REFLECTOR: KX 155 radio

[Laurence Coen]

John,

Yes, your NAV antenna can be checked.  Being a "ham" radio guy I have the 
right stuff to do the job but so would an avionics shop.  It sounds like, 
from what you've said, that it is probably the antenna.

Larry Coen
N136LC

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From: "John Dibble" <aminetech at bluefrog.com>
Sent: Sunday, December 09, 2012 3:00 PM
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Subject: REFLECTOR: KX 155 radio

> My KX 155 radio has 1100 hours and has recently developed an intermittent 
> noise, mainly right after engine start, but sometimes persisting for a few 
> hours.  The noise is identical to the constant noise when I pull out the 
> volume knob for weak signals.  Another problem is that I'm not receiving 
> VOR signals well.  I fly GPS direct, but monitor VOR's along my route as 
> backup.  On the "TO" side I have nothing in the window and the needle is 
> dead.  Once I pass by the VOR, I get a "FROM" indication in the window and 
> the needle responds normally.  I sent my radio and my KI 209 cdi to an 
> avionics shop.  They made some minor adjustments and indicated that both 
> instruments were fine.  They told me that the closer the radio ground is 
> to the battery, the better the sound quality.  So I ran both grounds right 
> to the battery.  This significantly reduced the radio noise, but did not 
> help the VOR reception.  I have only one nav, so I can't try another 
> antenna.  Is there a way I can check my nav antenna so see if it's working 
> properly?
>
> Thanks,
>
> John
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