Tag Archives: eme

QRV in the ARRL contest 19-20 nov

I decided to put the antennas up and take part in the ARRL contest as the WX forecast was good – specially so late in the winter.

I have had some issues with aiming the antenna as the feedback from the G-5600B has been very flaky – I found out that it’s very likely a dirty pot in the back of the control unit. Then my beloved amp blew a fuse ;).

I’m hearing quite well – but sometimes it’s like people dont hear me!

 

I’m sad to have missed Japan and other Asia stations – but I have houses obstructing the east path to the moonrise! Now there is a clear plan forming to try to get VK/ZL/JA in the 2m EME log! I might have to wait for the moon to be in a northern declination – and perhaps move my QTH temporarily.

From my current QTH I dont see the moon from about 280° – 0 – 80° – and I always have to have at least 6° elevation.

update: Thank you for all your patience ! this was really fun – just under 100 QSO’s total in this try!

All QSO’s logged here on this page: http://www.tf3cy.is/eme-qso

73, Benni TF3CY

Finally – 2m EME success!!

I’m not a single yagi station anymore! After a really disappointing night – only be able to decode one signal I decided to get the other yagi and mount it horizontally. This meant for some last-minute fixing. I found a small carpenter shop that made solid shafts out of oak. I got some cosmetically flawed shafts for little money and they now make the tips of the horizontal boom. I made trusses to strengthen the boom. This is a bit hard for the small rotor but he can manage this. During last night we had pretty strong winds and the antennas where bouncing quite a bit – I was mildly concerned if the wind force would increase as I would not be able to lower the antenna.

I can now add one JT65B QSO to the “long” list of 2M EME contacts!

This was my 2M EME contact #1 and EME contact #4 !!

This could possibly the first 2M eme contact from a TF native station. There are rumors that a another TF station was active some decades ago – but I have never gotten that 100% confirmed.

I finished the QSO with K5QE pretty much without any issues – just sent a wrong sequence once. But from there I could not decode anything – got some shorthands but it was like a total blackout. I visually inspected the heading of the antenna repeatedly – I did a CQ CQ run and got good reports on 100W – But I was unable to hear anything. This was either some issue with my RX or a very bad case of faraday rotation. I did not have a pre-amp installed but that could not explain the really bad RX as I was getting quite good reports -21 to -25dB.

I will use the day to try to get the pre-amp working .

The station is now:

  • TS-2000 – 100W -internal pre-amp
  • 25m CableExperts feedline X-1318
  • 2x 2m5wl
  • Yaesu G-5600 rotor system AZ/EL
  • Pre-amp to be used is from WA2ODO

here are pictures:

6m EME – QRV and QRO ?

I have gotten few emails asking for sked’s on 6m eme.

As my current working conditions are uhm… none – I can’t have a fixed EmE installation at my QTH. So I have this portable setup that I plan to use when I have good conditions.

Good conditions mean of course low degradation – but also as I live on the south-west coast of Iceland, I would like to be able to see the open horizon. So any azimuth to the south-to west would be great – my grid square is HP94 so that will give you some idea how to work me. I will be trying to find a location I can leave the antenna over night, so I will perhaps 3 days I can work the moon.

I will be QRO soon – I’m still waiting for the experimental licence as our normal general class only allows 100W RF. I have asked the PTT to be able to transmit 1Kw RF, hopefully that will be granted. I have a 1200W solid state amplifier I’we nearly built and will be tested in the next days.

so please email me if you want to arrange a sked email is benedikt@ccpgames.com

I’m going to try to work as many good “windows” as possible this summer. Next window I’m looking at is around 12 August – then the moon will be in a good position for me to work the low elevation with good degradation.

6m EmE contact with W7GJ

Today was just amazing. Just few weeks ago I got this crazy notion in my head to try EmE, and that on 6m, actually it was Lance W7GJ that spotted me on a cluster and looked at my locator/location and saw a opportunity. When I got the email from him something just clicked, I had always wanted to try EmE, but always thought it was impossible..

Two contacts where made, W7GJ!  more would have been possible if the problems with the PC-rig had not taken so much time.

So here is the story 😉

I decided to build a 10el yagi, have it portable as my current QTH does not allow large 15m boom yagis, the yagi copied from Pop YU7EF excellent designs (http://www.yu7ef.com/). My brother TF3SG has a portable full size 80m vertical and it’s build quite robust – so I decided to borrow it and use the lower half as a mast for my new yagi. This is just something every ham has to have.. a portable mast on a trailer.

Here are some pictures:

This would never have been possible if it had not been for all the hard work my brother TF3SG put in, both he had the mast and helped me throughout this endeavour. He even went home and got his beloved FT-2000 when I had all kinds of problems with my small TS570. I ended up taping the mice of the FT2000 to a USB headset to get the audio from the PC to the transceiver. Then of course my father TF3T (formerly TF3SG), watching him throughout the years trying to build impossible projects and often succeeding lead me to try this.

We had all kinds of problems, mostly rig to PC related that should have been fixed before the try, but what amazed me was the performance of the beam, first try  SWR 1.1.

I will try to get QRV as soon as possible, but I’m supposed to return to the summer house my wife and kids are staying at – and stop this nonsense 😉

But, this is really what I think amateur radio is all about – experiment – build stuff, break stuff – and use the moon as a reflector!

The location we chose is very popular sight seeing location – so we had alot of visitors asking “What are you doing”, I just said “I’m sending a radio signal to the moon and using it to bounce back so I can communicate with someone on the other side of the planet”, and usually they replied “… haha no, really what are you doing”.

6m EmE – almost

As TF1SIX was spotted on 6m yesterday, weather good, moon in good position, I decided to get my new yagi up to test. I had tons of problems as I did not find the top bracket on the rotor, so I had to make a custom bracket. The aluminium mast material available was only 70-60mm, so it was not the sturdiest masts around.

The picture shows the takeoff to around 200° where the moon was yesterday. Hope the president of Iceland has upgraded his TV equipment and is not using the old 50Mhz transmitter still around. The ground path to the moon goes over the narrow peninsula called Álftanes,  back over the sea, then has to cross 20-30km of the Reykjanes. So the location is far from optimal. I plan to use my brothers portable mast to get closer to the open sea.

3rd picture is from Google Earth, Shows the path the signal takes.

Last evenings tests far exceeded my wildest expectations, I was able to copy Lance W7GJ in  DN27

232800  1  -23  3.7   75  3 *      TF3CY W7GJ DN27           1  10

So now I wait for the next window – and prepare.