[WriteLog] Feedback?

[Jerry Pixton]

Al,

Open the Volume Contol pannel for that sound board, select the Playback 
view. Make use that the Line In connection is Muted, or not selected, or 
whatever else it might be labeled. Often this is the path of feedback. The 
isolation transformers help if you have hum. But feedback is often the Line 
In signal going directly into the Line Out.

Jerry, W6IHG


At 01:57 PM 2/29/2004 -0500, Alfred J. Frugoli (KE1FO) wrote:

>Hello Writeloggers.
>
>When I've got everything hooked up for RTTY demodulation and AFSK though 
>the sound card I get feedback.  When I leave the audio output from the 
>rigs connected to the line in on the soundcard, I also get the feedback on 
>SSB.  If I pull the "recieve audio" line out of the line in on the sound 
>card, the problem goes away.  I'm not using isolation transformers on the 
>lines in and out of the soundcard.  Would this fix the problem, or am I 
>seeing something else.  I can tame this beast with careful use of the vox 
>and af gain controls, but if either gets too high, then I just trip the 
>vox and transmit the feedback.
>
>Thoughts?
>
>73 de Al, KE1FO
>
>
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------------------------------------------
Dr. Jerry R. Pixton, PIXOS Designs LLC
http://www.pixos.com/designs/RadioTuner/
jpixton at shentel.net
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