前幾天再彈吉他的時候.. 再調tone的時候突然聽到好像有說話的聲音.. 這時我把音量調大一點.. 哇勒..居然跑出電台的聲音.. 是賣藥的地下電台.. 我在想會不會是我的導線變成天線之類的.. 有沒有對電路學比較熟的朋友能告訴我一下這是什麼原因嗎..?? 今天不小心想到一個好玩的問題.. 如果某一個很屌的吉他手在台上表演的時候.. 不小心跑出賣要電台的聲音不知道會怎樣... 胡思亂想..
講到這個~今天我去樂器行買音箱~試音箱的時候~DIST 的CHANNEL只要GAIN調大一點的時候~就會有個中年婦女唱歌的聲音 = = 這個問題以前也有人討論過~當時看到那篇討論~還覺得挺無言的~沒想到今天我也遇到了~
這各情形我也發生過 是在我的vox身上 當年在練踩娃娃 然後 突然在恍惚間聽到周杰倫的歌 忘記是哪首 搞了半天 原來是我的847 踩一下 就唱歌 關掉 就沒了 其實 我也還是不了解到底是哪理出問題 因為 後來就沒發生過了 也就只有那麼一次 不過 感覺還蠻好笑的
misc - I am picking up radio stations, how can I stop this? From Eric Hensel: A 47pf cap to,ground, after the input cap will probably do it --you can adjust this up or down --higher values will start to cut treble. use the lowest value that works. From Zachary Vex: Mount the pc board as close as you can physically to the metal box. this will serve as a ground plane to reduce the heterodyning that can pick up rf. don't let the input and output wires cross... make sure the layout doesn't allow input and output connections to get too close to each other. if you can, solder in ground connections around (near) the sensitive input circuitry. if rf is being picked up by rectification, these fixes won't help, but if it is being picked up due to beat frequencies generated by heterodyning (internal rf oscillation in the circuit beating against rf from radio stations) you can get rid of it through the use of careful layout and grounding to reduce oscillation. You might try using miniature shielded cable inside of the enclosure for the input to the board too. http://www.diystompboxes.com/wiki/index.php?title=DIY_FAQ 電子電機科拜請~~