Hello LF-Group! Less than a week ago I received an experimental permit for 501-504 kHz and 20 W ERP. Test transmissions this afternoon for field strength measurements were received by Mal/G3KEV and J
Hello LF group! Back on the band after a pause I last evening made a short cw call on 500 kHz resulting in a solid-copy qso with Mal, G3KEV. Several reports appeared on the reflector and I do appreci
Hello Gerhard/DK6NI! I wonder whether I forgot to acknowledge your report on signals of Oct. 6th. If so, I apologize! So thank you very much. I do hope to meet you on 500 kHz some time in the future.
Hello LF Group! The International Radio Regulations ("The Bible of Radio Communications") define ERP as follows: (1.162) -- effective radiated power (e.r.p.) in a given direction: The product of the
Hej Paul-Henrik! Så din 600 m log. Min locator er JO65GX. Jeg håber engang at få en to-vejs qso med dig på600 m! 73 og HNY Niels/OZ8NJ+ Correction: The correct time is 1912UTC. At first I deducted 2
Hello lf-group! We recently saw an interesting description of IZ7ATH´s 160-meter EH antenna and with this description came of course the question of whether this antenna could be thing for 136 kHz. T
To save long-winded explanations, I have drawn a circuit diagram of my modified version of the G0MRF PA output circuit, with some details of the output transformer. It is too big to send via the ref
Dear LF Group, I have been considering purchasing the SRA-8 for the first mixer in a new LF receiver I am designing. This is a passive DBM and is fairly expensive. Would I be better off using an SL6
LF, I have just spent three hours trying to find any practical information on the Web on how to wind a honeycomb coil at home. I can see pictures of the finshed coils but without some step by step p
I scanned the whole of that page but all references to "spoler" seem to have become "unspolen" Sorry indeed. Anyway, thanks for your swift reaction. I will see that this problem gets wound up again
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 400-500Wat
For a sinusoidal waveform, the minimum number of turns on a core is given by V(rms) = 4.44. F . N . A . B where V is the voltage across the winding F is the frequency in Hz A is the core cross secti
