Rik, tnx very much. I will test it and am curious about that! That would of course be even the easiest solution for the RX. In 08/2001, Rudi/DJ2EY has published a bandpass filter (4 LC Filters, loose
Hi Rik es tnx for your answer. In the first QSOs from /p I used the TX antenna. I quickly saw that SNR is much better with a 6dB attenuator. In the last activity I even used 20dB. But the SNR of the
Hi Rik! Tnx for your explanations. So, perhaps my RX SNR could even be increased by more attenuation, that would be fine. I thought the most of us using a separate RX antenna, like the PA0RDT design
Dear Lowfers, Yesterday i saw the extreme influence of my 100m vertical tx antenna to the small active antenna. Now I have some ideas how to avoid that and would be thankful for any comments and hint
Hi Lowfers, Now, Bernd has posted the circuit of his preamp for active antennas: http://www.mydarc.de/df8zr/lf-active-antenna.pdf It’s nothing fundamental new. But it’s just working very
Hi mal, There is also a dependence of time. I am sure you can put 1000A to a 10A Fuse, when time is short enough. I adiabatic cases it is a function of the thermal capacity of the fuse, the fuse wire
Dear LF Group, Thanks for your statements and ideas! Horst/DO1KHS asked about the cable. The type of cable I use is CWKF-1001E22 that can be ordered e.g. at cunz electronis distributor. I just had a
LF, Tracey found the mail i meant, mni tnx. So, agn the infos abt cable and so on, below.... (It is one possibility, other cables may do it as well...) Stefan/DK7FC Von: Tracey Gardner [mailto:tracey
Hi Andy, Isn't it, the ERP is I^2*Rrad*1,83, if we assume a vertical antenna? 73, Stefan ________________________________ Von: [email protected] im Auftrag von Andy Talbot Gesendet:
Vy fine signals, also in the QRSS3 RX mode! Ed, perhaps we should try it rather in the evening. Perhaps ur sigs were to weak for my RX at 15UTC... 73, Stefan/DK7FC <<winmail.dat>>
Dear LF Group, Yesterday i have tested a new preamp for my RX Loop (44 turns, 85cm diameter, 3dB BW<1kHz) with the BF862 (http://www.datasheetcatalog.org/datasheet/philips/BF862_3.pdf ) that is very
Hello Roman, Tnx very much for your reply. Well, the distance to me is abt 3400km and i am optimistic to reach that in DFCW3 or DFCW10, if necessary. Please, can you ask him, if he is interested in a
Dear LF group, There was poor wind the last days but tomorrow in the afternoon (starting abt 16 UTC) it could be enough and so i will try to be QRV /p in JN49IS again. Would be happy for some (new) c
Hi Alan and LF, I know there are some of you who can easily answer my question that follows :-) The maximum distance of the groundwave at a specific fieldstrength E is (about) linear increasing with
Hi Mal, LF, That sounds good! So, you can be sure that you have some dB more RX level or better said SNR than others. That's why you can do it in CW/QRSS and others not. But if the others do it e.g.
Mal, i think you know what i mean ;-) The ground- and wire- and coil-losses, or the overall antenna system resistance (which is hopefully not almost the same) that has to be transformed to 50 Ohm. Or
Hi Markus and Marco, TNX both of you for the CW QSO. Also Hans/DK8ND. 4xCW in one /p session, thats a record for me ;-) @Hans: Sorry, i saw your Call in QRSS in the afternoon but the wind was to unst
Dear LF, Does anybody know something about UA9CS? Has anybody already had a QSO with him on 137? I see his call often in the 137 kHz dx Cluster and already asked for a sked (per email) but get no ans
Congrats to ur RX, Dave! Stefan/DK7FC ________________________________ Von: [email protected] im Auftrag von Dave G3WCB Gesendet: Di 12.01.2010 22:34 An: [email protected]
