发报电键的演进 [复制链接]

千里共明月！

[quote=ba6qh/qrp]祝李老师以及坛内各位cwer：节日快乐！！！[/quote]
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千里共明月！

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阮兄、勾兄好，节日快乐！

1906年美国「庇露氏」直角快键是同类设计的典范。

再次长知识。

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再次长知识。

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谢谢霍兄来助威。

另一款直角快键于1907年由美籍「肯尼」氏设计并可加接拱型把手(10)让左撇子使用。

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阮兄、勾兄好，节日快乐！

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李老师可不能这样称呼小的，呵呵。

有问题问李老师，a这个部件的作用是什么，我一直没太明白

[quote=洮尔根]有问题问李老师，a这个部件的作用是什么，我一直没太明白[/quote]
若該电键接上当今业余无线电器材上，开关器在闭合状态下能让操作员腾出双手来操控手动天调或功放匹配旋钮。

但在1880年代流行于美国丶德国及澳洲的「闭路电报网络」上，报站电键定必设有开关装置(sw1和sw2)将键体与近端接点「连起」(r)或「切断」(s) 。收报一方(k2)需将该开关置于"r"档位而发报一方(k1)则要设于"s"位置。

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若該电键接上当今业余无线电器材上，开关器在闭合状态下能让操作员腾出双手来操控手动天调或功放匹配旋钮。
但在1880年代流行于美国丶德国及澳洲的「闭路电报网络」上，报站电键定必设有开关装置(sw1和sw2)将键体与近端接点「连起」(r)或「切断」(s) 。收报一方(k2)需将该开关置于"r"档位而发报一方(k1)则要设于"s"位置。

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原来如此，明白了。

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....在1880年代流行于美国丶德国及澳洲的「闭路电报网络」上，报站电键定必设有开关装置(sw1和sw2)将键体与近端接点「连起」(r)或「切断」(s) 。收报一方(k2)需将该开关置于"r"档位而发报一方(k1)则要设于"s"位置。

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为了确保联接在「闭路电报网络」上的电键开关器能在发报后即时自动回置到闭合状态，大量相关电键设计曾在1880-1910年间在美国涌现。

又学习了 其实也就是有线发报通信中的运用
另外李老师能否讲解一下最早臭虫的发明
是解决了四路闭合电路中的“啾啾声”？

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又学习了 其实也就是有线发报通信中的运用
另外李老师能否讲解一下最早臭虫的发明
是解决了四路闭合电路中的“啾啾声”？

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when the armature of a neutral relay in an early quadruplex telegraph system around 1870s is attracted by the full current strength and a reversal of the current takes place, that armature momentarily falls away from the front stop with the likelihood of producing a “kick” or false signal in the local sounder. such kicks were called “bug”.

semiautomatic transmitting keys came into being around 1904 but such keys were nicknamed as “bug” commencing from 1908 when quite a lot of telegraphers manoeuvred the said keys improperly over the landline circuits making the sounder clicks erratically.

semiautomatic key does not resolve the "bug" (false signals) arising from the early quadruplex telegraphy. they are not interrelated.

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when the armature of a neutral relay in an early quadruplex telegraph system around 1870s is attracted by the full current strength and a reversal of the current takes place, that armature momentarily falls away from the front stop with the likelihood of producing a “kick” or false signal in the local sounder. such kicks were called “bug”.
semiautomatic transmitting keys came into being around 1904 but such keys were nicknamed as “bug” commencing from 1908 when quite a lot of telegraphers manoeuvred the said keys improperly over the landline circuits making the sounder clicks erratically.
semiautomatic key does not resolve the "bug" (false signals) arising from the early quadruplex telegraphy. they are not interrelated.

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i have read the origin of the word "bug"
but there are some parts which i can't understand fully

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when the armature of a neutral relay in an early quadruplex telegraph system around 1870s is attracted by the full current strength and a reversal of the current takes place, that armature momentarily falls away from the front stop with the likelihood of producing a “kick” or false signal in the local sounder. such kicks were called “bug”.....

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thomas edison cured the "bug" (false signals) in 1907 by means of circuitry enhancement.

半自动电键亦叫快键其结构能制造连串短脉冲(点子)但长划的持续度由报手操控。「点子串」除可由纯机械起振外亦可由电磁器件促振。附图显示美式1902及1915年电磁式快键。

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i have read the origin of the word "bug"
but there are some parts which i can't understand fully

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来自1870年代四路多工电报体系内非极性继电器受逆流引致的虫鸣声与1908年快键新手所造成的点划不分鸣叫声是两码子事，不能混为一谈。以两种弊端而言前者利用电桥整流器即能改善而后者报手只要勤加练习便可消弭。

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来自1870年代四路多工电报体系内非极性继电器受逆流引致的虫鸣声与1908年快键新手所造成的点划不分鸣叫声是两码子事，不能混为一谈。以两种弊端而言前者利用电桥整流器即能改善而后者报手只要多加练习便可消弭。

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谢谢李老师的解释

这种电磁式快键也是类似电铃的原理吧？图上部件24是否就是控制电路振荡的常闭触点？我曾经用继电器做过类似的试验，但吸合过程有个延迟的问题无法解决。

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这种电磁式快键也是类似电铃的原理吧？图上部件24是否就是控制电路振荡的常闭触点？我曾经用继电器做过类似的试验，但吸合过程有个延迟的问题无法解决。

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电磁式快键的主要缺点是体积大、质量重、须外接电源、‎衔铁嘈吵、调节程序繁复、键控迟缓等等。报务历史昭示了商业高速报手们只选用结构简单、易调的纯机械式快键作为他们紧密合作的专业仪器。

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电磁式快键的主要缺点是体积大、质量重、须外接电源、‎衔铁嘈吵、调节程序繁复、键控迟缓等等。报务历史昭示了商业高速报手们只选用结构简单、易调的纯机械式快键作为他们紧密合作的专业仪器。

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谢谢李老师回复。我又仔细看了一下上面的图纸，可能是我当时的结构造成的延迟问题，当时用的继电器非高灵敏型，臂较短而且硬需要较大的吸合电流。下次有机会我会再做新的试验。