I checked my 991A,
I do hear the signal at 147.456 but it is not very strong. It is only partial
quieting.
> On Feb 26, 2020, at 8:08 AM, John Young via VHFcontesting
> <vhfcontesting@contesting.com> wrote:
>
>
> Alan
> I use an FT991A and have not had the problems described.
>
> I usually run the squelch at zero and put up with the noise when in the
> national radio quiet zone (with permission) and I run it at 2 when closer to
> the DC area and near cell towers at my Freezeland road site. I do this to
> copy signals fluttering in and out of capture.
>
> No noise bursts. I will check 147.456 when I get home. Lots of digital
> garbage in the DC area on all bands, really bad when I set up the beam and
> point to the CIA a few miles away. LOL.
>
> Send a copy of the video to Nosigma@aol.com
> I will give it a listen/look.
>
> I love my 991A, it's been trouble free and with 12ft beams and brick amps I
> can reliably work 35W 2m/70cm stations on omnis out to 180 miles and big
> stations on beams out to 300 miles from either of my hilltop sites. 6m FM is
> the weakest band (I assume because the antenna gain is lowest of the 4 bands)
> with the best being 220 via a Demi xvrtr with a 10m IF.
>
> 73
> John
> KM4KMU
>
>
>
> On Wednesday, February 26, 2020 Alan Larson <wa6azp@gmail.com> wrote:
> Has anyone used the FT-991 for FM contesting, particularly on 2 meters?
> I have been seeing some annoying behavior with it.
>
> The squelch has an initial setting of 5, which quiets the receiver on 28,
> 50, and 430 MHz bands. On 144 MHz, there are bursts of noise as the
> squelch opens for a fraction of a second every 10-20 seconds, the interval
> varies a lot. This is seen with a dummy load connected to the antenna
> connector, so it is not signals being received.
>
> I sent the rig to Yaesu for repair, and they reported that no problem was
> found, that I should just turn the squelch up higher. Settings or 15 to 20
> seem necessary on 144 MHz to minimize the noise bursts. Since my goal
> would be to hear the weak signals, I don't want to turn the squelch up
> higher than necessary.
>
> Also, I have found various birdies in the receiver on VHF bands, a
> particularly strong one was near 147.456, which could be received on a
> second receiver near the 991.
>
> Do others see similar issues? This radio is fairly early, so it would be
> interesting to know if the FT-991a has similar problems.
>
> I have a video of some of this, if any are interested, I will look at
> reducing the size and mailing a copy.
>
> Thanks,
>
> Alan
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