[450] Fwd: Mystery QRM (2)

Mon May 20 10:19:00 EDT 2013

Sure but it's a shared medium....as much as we would like to think we own
it, we don't. It's proper to check if the channel is not in use. I highly
suspect they did in fact do a local check up there and didn't hear
anything. It's different when the QTH is at 35,000 ft. Then it's LOS to the
entire NE. Either way....the probability of them choosing 450 or 440 AND
running into a group of people on VHF is so astronomically low. Moreso that
they only do this for 2 hours a year. And even crazier....we tracked it
down to the source.....

All in all pretty low odds of any of this happening!

Certainly, the tone with which the students responsible were addressed was
imho harsh...

Oh well...
On May 20, 2013 3:40 PM, "Rich" <t41 at optonline.net> wrote:

>   Sorry, but they WERE in the wrong. If you are going to transmit from a
> 100k foot location, its incumbent upon YOU to make sure the frequency is
> clear. Also Bobs note was not accusatory or nasty. I think we just leave it
> where it is.
>
>
>
>  *From:* John Foege <john.foege at gmail.com>
> *Sent:* Monday, May 20, 2013 4:47 AM
> *To:* 144.450 Mailing List <450 at lists.vhfwiki.com>
> *Subject:* Re: [450] Fwd: Mystery QRM (2)
>
>   Bob,
>
> I agree with Chris...these people certainly feel like they just got
> repirmanded for doing absolutely nothing wrong.
>
> I'd really suggest sending a letter to everyone involved and telling them,
> that by no means does this represent a problem, and that you are very happy
> that the students are using HAM radio for backup telemetry data...
>
> That you were suprised how far they got out...
>
> etc. etc....
>
>
> We don't want to poo poo people just because we managed to hear their
> +10,000 FT ASL transmitters :P
>
>
> On Mon, May 20, 2013 at 5:10 AM, chris <cralt at comcast.net> wrote:
>
>>  Hopefully they are not discouraged from using ham radio for this stuff.
>> Maybe just suggest that they try shifting to a different freq so they dont
>> interfere with us and we dont interfere with them. There is plenty of room
>> in that part of the band for everyone.
>>
>>
>>
>>
>>  On May 19, 2013, at 7:01 PM, David McKenzie wrote:
>>
>>  cool, glad it's resolved and that we figured it out
>>
>>
>> On Sun, May 19, 2013 at 5:47 PM, Bob <n1ujs at toast.net> wrote:
>>
>>> The latest:
>>>
>>> ---------- Forwarded message ----------
>>> From: Kristina A. Lynch <Kristina.A.Lynch at dartmouth.edu>
>>> Date: Sun, May 19, 2013 at 5:28 PM
>>> Subject: RE: Mystery QRM (2)
>>> To: Max Fagin <maxfagin at gmail.com>, "David G. McGaw" <
>>> David.G.McGaw at dartmouth.edu>
>>> Cc: "Eric W. Hansen" <Eric.W.Hansen at dartmouth.edu>, "Yorke J. Brown" <
>>> Yorke.J.Brown at dartmouth.edu>, "Maxwell H. Fagin" <
>>> Maxwell.H.Fagin at dartmouth.edu>, Bob <n1ujs at toast.net>, "Todd S.
>>> Anderson" <Todd.S.Anderson.14 at dartmouth.edu>
>>>
>>>
>>>
>>> Dave, Eric-
>>> Please relay my apologies to the group who were disturbed by our
>>> transmissions.
>>> We use the ham radio as our backup telemetry system on our research
>>> balloons,
>>> for about 2 hours once or twice a year;  we have been doing this for
>>> approximately five years.  It is possible that Amanda Slagle (who
>>> graduated
>>> last year) was in the habit of telling Dave McGaw ahead of time?  And
>>> this
>>> protocol got slipped since she left.  We can certainly be sure to let
>>> Dave know
>>> in the future, if that would be helpful.  Also, now that our DNT system
>>> is working,
>>> we could significantly drop the data rate on the backup ham
>>> transmissions if that
>>> would be helpful.  Please let me know.
>>> Regards
>>> Kristina Lynch
>>> Dartmouth Physics/GreenCube Faculty Mentor
>>> www.dartmouth.edu/~aurora
>>>
>>>  ------------------------------
>>> *From:* Max Fagin [maxfagin at gmail.com]
>>> *Sent:* Sunday, May 19, 2013 3:02 PM
>>> *To:* David G. McGaw
>>> *Cc:* Eric W. Hansen; Yorke J. Brown; Maxwell H. Fagin; Bob; Todd S.
>>> Anderson; Kristina A. Lynch
>>>
>>> *Subject:* Re: Mystery QRM (2)
>>>
>>>   The interfering transmission on 144.440 MHz was coming from the
>>> GreenCube 6 balloon payload which was in the air over Mt. Washington from
