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

[Mike Schatzberg]

Ken:

You might try a ferrite block on the headset cable.  Wrap a few turns around
a split ferrite block and see if it improves the situation.  RF may be
getting into the headset, and distorting the audio.  No one will hear the
problem on your transmitted signal, because there isn't any.

A line isolator outside the shack, if you are using coaxial transmission
cable,  might keep the RF from reaching the headphones also, if the RF is
riding in on the coax shield.  The problem is sometimes associated with the
antenna being quite near to the operating position.

73 and Happy DXing,

Mike
W2AJI
----- Original Message ----- 
From: "Ken Witkin" <ken.witkin at verizon.net>
To: <1000mp at mailman.qth.net>
Sent: Monday, March 27, 2006 7:53 PM
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?
______________________________________________________________
1000mp mailing list
Home: http://mailman.qth.net/mailman/listinfo/1000mp
Help: http://mailman.qth.net/mmfaq.html
Post: mailto:1000mp at mailman.qth.net