For the KHF-950 system, can the KTR-953 and KAC-952 be mounted in different locations in an aircraft?
Yes, the KTR-953 receiver/exciter and KAC-952 antenna coupler can be mounted in different locations but problems may be encountered as a result. When the KTR-953 and KAC-952 are mounted in different locations, transmitter distortion and common mode rejection can be encountered within the system. Other symptoms might include: • Display flashing intermittently when the user tries to tune the HF • Audio distorted when transmitting on AM or SSB • Output power low and varies when measured with wattmeter If the KTR-953 and KAC-952 must be mounted more than 3 feet apart, then there are 3 Service Bulletins that should be incorporated into these units. • KTR-953 Service Bulletin 8 is effective for units S/N 29974 and below. This SB consists of removing several parts, install some wires, and mounting an feedback board into the unit • KAC-952 Service Bulletin 9 is effective for units S/N 14332 and below or units with an older control board. This SB consists of make changes to the ALC circuit. • K
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