Hi Andrey, Perhaps it is an idea to use 2 wires in parallel as the antenna wire. If you connect the two wires together at the end, you have the possibility to fed a DC current to the wire to melt the
Hello Peter and thank you. This was my first mail to that subject ;-) But we have found it now, as you can see. Tnx for the efforts! Stefan ________________________________ Von: owner-rsgb_lf_group@b
Hi Roger! Tnx for your point of view. I do not disagree you but... ;-) WSPR will give a good experience of the propagation and what can be done with a given station and thus it can be useful to incre
Hi Alberto, Tnx for reply. Let us know about your loop preamp if it is finished. I already have ordered 10 pcs of the BF862 for my active E Field active antenna! This FET is MUCH more sensitive than
Dear group, Now i am asked if i can give any informations about the fibre optic cable that i use. I have written a mail to the reflector in december 2009 with all the informations about that. But i h
Dear LF, It is so nice to see so much activity on 137kHz! Congrats to DF6NM for his fine QSOs! And to M0BMU, IK1HSS, EW6GB and all the other active OMs :-) I am envious that i am not qrv this evening
Dear Group, I just study some interesting articles about low noise transistors and OPAs for amplifier applications and found that article very interesting: http://www.janascard.cz/PDF/Ultra%20low%20n
GE, ...but it will increase the PD inception level due to the high epsilon r and so you can run more power (voltage) ;-) You should use this advantage ;-). But be aware that the increased current doe
Hi Rik, Yes, this was a clear example. Those who are building their station themselve are rather the true amateurs, of course. That is one of the reasons to be qrv on LF, there are people who know an
Ok Jahan, tnx. I do not use an output transformer in my E PAs, rather a simple coil (which becomes the biggest part of the PA on 137kHz when losses should be less :-) ), i mean a LC transformer. OK,
Dear LF, Some OMs informed me, that the picture of the loop preamp is in a strange design. That may be come, since i (have to) use outlook exchange (?) Now i try to do it again. Those who asked for t
Dear LF, WSPR offers new dx records for all LF stations, sure. With QRSS/DFCW it is the same, compared to CW. Perhaps some stns will successfully do TA QSOs nw in wspr, congrats! What will happen if
Hi Ed and mni tnx for the picture!!!! That is the maximal distance from which i have got a RX rprt!! (2233km). And just in DFCW3 ;-) Sorry Ed, in the afternoon the wind was very unstable and so i had
Mal, Can you explain your RX equipment, pse. Perhaps you can even see/hear what others just can decode? Is your TX antenna your RX antenna as well? What about your local noise level? Would be interes
Dear LF, Wonderful, that good activity theese weeks! But what about the summer? I haven't been qrv in the summer yet. The qrm, how much stronger is it? Just some db or is a qso in cw or qrss almost i
Hello Chris, I am not a communication engineer (but a power electronic engineer ;-) ), so rather an amateur in this field. So my answer is kept simple ;-) In the datasheet of this cable i just found
Hi Alan and tnx for your reply. (also the other stns who confirmed that the pic was correctly sent now) A bigger signal? You mean more Drain current? That is possible (up to 75mA for this Diode) and
Ossi, tnx for transmission yesterday in the night up to 2 o clock! In the moment i built my first own RX on a ham band ever with very satisfying results. I used ur sugnal to compare it to the K2. Scr
Hallo Gerhard, Gratuliere zu dem Grabber. Ich nehme an, du bist oft mit OE5ODL zusammen am testen? RX und Ant optimieren? Was macht die Station und die PA? Würde mich mal über ein QSO freuen, hatten
Hi Johan, What are you planning? This sounds like QROO? Why using a push-pull class E stage when a single stange can do it? I am interested! :-) Stefan/DK7FC ________________________________ Von: own
