原帖由 ice1234 於 2007-9-18 21:28 發表
唔係對對band都係差455khz
好似fm咁
有分dual conversion同single conversion
前者晶體頻率差10.7mhz...如果發射係27.195mhz,接收高放電路先將 ...
原帖由 ryancmlam 於 2007-9-18 11:00 PM 發表
I think it could be if the FM is a single conversion system. However, I don't know and haven't checked. I just know that AM is, because of .... cheap....
原帖由 ice1234 於 2007-9-20 10:54 發表
YES,only AM and FM single conversion system can use 潛水 ,because the unwanted image signal is so closed to wanted signal(only 910khz),it is difficult to filtered out of this unwanted signal ,h ...
原帖由 ryancmlam 於 2007-9-20 11:36 PM 發表
Probably my knowledge is out of dated now. How come a cheap cheap Esky receiver could be dual conversion....
原帖由 Panda 於 2007-9-21 11:41 AM 發表
收音機 :
AM I.F. Frequency : 455KHz
FM I.F. Frequency : 10.7MHz
RC :
AM I.F Frequency : 455KHz
FM ( PPM & PCM ) I.F Frequency : KO , Futaba , SANWA ,JR 間間厰都不同 . PCM 同 PP ...
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