准备将4波段端馈天线的20米振子用在1:9 巴伦上。多了4米但不想截断怎么处理？ [upl-image-preview uuid=2d2e2ce3-d0b6-40b4-9998-3cca0551c321 url=https://storage.hamcq.cn/2025-04-02/1743590622-210850-2d2e2ce3-d0b6-40b4-9998-3cca0551c321.png alt={TEXT?}] 现在想一个是反向对折上去二是自然下垂求教大佬那种好或者有更好的方法请指教

[upl-image-preview uuid=5c110304-cb05-41e3-aa82-180f8dcdc192 url=https://storage.hamcq.cn/2025-04-02/1743591584-58196-image.png alt={TEXT?}]

@"BG5ELQ"#p59501 就是对折上去？

除了对折回去，自然下垂和螺旋绕圈都是计算谐振长度的。

感觉对折长度太多会有寄生电容

@"Syryia"#p59705 如果用的是裸导线的话，应该不会有问题吧

对折回去会产生寄生电容（

Help! The antenna vibrator has grown longer and I don't want to cut it off. What should I do?

准备将4波段端馈天线的20米振子用在1:9 巴伦上。多了4米但不想截断怎么处理？

现在想一个是反向对折上去二是自然下垂
求教大佬那种好或者有更好的方法请指教

BG5ELQ Is it a 50% reduction?

Besides folding back and natural sagging, both helical winding and spiral unwinding are methods for calculating resonant length.

Fold back and tie tightly.

Syryia If you are using bare wires, there shouldn't be any problems, right?

Folding back will create parasitic capacitance.

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