Re: Interference

Paul Butzi (W7PFB)

I’ve been monitoring.

I have two separate reports:

1.  At one point while I was mobile between Redmond and Fall City, I got what sounded like DMR or DSTAR, moderate signal strength.

2.  In Carnation, HEAVY interference on 146.5, but it sounded like very loud static, with no modulation.  The interference stretched from 146.450 or so all the way up past 146.550, strongest at 146.51 or so.  As I drove from Carnation to my place, the strength of that interference faded.  I get about two bars at my house.

If someone could take a look at a panadapter when they hear the interference, well, it would be mighty nice to know how wide the different signals I heard are.

If it’s DMR or DSTAR then the bandwidth occupied is going to be narrow.  What I heard entering Carnation was really, really wide - 100KHz at least.  Or at least I could pick it up on my Kenwood D710G across a range that wide.

-p W7PFB
73, Don’t forget to smile and have fun!

On Jun 1, 2020, at 6:21 PM, Rowland <rowland.brasch@...> wrote:

When I monitored the noise on 146.500 it hit me at S9 plus and was very loud.



On Mon, Jun 1, 2020 at 5:24 PM Paul Butzi (W7PFB) <w7pfb@...> wrote:
146.500 is in the VNDB repeater output allocation in the WWARA plan.  I was pretty sure there was a DMR repeater there so I looked and sure enough, there’s a DMR repeater listed in the coordinated plan, callsign AF7PR.  

If it’s doing CW ID, just knowing whether it’s IDing as AF7PR would give us a big clue.  I think the repeater is supposed to be way the heck up near Bellingham, which seems like a long shot to the Sno Valley.

-p W7PFB
73, Don’t forget to smile and have fun!

On Jun 1, 2020, at 5:11 PM, Tom WA7TBP via <tomwa7tbp@...> wrote:

Hello all:

I would like to point out that on 146.500 MHz, there is a strong digital signal. I believe it could be a digital paging signal. It is intermittent, but sometimes can last for several minutes. I have heard a Morse code ID once in awhile, but have not been in a position to copy the code. Please take a listen and see if you hear the signal. Rowland and I have both heard it. If you can get any information about this signal, let me know and I will do what I can to get some time of action started to rectify the situation.

Thank you in advance for taking a listen.



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