程度かかります。

なんと本家ウエスタンエレクトリックの300Bが市場に出回り始めました¥決して高価でもありません、当然初ロットは瞬時に完売、半年以上待たないと入手は無理のようです。

あらゆる部品が値上がりと供給不足が続き、本機のような受注生産品は納期が長くなり、変更されたオークションの規定だとせっかく落札しても自動キャンセルになる場合があります。
また電気に詳しくない業者が転売している場合がありかなり危険です。

300Bを最高の状態と、安全な状態で動作するアンプです。
フルスペックで使用したアンプと言えば40年ほど遡ったステレオギャラリーQや武末一馬氏のアンプを語らない訳にはいきません、最大定格の450Vをかけ固定バイアスで15Wもの出力があります。
その後300Bが庶民に出回り貴重な球を温存するため400V弱のB電圧、自己バイアスで8W程度が常識化、これはWE91に似た動作です。
 
 しかし近年多種の300Bが登場しフルスペックの動作でも長時間安定動作ができそうな物も登場しています、高価な高槻300Bや比較的安価なエミッションラボ300Bです。WE300Bに最も近いのはセトロン300Bですがこれも高価になってしまいました。
 
 形状は異なるが音質が非常にWE300Bに似たエミッションラボを選択する方も増えております。
 300Bフルスペックだとバイアス電圧は100V以上、これを楽にスイングするには200V以上の信号が必要。温存動作のWE91では電圧利用率の高い5極管(WE310A)2本用いてなんとかしてますが、フルスペックの武末アンプではドライバ3極管に600V以上の高圧をかけて100V以上のスイング電圧を得ています、当然ドライバ管の寿 命も問題になります。
 
 当方がパラシングルアンプでも採用したスーパー3極管方式は、ドライバ管の負荷を抵抗(供給電圧以上のスイングは得られない)でなくチョーク(供給電圧を中心にスイングする)にすることでこの問題を一気に解決し、おまけにドライバとプリドライバも直結でき音質に問題があるCRも無くすことができました、抵抗の数千倍のコストのチョークを使うのですから当然の利益でしょう。
 
本機はフルスペックモードとWE91の温存モードをスイッチで切り替えることができ全ての300Bに対応します、両CH独立した電流計で動作状態が一目で判り安全です。
 
球は全て別売り、300B以外に6SN72本、5U4G1本必要です。
 出力トランス標準は合わせカバーです、(角型はオプション)、さらにでタムラも選択できます、超高価なファインメットも選べます。
¥はIDのあとに@yahoo.co.jpを付けてメールください。

 
高価なWE300AやWE300Bを恐る恐る自己バイアス(信号の帰路に抵抗やコンデンサが入る)で使うよりロシアや中国製を伸び伸び動作させる方が音がよいです。


(2020年 1月 8日 23時 41分 追加)
オートグラフを駆動できるかとの質問がありました、オートグラフはスペック以上に能率が高く300Bだけでなく出力の小さい2A3でも楽に駆動できます。 逆にハイパワーアンプだと苦手な小出力領域での駆動なので高音質にならない場合があります。
The product has been closed, and you cannot ask questions.
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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: 300B第1弾、ファインメットOPTも可、300B最高動作シングルアンプ,真空管別
    Notes:
    Customer service hours:
    • Monday to Friday 10:00-18:00
    Customer service hotline:
    Customer Service Email: service@letao.my