I tried different coax cables. I tried bypassing the wattmeter. I
tried just going directly to the antenna - any of the antennas and had
the same result. I tried different QSK delays and turned VOX off.
Nothing seemed to alleviate the issue.
I cannot tell for certain, but I do *not* think I can hear this through
the speaker in the bottom of the radio. Again, it's too hard to tell
for certain. However, I did find that if I turned down the AF gain, the
noise, for the most part, was diminished.
I have my MON set to 6. My AF gain is now at 2 and I can barely hear
what I described before. Leaving the MON at 6 and turning up the AF
gain, the problem is louder. Changing the MON level does not increase
or decrease the noise I heard previously. Only by adjusting AF gain
down, can I really reduce the noise.
Can anyone think of something else to check?
73,
Joel - W4JBB
On 9/5/13 11:42 AM, Elwood C. Downey wrote:
It might RF feedback. For me it was especially apparent when running the Olivia
digital mode. I could hear a
faint warbling sound accompanying the correct tones, sort of like an echo but
not exactly. It was also there
on other modes but less obvious. It disappeared when I used my dummy load. I
finally traced it to a bad
connector on the coax run to the antenna. After fixing that the sound is
perfectly clean now.
73, Elwood, WB0OEW
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