Fwd: Tuesday Night Tech Net

[Tom Azlin W7SUA]

Hi.

I will try to make the tech net tonight ( conflict is the VWS 80m 
Digital Net). Not a conflict so much as dividing my attention between HF 
and the Tech Net.

If the club had the experimental license again I would like to 
participate from Arizona. So please include W7SUA ( geo coords on QRZ).

Just learned about a new mode/program for LF use:

http://www.qsl.net/zl1bpu/SOFT/WSQ.htm

Will be interesting to follow the discussion.

73, tom w7sua
chino Valley AZ


On 2/8/2015 10:48 PM, Nan and Sandy Sanders wrote:
>
>
>  From HAL WB3KDU
>
>
>
>>
>> TUESDAY NIGHT TECH NET SUBJECT:  A Proposal for 137Khz Experiments
>> ===========================================================================
>>
>> 8PM TUE ECHOLINK and AMRAD RPT.
>>
>> The topic this week is on the interest in a LF experiment.  Recall a
>> couple of years ago we had experimental license  WA2XTF and we fielded
>> a few stations, ran beacons and tried various antenna and receiver
>> experiments.   We learned a lot from these experiments about this band
>> and what kind of equipment worked "down under."   Frank G. has is
>> again interested in doing another round of LF experiments.   So,
>> this weeks Tech Net will be about what we did and what we could do
>> next time around.
>>
>> I will draft up an application for a FCC Part 5 Experimental license.
>> If I recall correctly we can only license a defined group of stations
>> at known
>> fixed addresses.  The station address must include the stations
>> latitude and longitude.   The station operator does not have to
>> possess an
>> amateur radio license since this class of license is designed for
>> research and development outside of amateur radio.   A typical problem
>> with this kind of fixed station group  arrangement is that its nearly
>> impossible to add a station after the paper work is filed.   This means
>> we will need to have everyone who wants to participate in these
>> experiments listed on the application when its filed.
>>
>> For Discussion:
>>
>> 1. What should we do this time around?    Last time around we learned
>> how important antennas were to success at LF.  What
>> kind of antennas should we be thinking about this time?
>>
>> 2.  A spectrum analyzer and waterfall display are essential to
>> receiving weak signals.  SDR how incorporate both of these and
>> SDR's are not that uncommon any more.   What can we do with these?
>>
>> 3.  How much power?  Last time around we didn't run much power into
>> the antennas.  Even a small amount of power across
>> one of the big loading coils was enough to ignite a small fire on my
>> lawn.
>>
>> 4. Transmitter: we used a Dutch class D transmitter last time around.
>> What should we do this time?
>>
>> 5. The 137 Khz band is still not allocated in the US to amateur
>> service although there is planning to it an amateur
>> band in coordination with international allocations.    Paul suggests
>> a reason for the request is to learn more about this band prior to
>> it being shift over to the amateur radio service.
>>
>> 6. Suggested Experiments:  I am interested in what we might do with
>> modulation using other members of the  JT65 family like WSPR or
>> another of Joe Taylor designed
>> protocols.
>>
>> 7. Some ideas on the timeline:   Phase I: (1) Station Constructions,
>> (2) Initial Propagation Study with CCW, Can we see one another?   (3)
>> Basic CCW communications,
>> real two-way contacts.  Phase II: (4) experiment with more advanced
>> modulation scheme, perhaps WSPR.
>>
>> ============================================================================================================
>>
>> TUESDAY NIGHT TECH NET MEETS AT 8PM EST TUESDAY NIGHT ON ECHOLINK
>> W4CIA conference point and the AMRAD 81/21 2m repeater in the Northern
>> Virginia Area.
>> Sandy, WB5MMB is Echolink conference point coordinator and net control.
>
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