"Ben" wrote in message ...
The usual cause when this happens to me is an frequency offset in either
my in rig or the other operators. Are you sure that your rig isn't set
accidently to some type of TX shift. There are two rigs at the other end
and none of them can hear you.


Now the shingles have dried out we can hear each other on all the radios and
antennas. I know nothing has changed as the radios need to be programmed by
computer and I have the cable.

The distance is just under 10 miles so we should be almost radio line of
sight. The land between us is rolling hils. Going from about 600 feet at
the lowest to 900 feet at the highest.

Back when the Michigan State Police used 40 MHz, at some posts static levels
would become so high as to reduce range to almost nothing. Some say it was
precipitation noise (as is common with aircraft) and some people believe it
had another cause. It seemed to be weather related.

On 6 meters, with an AM circuit I had for years with my father, I have heard
discharge noise that starts with a sequence of pops and progresses to a
steady roar that occasionally would abruptly stop. (about 100 km path with
yagi antennas at both ends)

My guess is it was due to local, enhanced noise. Effects may have been
suppressed due to the nature of FM and its mode of squelching. 73,
Mac N8TT

"Ralph Mowery" wrote in message
m...


"Ben" wrote in message ...
The usual cause when this happens to me is an frequency offset in either
my in rig or the other operators. Are you sure that your rig isn't set
accidently to some type of TX shift. There are two rigs at the other end
and none of them can hear you.


Now the shingles have dried out we can hear each other on all the radios and
antennas. I know nothing has changed as the radios need to be programmed by
computer and I have the cable.

The distance is just under 10 miles so we should be almost radio line of
sight. The land between us is rolling hils. Going from about 600 feet at
the lowest to 900 feet at the highest.



J. C. Mc Laughlin
Michigan U.S.A.
Home:

On 10/8/2012 8:56 PM, J. C. Mc Laughlin wrote:
Back when the Michigan State Police used 40 MHz, at some posts static
levels would become so high as to reduce range to almost nothing. Some
say it was precipitation noise (as is common with aircraft) and some
people believe it had another cause. It seemed to be weather related.

On 6 meters, with an AM circuit I had for years with my father, I have
heard discharge noise that starts with a sequence of pops and progresses
to a steady roar that occasionally would abruptly stop. (about 100 km
path with yagi antennas at both ends)

My guess is it was due to local, enhanced noise. Effects may have been
suppressed due to the nature of FM and its mode of squelching. 73, Mac N8TT


That noise sequence is exactly what I hear when I see a corn snow squall
come through my property in the winter. I have actually watched the wind
blown snow come closer and closer while the HF radio noise increases
until all signals are wiped out, then when the back edge of the squall
passes the antenna, all is quiet, again.

I live at 2800 ft in the Central Oregon desert. The antenna is either a
ground mounted 5BTV with 40 radials, or a 160 meter horizontal loop at
35 ft.

Paul, KD7HB