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ナショナル 真空管ラジオ GX-240 外部入力あり 整備品,ハム音対策済み#H
        

  • Product Quantity
    : 1
  • Starting Bid
    :1,000円
  • Highest Bidder
    : goo******** / Rating:1358
  • Listing Date
    :2026年04月02日 14時27分
  • Bidding closes on
    :2026年04月09日 20時23分
  • Auction Number
    :j1225099584
  • 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. Radio-related products have commodity inspection issues. If you confirm that the product is for personal use, you can place a bid to purchase it.
ナショナル 真空管ラジオ
モデル名 GX-240 
ラジオの種類 トランスレス 5球スーパー
MW(中波)/SW(短波)2バンド

整備済み
受信MW(中波)/SW(短波)受信良好、ボリューム交換
Bカーブを代用し疑似Aカーフとしているため極小さな音量が得意ではありません
ハム音対策、ハム音は少ないです
ボリュームガリなし(交換)
外部入力あり(左側面),ボリュームで調整可
外部入力用トランスは絶縁2000MΩ以上/1000V1分間の耐電圧テスト済み

■商品の構成
 ①ラジオ本体
 ②アンテナ線3m程(片端クリップ付き)
 ③修理後の回路図


★整備後、動作を確認してから出品していますので
電源が入らない(何も受信できない)以外は
ノークレームにてご了解頂ける方、
商品の性質をご理解できる方のみ入札ください

●概要
・シャシーは商用線(AC100V)と導通しています
・イヤホンジャックはAC100Vと導通しているため撤去しています(安全のため)
 代わりに外部入力ジャックを設置
・受信MW(中波)/SW(短波)受信良好、
 MWバンドはバーアンテナのためある程度受信/SWバンドはワイヤーアンテナ必須、
 付属のアンテナ線を背さ属して使用します
コンディションが良ければ日中のラジオ日経や韓国などの放送が受信できます
・サイズ  幅 34x 高さ 15x 奥行11.5cm程、ツマミ等突起物含まず
・ハム音は少ないです(※同調ハム音を除く)
・使用真空管 テスト済み
  12BE6- 12BA6- 12AV6 - 30A5/35C5(現品は30A5) - 35W4
・前面左下のイヤホンジャックは撤去し
 代わりに外部入力用3.5mmステレオジャックを取付
 背面のPH端子は中継用端子として使用
 絶縁とインピーダンスマッチング用トランスを介在させています
 3.5mmステレオジャックは内部で直列抵抗挿入後LR結合、モノラル再生
 
 スマホなど充電中に接続すると音にノイズが入る場合があります
鉄筋住宅などでは電波が遮断されてうまく受信できない場合があります

★AM(MW)波停波の情報がありますが、
 外部入力(3.5mmステレオジャック)を利用して
 スマホ、FMチューナー、Bluetooth等接続し、モノラルアンプとして使用できます
 
■現品の状況
 ●外観 (詳細は画像を拡大して御確認ください)
・ ケース内外を洗浄、ダイヤルパネルも外して洗浄
 ケース上面の左方に貫通割れがあったため亀裂を接着、裏面から亀裂付近の補強
 その他、ケースには貫通割れはありませんが細かい傷はあるものと思ってください
・ダイヤルパネル固定ビスは4本とも交換

 ●回路/内部(整備内容等)
・電解コン交換、ACコン交換、ペーパーコンはフィルムコン等に交換
・ハム音対策:電解コングランドリターン線、電源フィルターCR1段追加
電源ランプはLED化、ランプの点灯回路を整流管のヒータータップから分離(整流管の保護)
・500kΩボリュームは残留抵抗が大きく音を絞れないため交換、Bカーブを代用(疑似Aカーブ)
・イヤホンジャックは配線を撤去,外部入力ジャックに換装
・バリコン支持ゴム代替品に交換、バリコン軸受部グリス塗布
・ダイヤル糸交換
・ACコード,FUSE,交換
 アンテナリード線は3mクリップ接続,
・IFT調整,アンテナ同調確認
周波数範囲調整/確認,コールドスタート時のドリフト確認

※同調ハム音について(同調した時にハム音が大きくなる現象)
 同調ハム音は選局、同調した放送局の電波と電灯線が干渉して起きる電波障害の一種です
 ラジオ側に原因ではない場合が多い
 緩和するためには
 バーアンテナのラジオは電波が少し弱くなる方向に変えてみる
 ワイヤーアンテナの場合アンテナを短くする等が対策です



(2026年 4月 3日 14時 47分 追加)
●●誤記訂正
誤--->・受信MW(中波)/SW(短波)受信良好、
 MWバンドはバーアンテナのためある程度受信/SWバンドはワイヤーアンテナ必須、
 付属のアンテナ線を背さ属して使用します

正--->MW中波,SW短波共空芯コイルのためワイヤーアンテナ必須
    付属のアンテナ線をクリップ接続して使用します
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   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:
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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.
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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.

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"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."

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Important Notes:
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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: ナショナル 真空管ラジオ GX-240 外部入力あり 整備品,ハム音対策済み#H
    Notes:
    Customer service hours:
    • Monday to Friday 10:00-18:00
    Customer service hotline:
    Customer Service Email: service@letao.my