20世紀初頭 early 20th century

20世紀初頭の無線電信って、当時の最先端テクノロジーであると同時に、とても情緒豊かな機械をたくさん作り出していると思います。半自動電鍵が出てきたのもこの頃で、その当時の電鍵のメカニズムには魅了されるものが多いです。

I think that wireless telegraphy in the early 20th century was not only the most advanced technology of the time, but also created a lot of very emotional machines. It was also around this time that the semi-automatic morse key appeared, and many of the mechanisms of the time are fascinating.