Re: 146.605 MHz signals

Shawn / K7ATA

N7ERP is the Sammamish ARES / RACES RACES group callsign.

All the other callsigns belong to California operators


On 4/17/2019 10:33 AM, Benjamin Thompson wrote:
I’m not supper familiar with Dstar, but my log says the caller: NZ6D H/DNGL, and Rx RPT1 is N7ERP G, and Rx RPT2 is N7ERP C.

1 Callsign given during transmission was K6QYO.

-Benjamin Thompson, sent from my phone.
*From:* on behalf of GARY DENSOW <garydensow@...>
*Sent:* Wednesday, April 17, 2019 10:21 AM
*Subject:* Re: [snovarc] 146.605 MHz signals
D Star simplex are 146.66, 146.58, 146.56, 146.85.  Repeaters in the vicinity Are Sea Tac at 146.66, Bremerton at 146.62 from Gold Mt., 146.64 Pierce County ARES.

Gary Densow



*From:* <> on behalf of Paul Butzi (W7PFB) <w7pfb@...>
*Sent:* Wednesday, April 17, 2019 10:05 AM
*Subject:* Re: [snovarc] 146.605 MHz signals
After listening to a bunch of audio samples on the internet I think I was wrong, it’s not DMR, it sounds more like DSTAR in simplex mode.

If someone has DSTAR experience and can help me set up DSTAR on my Kenwood TH-D74A, well, I’d sure appreciate it.

If someone with a DSTAR radio already set up could give a listen we might know who it is.

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

On Apr 13, 2019, at 5:34 PM, Ralph Lease < <>> wrote:

I got out my handy dandy direction finding kit we built.  I really think we are hearing 2 separate sources for transmissions (duh, 2 radios transmitting).

First, I can locate on one of the transmissions with the Handi-finder. I can null the tone with the signal to the side of the dipole. The direction of the null puts it on a 0 degree magnetic heading from my
QTH.  In another part of the transmission, I could not discern the bearing as I could not null out the tone.

Again, the null was off the side of the dipole not the ends for reference.

Just my 2 cents.


On Sat, Apr 13, 2019 at 7:37 AM Paul Butzi (W7PFB) <w7pfb@... <mailto:w7pfb@...>> wrote:

I’m pretty sure what we’re hearing, at least on 146.605, is DMR.

Here’s a recording of what DMR sounds like if you listen to it
via analog FM:

The transmitter must be quite close to me.  Not long ago, when my
station was in crossband repeat, there was one fellow who had a
very confused conversation with Ken when my station picked up his
transmission of whistles, kerchunks, and other random words and
noises (clearly testing some gear and not IDing nor realizing his
signal was being crossband repeated to Cougar).  I could pick up
his signal on reverse, so he was either using quite a lot of
power or else was fairly local to my place.  His analog FM signal
was on 146.605.  Sadly I don’t recall his callsign, Robin looked
it up and found it belonged to some ham based in Oregon.

I suspect what we’re hearing is the same transmitter.

I also believe this is what DMR sounds like when working through
a repeater, the sound for simplex is apparently different.  I’ve
done some digging around on various DMR sources but haven’t found
any listing for a repeater with either an input or output
frequency of 146.605.  But perhaps someone is operating a
uncoordinated/unlisted DMR repeater?

I’ve tried to DF the signal usning my HT and Yagi.  the signal is
so strong at my QTH that it’s nearly full scale even in the null
of the Yagi.  I should finish up my DF kit and give it a whirl.
 it does not help that the transmissions are so randomly
intermittent and short.

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

On Apr 12, 2019, at 5:36 PM, Rowland <k7rwb@...
<mailto:k7rwb@...>> wrote:

Wow I just heard it here at S9.  It is like Tom describes and
does not last very long. About three seconds, three second pause
then again about three seconds then stopped. If Tom and I are
both getting it a S9 that is powerful signal.
<>>*On Behalf Of*Tom WA7TBP via Groups.Io
*Sent:*Friday, April 12, 2019 5:34 PM
*To:* <>
*Subject:*[snovarc] 146.605 MHz signals

Hello all,

I have been monitoring 146.605 MHz this afternoon. At my QTH,
Tolt HIll, with a unity gain antenna, I am receiving the signals
at S9 according to my receiver. It sounds to me as though this
is a telemetry type signal. I hear an audible beep, then the
"growling" signal starts, then there is an audible beep, and the
"growling" stops. This was the sequence of events I heard for
over two hours. I was not able to predict the frequency of the
signals. I believe we may have a dirty telemetry transmitter
By the way, I believe I am hearing these signals on other ham
frequencies as well. I have been hearing signals like these for
about 2 weeks. I haven't been able to see what other
frequencies, as I am usually driving and don't want to look down
at the radios.
Let's keep listening and see if we can find the "hottest" spot
for the signals, and maybe do like Shawn said and get out our DF

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