Dear Roger, LF Group, Just wondering if anyone has done the maths to work out what sort of ERP could be expected at 8.97kHz with, say, 100W to a smallish loop antenna in the garden? A 10m x 10m, 100m
Very many thanks for this analysis Jim. It does suggest there is some mileage in this approach. As you say, with the Marconi there are many large losses that make it less efficient at 9kHz so the loo
Dear Roger, Jim, and others, regarding the ongoing "VLF loop vs Marconi" discussion, I just can't resist to add in my five cents... In principle, both electric and magnetic antennas follow the same s
Hi Jim, LFers, Would the oil-filled motor run caps work in this application? If so, they are readily available and inexpensive. 73, J.B., VE3EAR LowFER Beacon "EAR" 188.830 kHz. QRSS30 EN93dr
Roger We have gone beyond the few watts and uW stage and should now be thinking about Kilowatts and at least mWatts erp. Several hundred watts and balloons or kites must be the next stage with the in
Dear Mal, LF Group, You wrote: ....each individual QTH will be different. In a discussion like this, one has to assume a level playing field. Discuss each antenna in the ideal environment THEN consid
Mal, in our context, magnetic stimulation should not be a real problem. Around 9 kHz, ICNIRP guidelines (which do include a large safety margin) allow 24.4 A/m for occupational exposure and 5 A/m for
Markus On health grounds I will leave loops alone. Your closing paragraph refers de mal/g3kev -- Original Message -- From: [email protected] Markus Vester To: [email protected] rsgb_lf_
In fact, several people used loops successfully on 73kHz, and some distance records were achieved using these antennas. My own experience was that a loop was as good as a vertical but only in its bes
