• Features:
  
  
  This module uses the core of Japan's Murata CFJ455K filter element , the center frequency of 455K, the bandwidth 1K, suitable for use in CW mode or SSB mode , the effect was particularly evident in CW mode , after opening the filter filters out most of the noise , only ticking sound, can significantly improve the recognition rate ; bandwidth voice SSB significantly narrowed down , the noise becomes small , but the sound is still recognizable , to hear what the other said , just sounds a little awkward , not 1K recommend using SSB bandwidth filter , consider using 2.7K bandwidth.
  
  The identification circuit with the original filter can be inserted in the machine to identify what kind of filter, the filter may be generally of 1K 500,2.7 k displayed on the screen displayed on the screen of the filter 2.3 , so only the screen than to display FIL1 FIL2 intuitive , of course , you can also let him display FIL1 FIL2
  
  Installation:
  
  
  Two filter mounting position ( 817 a ) , which is four pins on one side , the other side is three pins, pin aligned in accordance with the filter after turning off the machine , turn the machine on the cover , you can see plug can be. Installed after the power is turned on , you can filter into the menu opens .
  
  
  If both 1K and 2.7K purchased filters , can be identified by the characters printed on the filter , model CFJ455K8 is 1K bandwidth filter ; CFJ455K13 is 2.7K filter , regardless of the time of installation slots two slots can be easily reversed, installed after the boot machine that can identify themselves is 1K, that is 2.7K.
  
  
  
  
  Package Contents
  100% Brand New (High Quality)
  1xCW /SSB 2.7K narrowband filter compatible with YF-122S For YAESU FT-817/857/897

Note :
Only one 2.7K narrowband filter

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