No formulas but the DOS program in question is there for download. http://www.g4gcp.co.uk/antenna/download.htm If it's a problem to run the DOS program the used formulas can be extracted from it. 73
Here with Perseus SDR the 100Hz sidebands are decoded between -37dBc and -41dBc (below the shifted carrier) if the SNR exceeds +11dB. Maximum SNR was +27dB with Perseus RX (and +31 with the Reuter P
Just checked DH5RAE,who is located about 64km from here. He reaches up to +25dB SNR,also without decodable sidebands since this season. Obviously he has improved the filtering of his PS because in t
Hi Dimitris, I've made a calculation based on your data with the mini ring-core calculator and it says µ = 1070 and AL = 937.5nH /N^2 So your first calculation seems to be right. 73 Clemens DL4RAJ
Hi Dimitris, The cross section of the rods or equivalent toroid is 2cm x 10cm. If you take 10cm as height the ring is 2cm thick. Hence the OD/ID difference is indeed 2cm not 4cm... 73 Clemens DL4RAJ
Hi Claudio, If you have the usual configuration TX->LPF->SWR_Meter->Antenna the indicated SWR will NOT be spoiled by returning harmonics because they are attenuated by the LPF and reflected into the
Hi Mal, congrats to your TX DX results. However,I haven't seen any RX WSPR DX spots from you in the data base since a long time. 73 Clemens DL4RAJ =link&utm_campaign=sig-email&utm_content=emailclient
Hi Lubos, Aah,good to know. :-) I noticed your callsign several times when checking the database for T/A spots but was not aware anymore that OK2BVG is YOU. Your loop seems to perform quite well. Whi
Hi Lubos, thanks for the description of your improved TX and RX antenna. My antenna is a fullsize halfwave dipole at 8m height at the feeding point, ends go up to 10m /15m height. It is fed by 42m ba
Hi Stefan, so far I seem to be the only spotter. 73 Clemens DL4RAJ 2019-01-25 16:58 DK7FC 0.475683 -23 0 JN49ik 0.01 DL4RAJ JN68kj 326 109 2019-01-25 16:52 DK7FC 0.475683 -21 0 JN49ik 0.01 DL4RAJ JN6
Hi Stefan, it would be interesting if you could measure the upper and lower frequency where the antenna current drops by 3dB, Then the efficiency of the loop including the influence of its environmen
Hi Markus, I've done some simulations with EZNEC 6+ which can simulate also small loops with reasonable accuracy due to its built in double precision engine which can optionally been engaged. For fre
Hi all, last night I got exceptionally good decodes in WSPR. N1DAY,KC4SIT and AE2EA got no other spots in EU and only one station in UK (GM4OAS) spotted these. 73 Clemens DL4RAJ Timestamp Call MHz SN
Hi Gus, good copy with 49 in southern Germany JN68kj . I've sent you a mp3 file. 73 Clemens DL4RAJ -- Original Message -- From: [email protected] Gus To: [email protected] rsgb_lf_group@blac
