Hi, Dimitris, LF.
Thanks for posting an interesting article on QRP WSPR. I've been
experimenting along similar lines, but in my case I'm using a QRP Labs
Ultimate 2 kit, which uses the same DDS as your TX, but the WSPR is
generated by an ATmega168 AVR microcontroller. No PC necessary.
With an RF output of about 2 watts into a 5m high "tee" antenna with a 20m
top, I've been consistently spotted at 363km range during darkness by PA3ABK
and PA0A at 499km, with just one spot by DG3LV at 791km range.
My ultimate aim is to assemble a portable WSPR station and hike out to a
remote location, for example Dartmoor, in Devon. I'll need to check to see
if the terms of my licence NOV allow portable operation on 630m first ;-)
73, Dave G3WCB IO91RM
-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Dimitrios
Tsifakis
Sent: 02 July 2013 00:39
To: [email protected]
Subject: Re: LF: WSPR-2 on 630m last night
Hi Stefan,
VK dominates WSPR in numbers but not in records - yet! :-)
I have been busy with university homework but that's finishing now, so
I will get busy with radio again. My latest experiment is a very
simple WSPR-2 Arduino/DDS/Class-E transmitter. The web page below is
work in progress:
http://people.physics.anu.edu.au/~dxt103/472/wspr_tx/
I have also been doing some tests with a very restricted antenna just
to prove the point that a super large antenna is not the only way to
enjoy the new low bands. Last weekend I did a quick test with the WSPR
beacon from my block of land outside Canberra, using the earth dipole
antenna. I was able to cover 180 km with only 5 W and I know what to
do to improve this. Can't beat a ground antenna when it comes to
convenience!
73, Dimitris Vk1SV
2013/7/2 Stefan Schäfer <[email protected]>:
> Hi Dimitris,
>
> Am 01.07.2013 06:02, schrieb Dimitrios Tsifakis:
>
>> Not only it's winter, but I noticed that VK dominates WSPR on 630m on a
>> regular basis :-)
>
> Are you sure? :-)
>
>
>> There are plenty of stations monitoring, from all over the country,
>> including, from time to time, one from Perth, Western Australia.
>
> Yes, i see. It is very nice to see so much activity from down under. But
> where are all the ZL stations?
>
>
>> So far, we haven't managed to repeat the VK1DSH->F6CNI record but
perhaps,
>> if the activity keeps to a high level, it's a matter of time until an EU
>> station is received here.
>
> That was a very rare event i guess. But we'll try. Thanks for the
> motivation. BTW soon the LF DX season starts again and Edgar has done a
lot
> of effort to prepare for a new #3 DX WR on LF. I'll try to transmit as
much
> as possible, either on MF or on LF. Actually i should really build an
> automatic antenna switch. Then i can send a MF WSPR 2 block between the
gap
> of 2 LF DFCW-180 elements :-)
>
> Have fun and good luck!
> Any new /p experiments from your side? And how does the tube PA perform
now?
>
> 73, Stefan/DK7FC
>
>>
>> 73, Dimitris VK1SV
>
>
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