>>> 10:30-12:30 this morning.  The flight is over, and there will be no more
>>> transmissions on that frequency today. Todd and Kristina (cc'ed) are the
>>> lead investigators on the payload, and should be contacted with questions
>>> about the transmissions.
>>>
>>> -Max
>>>
>>> On May 19, 2013, at 2:21 PM, "David G. McGaw" <
>>> david.g.mcgaw at dartmouth.edu> wrote:
>>>
>>>  Hi Eric,
>>>
>>> It is possible that Yorke and Max have a packet transmitter on their
>>> research balloons.  If so, they need to check frequencies beforehand AND
>>> have to contact you as the trustee of W1ET or me as the officer of record
>>> before using the callsign.
>>>
>>> Yorke, Max?
>>>
>>> David N1HAC
>>>
>>>
>>> On 5/19/13 1:32 PM, Eric W. Hansen wrote:
>>>
>>> Interesting hypothesis.  Any ideas?
>>>
>>> Eric
>>>
>>> From: Bob <n1ujs at toast.net>
>>> Date: Sunday, May 19, 2013 1:18 PM
>>> To: Eric Hansen <eric.w.hansen at dartmouth.edu>
>>> Subject: Re: Packet transmissions
>>>
>>>   Some have suggested it might be a weather balloon?  In any case, it
>>> ceased transmitting about an hour ago.
>>>
>>> Thanks for looking into it.
>>>
>>> Bob N1UJS
>>>
>>>
>>> On Sun, May 19, 2013 at 1:08 PM, Eric W. Hansen <
>>> Eric.W.Hansen at dartmouth.edu> wrote:
>>>
>>>>  That is really strange.  Our repeater operates on 444.950, and that's
>>>> the only source of transmission I am aware of.  We haven't operated packet
>>>> for years.  I will forward your message to some other people who can help
>>>> track this down and get back to you if I find anything out.
>>>>
>>>> Thanks for the heads up.
>>>>
>>>> Best,
>>>> Eric Hansen
>>>>
>>>> From: Bob <n1ujs at toast.net>
>>>> Date: Sunday, May 19, 2013 11:25 AM
>>>> To: Eric Hansen <eric.w.hansen at dartmouth.edu>, ham radio club <
>>>> ham.radio.club at dartmouth.edu>
>>>> Cc: 450 <450 at lists.vhfwiki.com>
>>>> Subject: Packet transmissions
>>>>
>>>>     To whomever it may concern,
>>>>
>>>> There are strong packet transmissions being sent on 144.440 that are
>>>> identified by the W1ET call sign.  They are causing a bit of a disturbance
>>>> to a large group of operators on 144.450.  I imagine this is unintended, as
>>>> the last time something like this happened it turned out the transmissions
>>>> were intended for a frequency 600 khz higher, but the operator had
>>>> inadvertently pushed the "shift button".
>>>> Could you please check your station and see if it is responsible?
>>>>
>>>> Here is a copy of the transmission:
>>>>
>>>> *W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150425h4403.66N/07114.**84WO-19C
>>>> Good fix 5 Seconds*
>>>> *W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150430h4403.55N/07114.**74WO/A=041788-20C
>>>> Good fix 5 Seconds*
>>>> *W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150436h4403.44N/07114.**66WO/A=041928-20C
>>>> Good fix 5 Seconds*
>>>> *W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150448h4403.20N/07114.**47WO/A=042230-20C
>>>> Good fix 5 Seconds*
>>>> *W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150454h4403.08N/07114.**40WO/A=042363-20C
>>>> Good fix 5 Seconds*
>>>> *W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150500h4402.96N/07114.**34WO/A=042468-20C
>>>> Good fix 5 Seconds*
>>>> *W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150506h4402.84N/07114.**28WO-20C
>>>> Good fix 5 Seconds*
>>>> *W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150512h4402.76N/07114.**22WO-20C
>>>> Good fix 5 Seconds*
>>>>
>>>> It has been suggested that the actual transmission bothering us may be
>>>> a "retransmission" of your signal by an "unknown station", however the only
>>>> call sign in the transmission is yours.
>>>> The signal I am receiving is quite strong (40-60 over s-9 to a phased
>>>> pair of 10 elements) in the direction of roughly 20 degrees from my
>>>> location in Newtown, CT, and appears to be horizontally polarized.
>>>>
>>>> Thank you for any assistance you can provide us in this matter.
>>>>
>>>> Bob N1UJS
>>>>
>>>>
>>>
>>>
>>>
>>>
>>>
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>>>
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