Dear LF Group, I was QRV on 73k this morning, and had a QSO with G3XDV, and PA0SE cross-band 73k/136k. I also heard excellent 599 signals from G3AQC, but Laurie seems to have problems on the RX side,
Dear LF Group, I had to give "my" cherry-picker back to it's true owner over the weekend, who needs it for work for an indefinite period. So unfortunately I am now without my high antenna support, un
Dear LF Group, I received broadcasts at 0830 and 1230utc from SAQ yesterday, using a tuned 3m loop and RA1792 receiver with 300Hz bandwidth. Both broadcasts were RST 599 QRN. The atmospheric noise le
Dear LF group, As half the circumference of the globe is nominally 20000 km, then propagation between ZL and EU does not have a lot of difference between long and short paths. The antipodean position
Dear LF Group, Looking at the Europe 1 web pages suggested by F1TAY, and if my understanding of the french is correct, the 183kHz signal is transmitted using a 4 element array beaming south west on a
Dear Bob, John, LF group, I heard the Russian station on 171kHz for the first time last night - it shut down at 2000 utc as John says, but was only audible from 1900 at my QTH, which might have been
Dear Bob, LF Group As I think I mentioned a while back, there is a quiet-ish segment in the LF broadcast band, some hundreds of Hz wide centred on about 172.0kHz. The sidebands of the adjacent broadc
Dear Brian, LF group, My RA1792 also has a 100kHz IF output; it is generated by a module that sits in the place intended for the ISB option. I have no documentation for this module - but I had a peek
Dear LF Group,<br><br>Alberto wrote:<br>>It seems that the CFA Antenna now has a new incarnation,<br>>under the name 'EH Antenna'.<br><br>>Look here : <u><?color><?param0000,8000,0000>http://www.netc
Dear LF Group, I have booked my tickets to the Windsor convention and the DX dinner - I'm not sure yet if I will be able to come on Sunday, but will definitely be there Saturday. I see there is a dea
Dear LF group, <br><br>I have now made a total of 155 field strength measurements on 135.923kHz, all using the same antenna with 2A antenna current. I suspect this is the most detailed FS measurement
Dear LF Group, Just wondering - who from the LF group is planning to go to the Windsor convention this year, and is anyone planning to go to the "DX dinner" on Saturday night? Cheers, Jim Moritz 73 d
Dear LF Group, Thanks to Brian and Alan for the reports on my test signals on Saturday night. I was trying out my new field strength measurement system as a prelude to doing some more antenna tests t
Dear Alberto, LF Group, I recorded a .wav file of the SAQ broadcast yesterday. I checked the frequency using Spec Lab, and the calibration factors I use for Wolf reception. The frequency wobbles arou
Dear LF Group, I received the SAQ broadcast at 1515utc today - it was 599 again, and contrary to other reports, I thought there was a little less QRN than during the July transmission. I also tried m
Dear Alan, Bob, LF group, Distributed circuits like the spiral top load can have many modes of resonance, so one might expect complex behaviour. I remember having a difficult time trying to predict t
Dear Peter, LF group, I also got one of the Decca loading coils - mine was from the scrap pile at Puckeridge, and was of the old type with the difficult-tosolder litz and the former solvent glued tog
Dear LF Group, Thanks to those to commented on the antenna loss measurements. I added the data from ZL2CA, and also some provided by G3NYK to the graph of results from my own antenna (see attachment)
Dear LF group, To try and gain a bit more insight on the functioning of small LF antennas, I measured the loss resistance of my inverted L (8m high, 40m long) over a range of about 9kHz to 553kHz. I
Dear Martin, LF Group, For relatively low powers like 100W, a loading coil wound on about 100mm dia PVC tube using about 0.8 or 1mm diameter enamelled wire is fairly satisfactory. It is not the most
