One way shingles
 

Not that it maters but another ham and myself have been licensed for 40
years.

We ran across somethng the other day that we had not seen before. We live
about 10 to 15 air miles apart. I have a vertical dipole at 35 feet on a
tower. He has 2 differant FM rigs and vertical dipole wire antenas in his
attic about 50 feet apart. I can work him direct on 6 meters with him
mobile in his drive way. A couple of days ago we could work with his attic
antenna.
He built another antenna , so he has two antennas and rigs. A Midland and
GE comercial unit that puts out 40 watts each. I check the sensitivity on a
HP 8924C and they both seemed to be as good as a Midland I was using.

It rained and now he can not hear me, but I can hear him fine on either rig
and antenna of his. I switched to an Icom 706 at 100 watts out and and
checked the reflected power is about 2 watts. At this time, he could tell
when I was transmitting ,but not understand me. We were co-ordinating over
2 meters.

I also switched to an OCD antenna at 50 feet and could hear him. The
internal tuner on a 746 pro tuned it,but he could not hear me on that either
and he was about S-5 on the meter.

Do you think we have discovered one way shingles ???

Anyone else seen anything like this ?

KU4PT

One way shingles
 

On Wed, 19 Sep 2012 10:12:09 -0400, "Ralph Mowery"
wrote:

Not that it maters but another ham and myself have been licensed for 40
years.

We ran across somethng the other day that we had not seen before. We live
about 10 to 15 air miles apart. I have a vertical dipole at 35 feet on a
tower. He has 2 differant FM rigs and vertical dipole wire antenas in his
attic about 50 feet apart. I can work him direct on 6 meters with him
mobile in his drive way. A couple of days ago we could work with his attic
antenna.
He built another antenna , so he has two antennas and rigs. A Midland and
GE comercial unit that puts out 40 watts each. I check the sensitivity on a
HP 8924C and they both seemed to be as good as a Midland I was using.

It rained and now he can not hear me, but I can hear him fine on either rig
and antenna of his. I switched to an Icom 706 at 100 watts out and and
checked the reflected power is about 2 watts. At this time, he could tell
when I was transmitting ,but not understand me. We were co-ordinating over
2 meters.

I also switched to an OCD antenna at 50 feet and could hear him. The
internal tuner on a 746 pro tuned it,but he could not hear me on that either
and he was about S-5 on the meter.

Do you think we have discovered one way shingles ???

Anyone else seen anything like this ?

KU4PT



His antenna pre-amplifier has died.


w.

One way shingles
 

On Wed, 19 Sep 2012 10:12:09 -0400, Ralph Mowery wrote:
Not that it maters but another ham and myself have been licensed for 40
years.

We ran across somethng the other day that we had not seen before. We live
about 10 to 15 air miles apart. I have a vertical dipole at 35 feet on a
tower. He has 2 differant FM rigs and vertical dipole wire antenas in his
attic about 50 feet apart. I can work him direct on 6 meters with him
mobile in his drive way. A couple of days ago we could work with his attic
antenna.
He built another antenna , so he has two antennas and rigs. A Midland and
GE comercial unit that puts out 40 watts each. I check the sensitivity on a
HP 8924C and they both seemed to be as good as a Midland I was using.

It rained and now he can not hear me, but I can hear him fine on either rig
and antenna of his. I switched to an Icom 706 at 100 watts out and and
checked the reflected power is about 2 watts. At this time, he could tell
when I was transmitting ,but not understand me. We were co-ordinating over
2 meters.

I also switched to an OCD antenna at 50 feet and could hear him. The
internal tuner on a 746 pro tuned it,but he could not hear me on that either
and he was about S-5 on the meter.

Do you think we have discovered one way shingles ???

More likely you've discovered a nearby lightning strike
and now his RCVR front end is blown.

One way shingles
 

"Helmut Wabnig" [email protected] --- -.dotat wrote in message His antenna
pre-amplifier has died.


There are no antenna preamps. All our rigs just go from the output up some
coax and to the antennas.
The rigs are just older comercial Midland XTR and GE MLS. They have been
reprogrammed to 6 meters.

He has two seperate antennas and rigs. I had just checked all rigs involved
in the last two weeks with an HP 8924c test set and all were putting out 30
to 40 watts and the receivers would open the squelch at under .3 uV. I don't
recall the exect valuse, but they met the origional specs.
I know the rigs are on frequency to less than 100 hz. Also all were verified
that the receive and tramsmitt matched what we have the chanels set for.
The midlands were all programmed off the same programming file and computer.

One way shingles
 

"Allodoxaphobia" wrote in message More
likely you've discovered a nearby lightning strike
and now his RCVR front end is blown.

I do not recall any thunder storms in the area. If it blew the front end,
it would have had to do it to two rigs and the antennas are in the attic.

We will check out the sensitivity again at the first chance.

One way shingles
 

On Wednesday, September 19, 2012 9:12:14 AM UTC-5, Ralph Mowery wrote:
Do you think we have discovered one way shingles ???

My doctor gave me Acyclovir for shingles.

One way shingles
 

On 9/19/2012 1:42 PM, W5DXP wrote:
On Wednesday, September 19, 2012 9:12:14 AM UTC-5, Ralph Mowery wrote:
Do you think we have discovered one way shingles ???

My doctor gave me Acyclovir for shingles.


Then you must be omnidirectional again. Good for you.

One way shingles
 

"Ralph Mowery" wrote in message
m...
It rained and now he can not hear me, but I can hear him fine on either
rig
Hi
Either his receiver is dead or it is suffering interference.



--- news://freenews.netfront.net/ - complaints: ---

One way shingles
 

Ralph Mowery skrev 2012-09-19 16:12:
Not that it maters but another ham and myself have been licensed for 40
years.

We ran across somethng the other day that we had not seen before. We live
about 10 to 15 air miles apart. I have a vertical dipole at 35 feet on a
tower. He has 2 differant FM rigs and vertical dipole wire antenas in his
attic about 50 feet apart. I can work him direct on 6 meters with him
mobile in his drive way. A couple of days ago we could work with his attic
antenna.
He built another antenna , so he has two antennas and rigs. A Midland and
GE comercial unit that puts out 40 watts each. I check the sensitivity on a
HP 8924C and they both seemed to be as good as a Midland I was using.

It rained and now he can not hear me, but I can hear him fine on either rig
and antenna of his. I switched to an Icom 706 at 100 watts out and and
checked the reflected power is about 2 watts. At this time, he could tell
when I was transmitting ,but not understand me. We were co-ordinating over
2 meters.

I also switched to an OCD antenna at 50 feet and could hear him. The
internal tuner on a 746 pro tuned it,but he could not hear me on that either
and he was about S-5 on the meter.

Do you think we have discovered one way shingles ???

Anyone else seen anything like this ?

KU4PT


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.

73
Ben / SM0KBW

One way shingles
 

"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.

73
Ben / SM0KBW


It is doubtful the frequency has been changed in any way. The rigs are
comercial FM units and the only way to program them is with a computer
connection. Once set, all you can do is change the chanels on it. I know
the other ham did not change his as I have the programming cable. All the
Midland units were programmed using the same program file at the same time.
They worked fine before the rain. The frequencies were even verified with a
service monitor after they were programmed. I also used an Icom 746pro and
can read the frequency on that, and I did not see the display change
frequencies. At 100 watts, he could just hear me in the noise where before
the rain we were full quieting with the 40 watt units.