級間鑽孔器

裝級間；最重要的利器；打動器，也可以用在管機上
身為超級DIY，怎能缺少的一帖呢!

其實我想要有一間木工廠；這是是美好的。



說實在，級間盒裝在這鋁盒；實在不怎麼好看
我想+點木頭質感於鋁盒二側。

美國軍規 CTG 0.5W 精密線繞電阻

從下圖可看出精密線繞電阻, 是用鎳鉻電阻絲繞製而成, 結構要比一般薄膜電阻好. 電阻絲直接焊在引腳上. 不用端帽壓合, 接觸也最佳. 所以聲音當然會比較甜美細膩.

 

電阻中最甜聲的就是精密繞線電阻, 為甚麼搭棚好過PC板, 因為音樂的細微信號經過好的機內線和完全熔合的焊點,有如經過平坦的高速公路,平順而細滑. PC板就不一樣了,先是鍍的銅箔導電性就差一些,焊點也是需經過薄薄的焊錫才接通銅箔,有如經過橋樑不平的接縫. 經過粗躁的路面和一堆高低不平的接縫,好聲都被折磨光了. 精密繞線電阻 其引線和電阻體的接點是很講究的. 再加上電阻體本身就是電阻絲,比起一般金屬膜電阻好聲, 當然是必然的.有些人說線繞電阻含有電感成分, 會強化高頻, 其實剛好相反. 在較大阻值下, 繞線重重疊疊, 反而雜散電容的影響會大過電感. 所以用在回饋或屏極時, 不須再加補償電容.

Precision Wirewound Resistors

Wirewound resistors are generally classified as either “power wirewounds”

or “precision wirewounds.” Power wirewound resistors are

subject to greater changes in service and are not used where precision

performance is required; therefore, they are not considered in

this discussion.

The wirewound resistor is usually made by winding insulated resistance

wire of a specific diameter around a bobbin. Different wire

diameters, lengths, and alloys provide the desired resistance and

initial characteristics. Precision wirewound resistors have better ESD

stability and lower noise than thin or thick film resistors. Wirewounds

also have a lower TCR and better stability.

The initial tolerance of wirewound resistors can be as low as

・} 0.005 %. The TCR, which is the amount of resistance change with

each degree Centigrade change in temperature, can be as little as 3

ppm/°C typical; but for low resistance values, wirewounds are generally

in the region of 15 ppm/°C to 25 ppm/°C. Thermal noise is low,

and TCR tracking to ・} 2 ppm/°C over a limited temperature range is

possible.

UTC A-20 接線技巧

玩物 / 傳承

近來，想把這很像挖斯爐開關的音控，裝進去這鋁盒裡!
這種事情，必須先思考後，再動手；免得走一步錯一步!











音響這東西，花大錢買，就不好玩了!
畢竟這些東西，死後我們一樣都帶不走!
我們只要盡到傳承、保存、勿破壞；完整讓到下一個玩家；並長長久久存在

















這是上半年前娤級間變壓器實，紀錄的照片!
DIY，真的事件吃力不討好的事。

孔，鑽得亂七八糟，這次想必要去買的專用鑽刀。。。。。。