This morning I did some tests on the TX antenna. I need somewhere around 4mH to get things running on 136kHz, and found out that the impedance at that point is around 135 Ohm. Also discovered somethi
Hello just finished my first TX-tests with low power. Exciting!! The antenna currentmeter didn't work, so I had to use a screwdriver with build-in neon bulb to tune, hihi. I also found out that, that
Hello all, I will do some tests to check my TX system and to get some reference values at my home. Roughly between 20.15UTC and 21.00UTC I will be on the air on 136.1kHz tuning and running CW beacon
This evening my low power testbeacon has been received by Klaas, PA0KDM over an distance of 43km. It was quite exciting to hear my own beacon back over the telephone! I was running around 40Watts out
All who tried to pick up my signal: thanks for trying! I hope to improve the antennasystem, and after that I will fire up the big one. Meanwhile I will post a mesage when I intend to do some tests. M
Hello all, Today changed the groundsystem, resulting in an 4-5dB stronger signal. I am using an trafo , diode and meter as an indicator to tune the coil for maximum antenna current. In this list I of
Thanks Mal, G3KEV for reporting about receiving my test beacon this afternoon. I am very very happy to see that the signal was received that far away. Best heard distance sofar. Today I changed the s
Hello all, This afternoon I aded 2 groundrods of 3m each to the system. Although antennacurrent is higher now, my signal did not seemed to be stronger........... Alan told me already in an mail that
Hello all, Everything is ready for me to make QSO's on 136kHz! I will firing up to "big one" today afternoon; exact time is not sure yet, and also the duration because they expect thunderstorm later
Hello!!!!! After more than one year of building, testing, rebuilding, questioning etc I finally became QRV today on 136kHz. This afternoon I was QRV from 12.00 to 14.30UTC, and I was able to work the
Nice DC input of around 500Watt, and high antennacurrent over 1 amp. Really operating at the limit of the protection circuit, hihi. Unfortunatly (due to easter?) very poor activety. I called CQ for o
Thanks for the help everyone. I'm happy to see that my TX-signal is good; so I don't have to bother about that anymore. Well, I had quite high noiselevel that morning, so that might explain why I cou
A question, especially for our German members. Epcos makes (big) cores of so called N30 material. I previously used an 58mm core to match 50 Ohm to 135Ohm, but it got really hot at around 400-500Watt
Well that might be the answer!!!!!!!! I am using 15 turns of 2.36mm wire. The 50 ohm tap is at 9 turns. I will try again ith more turns of a bit thinner wire to see what happens. Thanks Niels! 73, Di
I wonder if anyone here has experience in using a low long wire as TX antenna on 136kHz. I'm thinking of around 400-500m long wire at 1m above ground. I still have a lot of 'portable'beverage stuff l
Well thanks all for the usefull info. I was thinking of running that from a portable location out in the fields. As an RX-antenna it is ok, but for TX I have to find something else, like a portable v
Hello, I will go to my TX-QTH and do some tests with a new coil. I plan to be QRV from around 17.30 to 18.30 UTC today, and I will call CQ in normal CW as well between 136.2 and 136.8kHz Maybe I can
Hello all, Tonight I tested the new 50>135 Ohm transformer made as Niels, OZ8NJ suggested. It worked perfect! no core heating anymore! Nice antenna current too.......upto 1.5A with almost 600W DC-inp
Wondering how much interest there is among the listmembers to work LX on 136kHz. Anyone needs this country on 136?? We'll go there with some PA's later this year, and I'm thinking of taking my 136kHz
Hello, I'm planning to built a bit stronger station for 136kHz to take with me to LX later this year. I already have a 300W TX, design G0MRF with 2 FET's. I came across the design of G3YXM with 4 tim
