Posts tonen met het label Dupe. Alle posts tonen
Posts tonen met het label Dupe. Alle posts tonen

donderdag 10 december 2015

CQ WW DX CW contest 2015

On Thursday before the contest, a fellow HAM helped my to repair the inverted V. The whether was sunny with no wind, so it was nice to work on the roof. We replaced a part of the 300 ohm ribbon, where it was broken and we checked the connections in the top of the Inverted V.
I decided to repair the inverted V, in stead of using the 15 inch cylinder dipole. The dimensions of the Monster cylinder dipole and it's height 4 m above the ground, allow the antenna work on frequencies of 21 MHz and higher. But now I wanted to use not only 21 MHz, 14 MHz and 7 MHz.

It was great. On Saturday I could make a total of 24 QSO's, all with S&P. The inverted V was working very well. Most QSO's were with European stations on 40 m, 20 m and 15 m. Later I made 4 QSO's with North America. In all the QSO's on Saturday I needed the full power of the FT-817, which is 3,6 W on 20 m and 2,7 W on 40 m and 15 m. That I needed "full power", was only a matter of propagation.

On Sunday morning I immediately noticed that the propagation was better. The signals were stronger than on Saturday. After about 10 QSO's with 2.7 W, the signals became stronger. The S-meter went up, so I could make QSO's with 360 mW. In the first QSO with 36 mW the received signal was S9 + 10 dB. This QSO was a DUPE, but I took my change and really enjoyed that OM7M gave a report, so we made the QSO with QRPpp. I very much enjoy this friendly attitude. 

After this QSO, I came on a quiet part of the 20 m band and I made QSO's all over Europe and two QSO's with North America all with just 360 mW. Then I heard a station from Japan. Luckily it was very quiet on the band (20 m) and with the 3th call, the QSO was made with 3.6 W. I did not dare to go lower. 

The next 30 QSO were made all over Europe, with 360 mW, except when I needed 3,6 W. When the signals incidentally went up to S9 + 10 dB, it was possible to reduce to 36 mW.


It was great. I very much enjoyed to work with the lowest possible power from QSO to QSO on Sunday.

vrijdag 4 april 2014

/QRP

I always use QRP, which is 5 watts or less in CW.  But I never use the tag /QRP.
In contest QSO's in CW, I rather send my call a second time in stead of /QRP.
In the BSCI contest I made a QSO with a station that was not in the contest.
I met a station from Guensey (GU) which is rather rare.

The signal was very strong, so I immediately reduced my power to 50 mW.
The FT-817 was set to 500 mW and I switched in the 10 dB attenuator.
The 10 dB attenuator reduces the power with a factor 10.
So my power was 500 mW diveded by 10 = 50 mW.
I received the usual 599 and I was happy to log MU0RGU.

But when I looked again at the S-meter after the QSO, I was surprised by the signal strenght.
Then I realized that I could have made the QSO with 5 mW.
In a contest it's (almost) impossible to make a second QSO (dupe).
But I decided to give it a try, because this was no contest QSO.
I switched in the 20 dB attenuator and gave my call PA1B/QRP, now using the tag /QRP,
now with just 5 mW.
To increase my luck, I decided to use the tag /QRP for a second QSO.
I thought that if I did not use the /QRP, I could not make the dupe, but MU0GRU came back for me
and I could make the second QSO, now with 5 mW. hi
Thanks to the friendly operator of MU0RGU.

I hope to receive a QSL. Until now I received a card for a QSO with 500 mW from Guensey.

donderdag 20 oktober 2011

1000 MPW QSO's in the WAG-contest

On saturday, I started in the 20 m band and made 2 QSO with 180 mW and 36 mW.
The signals on 20 m were strong.
On sunday morning I started early on 80 m and later went to 40 m. On these bands I made a total of 26 QSO's all with 2.7 W. Signals were not so strong.

Then I went to 20 m. The signals were very strong. I started with 360 mW and reduced the power whenever possible. In a few hours I made another 16 QSO's, from 360 mW down to 3.6 mW, with the FT-817 and attenuators of 10 dB or 20 dB. I was suprised by the short skip distance.

In the next picture I plotted the location of the worked stations. You can follow the QSO sequence. Numbers 1 to 18. QSO 1 and 2 were made on saturday and QSO 3 to 18 were made on sunday.


Most of the worked stations are concentrated in 4 areas near large cities in the south and the east of the country. München (Munich), Dresden, Cottbus and Berlin. With a shortest distance of 329 miles.


On sunday I started with 360 mW in QSO #3. I don't count this QSO for a 1000 Miles per Watt QSO, with just 1001 MPW. It is just to close to the edge.
From QSO # 3 on I could reduce the power from 360 mW dowm to 3.6 mW, almost in a staight line. So nearly all QSO's on 20 meter gave more than 1000 MPW.


In this plot I give the QSO number and the power of the QSO for the QSO's around the city of München (Munich). QSO #10 and #16 were made with the same station, DL1A. QSO # 16 is a Dupe that was made with just a lower power.

woensdag 22 juni 2011

More than 1000 MPW eQSL's from the CQ MM DX contest.

Using the lowest possible power in a contest QSO is not so difficult as it seems. In the CQ MM DX contest I was suprised by the excellent propagation, which made it possible to work with stations in South America and North America with just 1 W or 2.5 W.

2 Way QRP QSO with Brasil


After 8 QSO's with 1 W and 2.5 W, I heard PY2WC calling CQ, so I tried 2.5 W.
I fell off my chair when Waldir answered: SAQ, which means that he was using QRP and this was a 2 way QRP QSO. It was only after a few QSO's, also with 2.5 W, I realised that I could have made the QSO with a lower power.
More than an hour later I heard Waldir again and made a second QSO, but now with 1 W (980 mW). Thank you Waldir for a new DXCC in QRPp, thus less than 1000 mW.

Tip: Just make a second contest QSO, with a lower power if you can.
My most memorable very low power QSO with 0.85 mW with RT6A is a Dupe. hi

Confirmed 
"More than 1000 MPW" QSO's


This list shows only the 1000 MPW QSO that are confirmed via eQSL.
I actually made many more 1000 MPW QSO's in the CQ MM DX.

After I receive an eQSL, I determine the distance using the QTH Locator and the Miles per Watt.
I place the 1000 MPW info in the comment field of the return eQSL.
E.g. 2.5 W and 6062 miles to GG66un gives 2425 miles/watt - 73, Bert

Power Overview


Most QSO's were made on 21 MHz.
Although I made many DX QSO's 34% of the QSO's were made with QRPp.
And 70% with more than 1000 MPW.

The Soapbox:

In total I made 56 QSO's in the CQ MM DX contest. I worked SA, NA EU and SA. I had great fun.
My RIG is a FT-817 and the antenne is an Inverted Vee.
I always use QRP, but never a fixed power of 5 watts.


Thanks to all the excellent operators that made this contest QSO's possible.