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MFJ-1786 マグネティックループ 10-30MHz アンテナ
        

本体表

本体裏 アルミ取付金具

内部 同調コンデンサ部

内部 整合部

コントローラーとAcアダプタ

コントローラ背面

取付金具

  • Product Quantity
    : 1
  • Starting Bid
    :3,000円
  • Highest Bidder
    : raptor / Rating:341
  • Listing Date
    :May 10, 2026 10:19
  • Bidding closes on
    :May 17, 2026 20:58
  • Auction Number
    :u1229413755
  • 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
Notes
  1. Radio communications related products (import and export documents required) cannot be assisted in importing.
    If the seller's evaluation is less than 10, there is a high risk of fraud. If you need to bid, please confirm that it is a trustworthy seller and leave a message telling the product ID to join the bidding for you.
  2. Freight charges cash on delivery
  3. The seller does not provide return compensation and other responsibilities
  4. 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
  5. The product location is far from the overseas delivery address (Kanagawa), please pay attention to the Japanese shipping fee
  6. Please note: Sellers with a rating lower than 50 or an overall rating lower than 98% cannot provide compensation for non-arrival of goods. Please choose a reputable seller.

MFJ-1786 マグネチックループアンテナ

+★+ +★+ +★+ +★+ +★+
MFJ社はなくなり入手が難しい一品になります。
小型で直径わずか90cmのループながら10~30MHzを連続カバーできます。
アパマンハムやフィールドに於ける移動運用に如何ですか。

中古ですので傷、汚れはあります。アルミのループ部分はテナコートでコーティングしています。内部の写真も撮りましたので参考にして下さい。

送信は部屋の中で怖いので行っておりませんが、部屋の中で受信機に接続しコントローラのUP,DOWNで10MHz-30MHzにてザー音やSメータの振れで同調していることを確認しました。
整合については、設置場所などにより大きく変化すると思います。
整合調整は必要ないのですが内部の同調ループの形などで最良点を見つけている海外局の例があるようです。

 飛びに関しては環境次第になりますが以前に当方が自作したマグネティックループではフルサイズのDPより劣りますが、モービルホイップより格段に良かったです。
受信についてはさすがにループアンテナです非常にノイズが少なくSNが良かったです。

リモートコントローラーを使ってシャック内から同調バリコン用モーターを駆動しますが
電源線は同軸ケーブルに重畳するので専用コントロール線は不要です。
アンテナ用のアースは不要です。

アンテナの取付は垂直、水平どちらでもOKですが接続金具は写真の物になりますので工夫してマストに取り付けて下さい。
アンテン本体につけてあるアルミ金具は脱着できます。このアルミ金具は水平取付の時に使うよです。長いインチネジと金具、及び新品のUボルト2個を付けておきますので工夫してみてください。

屋外で使用するには周りのすき間をテープでふさいだ方が良いと思いますが海外の使用例見ますとそのまま使用していることが多いようです。

お送りする物:
アンテナ本体、コントローラ、専用電源アダプタ、取付金具
写真にはありませんが英文説明書(コピー)

梱包は簡易梱包になります。
サイズはたぶん220cm-240cm程度になると思います。
200サイズにおさまらないので匿名配送ではありません。
佐川急便を使用する予定です。
送料は一律といたします。不足分は当方が持ちます。
また、手渡しでも良いです。

周波数:10~30MHz (連続可変)
アンテナ径:直径91cm
最大許容電力:150WPEP
アンテナ重量:約5.3Kg
コントローラ電源:電源アダプタ(100V)使用

簡易動作確認のみですので、ノークレーム・ノーリターンで願います。


以上
+★+ +★+ +★+ +★+ +★+

+ + + この商品説明は オークションプレートメーカー2 で作成しました  + + +
No.110.004.004



(2026年 5月 11日 14時 41分 追加)
送料ですが近県だと設定している金額だと割高になります着払いでもお受けします。
送料表示0円になっていますが実質送料着払いになります

 
7MHzで使用するには同調コンデンサの容量を150PF程増やす必要があります。
高耐圧10KVとかのコンデンサをパラに接続し実現できるようです(海外の記事から)
しかし同調点の調整はかなりシビアになるようです。自己責任で実験してください。
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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
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: MFJ-1786 マグネティックループ 10-30MHz アンテナ
    Notes:
    Customer service hours:
    • Monday to Friday 10:00-18:00
    Customer service hotline:
    Customer Service Email: service@letao.my