johnnykut 發表於 2012-10-24 10:54 static/image/common/back.gif
第一次焊到咁真係幾靚
近電解電容有一點電阻位好似有d唔靚,,可能反光問題 ...
師兄眼利
個排電阻係我第一排焊既電阻,焊得真係唔係幾好
唔關反光事
johnnykut 發表於 2012-10-24 11:17 static/image/common/back.gif
我o個陣唔識野買埋另外兩隻,,
砌完都冇乜點聽,,,係咁改隻cmoy
師兄試下跟住佢地一步步改,,好快 ...
另外兩隻??
我都想跟住改,不過條thread入面好多相都睇唔返,所以比較難跟
billymud 發表於 2012-10-24 11:17 static/image/common/back.gif
why no OpAmp part number ?
you should use gold-plated IC socket, for ease of OpAmp exchange !
...
套件入面佢地特登磨走的
所以睇唔到。
johnnykut 發表於 2012-10-24 11:28 static/image/common/back.gif
好多牌子既成品機都會磨走opamp號碼,都預左唔係貴野啦~~~
另外亦識得有人因為用左好耐時間試ic,,,拍人太 ...
too bad !....... OpAmps are not secret and many alternatives in market. {:6_199:}
have fun to experiment the others.
billymud 發表於 2012-10-24 12:20 static/image/common/back.gif
too bad !....... OpAmps are not secret and many alternatives in market.
have fun to e ...
I have a 5532DD on-hand and will change it to have a test
patkwok 發表於 2012-10-24 12:01 static/image/common/back.gif
師兄眼利
個排電阻係我第一排焊既電阻,焊得真係唔係幾好
其實o個點似假焊,,師兄可以既話補焊穩陣dd~~
另外兩套係RA 1同M47
M47係op+buffer,當時賣貴多30蚊
patkwok 發表於 2012-10-24 12:09 static/image/common/back.gif
套件入面佢地特登磨走的
所以睇唔到。
放心,,唔係咩好野,志在俾你開到聲,,低電壓下好過5532
佢地出左幾個月之後就有講,,好似係kia4117咁上下(應該記錯)
堅呀{:6_193:}
johnnykut 發表於 2012-10-24 12:32 static/image/common/back.gif
其實o個點似假焊,,師兄可以既話補焊穩陣dd~~
另外兩套係RA 1同M47
多謝師兄提點,過兩日再執執
johnnykut 發表於 2012-10-24 12:35 static/image/common/back.gif
放心,,唔係咩好野,志在俾你開到聲,,低電壓下好過5532
佢地出左幾個月之後就有講,,好似係kia4117咁上下(應 ...
我手頭仲有對OPA627AU,不過係單運放。要有轉插用兩粒單運放變雙運放
