[1000mp] Problem With Audio Feedback In Headsets On 40 Meters

[Mike Brown]

No, but is the cable long on your YH-77? I have had luck with the little 
snap on ferrite that Radio Shack sells on my Heil headset. If that is not 
the case, how close is your 40m antenna to your shack? For whatever reason, 
40m has been the "headache" band for me also. I'm going to have to change 
the orientation of my 40m also, as it is close to the house, but opposite 
the shack. It's ok at 100 watts, but at 500 I have trouble. I've not used 
baluns, but if it is feedline radiation, that should help. This is an inv 
vee at 40ft, but part of one leg is too close to the house. At least with 
500 watts.

73 and GL Ken.....

Mike, K9MI


----- Original Message ----- 
From: "Ken Witkin" <ken.witkin at verizon.net>
To: <1000mp at mailman.qth.net>
Sent: Tuesday, March 28, 2006 00:53
Subject: [1000mp] Problem With Audio Feedback In Headsets On 40 Meters


Every time I transmit on SSB on 40 Meters, I get really terrible audio 
feedback distortion through my YH-77 headsets audio output.  However, when I 
disconnect the headsets and use my SP-8 Speaker--there isn't any audio 
feedback or distortion.  By the way, the SWR is 1:1.

This audio feedback problem only occurs on 40 meters.  Has anyone else 
experienced the same problem with the FT-1000MP Mark V?
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