John -
I saw your message on the ECraft reflector. I have tried exactly the
same thing in my shack, and I always will hear a raspy audio sound,
even from perfectly functioning rigs that get FB on air reports. I
have never had time to track
down exactly what is happening, but don't get wrapped around the axle
too much. I suspect it has something to do with a combination of the
extreme sensitivity of a ham rig, and the dummy load consuming the
actual modulated
output of the rig under test, leaving mostly "leakage" products and
funny IM from things that only travel a few feet for the listening
rig to hear.
Try it on the air before you get too deep into troubleshooting.
73,
Bill
K4DXU
KX1 #702
K2 #5540
Message: 2
Date: Wed, 13 Dec 2006 06:14:58 -0600
From: "John R. Lonigro" <
[hidden email]>
Subject: [Elecraft] Raspy audio from K2
To:
[hidden email]
Message-ID: <
[hidden email]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I recently finished building the KSB2 and did the alignment on the
filters. Everything seems to be working as advertised, except on
transmit my voice sounds raspy. I haven't had time to dig into the
problem yet, but I did try 3 separate mics and got the same result. For
my test, I transmitted at 1 Watt into a dummy load while listening on my
Icom 706 with headphones. My first assumption is that I simply need to
tweak the transmit filter, but I'm asking if anyone else has had the
same symptom that was perhaps caused by something else. For example, is
it possible the two radios are simply too close to each other for a good
audio test? They are on separate supplies and were about 6 feet apart
during the test.
Thanks and 73's,
John AA0VE
K2#3401
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