Hi Jacek on my own checks it seems to be posters out side the UK who occasionally have trouble ( some ISPs are permanently locked out it seems). I also noticed on the turn of the year there are a lot
Hi Mike I had been watching triggered by a comment from Steve Nichols preparing the RSGBNews Prop report. The Thursday geomag event was much weaker than expected I havent checked but I suspect the IM
Chris my take on this.....not having used this level of power at LF.....if the core is gettting hot it is not providing a particularly high Q !! My line is that LPF are best made with air cored induc
Hi Clemens yes I realised that from later posts I should have realised materials 2 & 3 were iron dust. I doubt from the reports that it is getting to the kind of temperatures that would give non-line
Chris if you are not listening to the same frequency on both you dont want a splitter you need a diplexer. This is effectively two filter with a common input, one is lowpass for LF one is HP for MF (
Hi Clemens I agree with that but the splitter loses you 6dB on both sides against the diplexer :-)) Probably not significant at LF/MF but it can give some protection against out of band big signals.
Hi Chris, no Worms :-)) its just that simple questions often have a ''less than simple'' answer :-)) Alan -- Original Message -- From: "Chris Wilson" <[email protected]> To: "Clemens Paul" <rsgb_lf
Hi Mike I would agree with that. When I started trying to record stations in the pre-waterfall period (DCF, SXV, CFH etc near 136 I had a thick band on the plot around 8 to 10dB wide. I experimented
Hi Jim that would be a good idea, but may not be necessary. I seem to remember that the NATO VLF station in Europe have very stable phase. (Stanford report using phase variation on Jim Creek for SID
Lots of people talk about a ''season'' but in propagation terms there isn't one. you can get as good a propaga tion in summer as in winter. There is possibly less noise to listen to in winter and the
Hi Laurence I think Anthorn is still running though its a slave without a master since Lessay and Sylte closed Trinty house are probably still paying the lecky bill to Babcock Int. I think the contac
Hi Luis that is interesting. I presume signal and spotter were active during the the earlier low Dst period?? I had wondered whether that path might not be so severely affected by electron precipitat
Ok Luis thank you for that, I find it one of the problems with WSPR that one doesnt know when the stations are off-air or spots not loaded, power changed, timing changed. I suppose if one analysed en
Paul Spectrum Lab is very ''technical'' and very flexible. For visual modes download Alberto's Argo. It won't do EbNaut but it has a proud history in LF visual modes since about 2003 it will also ser
Paul and Markus, I was triggered to do a little searching today. (BTW I did NOT say there HAD been US<>EU 2-way QSOs with Warren K2ORS's Part 5 licencees, I just indicated I thought it unlikely there
Hi Alex yes I am sure we all had our bouts of 'unlicenced experimentation' The LF community was so small that anything like a T/A qso would probably not go unnoticed. RU6LAs collection of events was
Paul I think you need to step back from this a little. One point, design/cable routing at 137kHz is normally not that critical and it is unlikely it is having much effect. Many us have ''haywired'' P
Hi Jay yes indeed but I think that the Vds(max) is quite high, and certainly not a prob at 12v, or even 28v. Alan -- Original Message -- From: <[email protected]> To: <[email protected]
Ah I see what confused me.....I missed the first spike which is up to the top of the screen and not so obvious because of the shadow. That is high for 13v but the usual design criterial is to allows
Paul, Chris, Jay et al Just a wild thought....Jays LPF is not inside the PA box. The filter is giving a frequency dependent load on the PA. Could it be possible that some reflected impedance is exage
