Hi Jacek, Yes I have been collecting thermocouple meters for about 60 years. The problem with them is they are very fragile. In the UK it is generally the case that any meter offered is usually of 19
Hi Wolf yes the problems of unknown cores noted. Thetypes supplied in the kits have been tested. We have not seen fracture but if you modify the circuit for higher power it is a point to bear in mind
Hi Hugh thanks for that.......I dont have a power source at the moment.Yes they would probably just survive 2A but certainly not 10.The solution then is to increase the number of turns on the ferrite
Thanks Mike that is very useful after Hugh flagged up the diode voltage problem. It has the added advantage of not being as ragile as a nice thermocouple meter. You can thus save those for more contr
Hi Stefan does EbNaut give you some kind of S/N for these frequencies??. I am interested to know whether the noise reduces with a depressed Dst index or whether the S/N is sensibly the same in the fa
Hi Stefan, Ah yes of course, for some reason I was not thinking of lightning ...even at this time of year ! There is always a certain amount of it within 3000km so out of area noise is irrelevant. Ke
Hi Roelof nice plot thanks. Yes this was a Class X2 by far the biggest flare for some time. Alan G3NYK Hello all, Now something different: It looks like a severe radio black out of HF is ongoing. I h
Hi Rik without checking I think you are right the downward slope of the last cycle seems to come to mind. It doesnt look as though the GEOS sensors saturated so the flux value should be about right.
Hi all I have just received a warning from NPL about an MSF shutdown. The transmission breaks refer to all frequencies on the site so the Naval 19.6kHz will also be off during the designated period.
Hi Roelof, I have in the past discussed these odd polar paths with Laurence. One though is a 'location filter' consider a path where the transition through the auroral belt happens to coincide with a
Hi all I have taken the liberty of copying this from the yahoo group for those who dont receive that one. Alan G3NYK -- I am transmitting WSPR on 475.768 kHz beaming NW to Europe every morning starti
Hi Luis, You will probably need a trailer tank of liquid Helium to run it :-)) I'll have a look I'm supposed to be a physicist but well past my sell-by date :-)) Alan G3NYK -- Original Message -- Fro
The description is a bit 'odd' Luis :-)) it refers to magnetic radio which is a confusion of terms ....its sither magnetism which is what is needed to flip Rb atoms or radio and the interaction there
Hi Roelof, I checked when Paul mentioned that and notice the Dst was between zero and -10nT. it is not always a good indicator but interesting when it does follow the pattern. I have checked followin
Hi Markus is there a possibility that hard frozen ground at the tx site might give an increase in ERP? Alan G3NYK -- Original Message -- From: [email protected] Markus Vester To: rsgb_lf_group@bla
Yes the skin depth is a point. I was thinking of frozen ground compared with (these days) melting perma-frost, or should we call it imperma-frost :-)) Could be less Rouble trouble the price of oil is
Hi Martin, I would estimate the field strength from DCF39 in your area is about 0.5mV/m (from measurements done by PA0SE in the UK) and from your data that gives about 1.5uV at the RX input as the le
Hi Martin I think Andy has answered the question for me so I wont confuse your with further facts :-)) In the days when I used to pontificate daily on propagation I tried hard to ensure the sensitivi
Michael, there is no 'Admin' on this list server. It is a very old s/w and the lack of acceptance may have something to do with the maximum message size (inc attachments) which I think is about 500kB
