Hi Daniele, You wrote: ... Yesterday evening a purchased a bunch of 7 x MU400HH ferrites (10mm x 200mm each) on eBay, planning to join them together "in parallel" to form a fatter rod, no idea if it
Dear Daniele, LF Group, Regarding bandwidth, the first thing to note is that the same principles essentially apply to both air-cored loop and ferrite rod cored loop antennas - the main difference is
Hello Jim, LF, thanks to all of view for feedbacks to my inquiry. So my rough summary is: - small-size (e.g. ferrite cored) loops need tuning = high Q to provide a reasonable signal level. - interme
Hi Peter, LF, is a specific type of wire recommended (or not recommended) for the coil? Best regards Daniele From: pws <[email protected]> To: [email protected] Sent: Tuesday, August 3
Hi again Daniele, I forgot some words about shielding. Do not use solid sheet. I just built a small receiver for rtty at 147 kHz for weather report reception when sailing. Using a fine looking u-shap
Hi Daniele, Fine! Yes, a nice field to play on. And if a sensitive /p antenna comes out, this is ideal to coming LF with a nature trip ;-) 73, Stefan Am 30.08.2011 13:53, schrieb Daniele Tincani: Hel
Hello Stefan, Thanks a lot for your feedback. Yesterday evening a purchased a bunch of 7 x MU400HH ferrites (10mm x 200mm each) on eBay, planning to join them together "in parallel" to form a fatter
Hello Peter, very helpful information! Thanks a lot. BTW, I downloaded the Pelgrum's work days ago. I will read it carefully before starting my loop construction. Best regards Daniele From: pws <pws@
Hi Daniele, Could it be possible to tune a ferrite loop over a frequency range as wide as 100-500KHz? Or at least over the EU NDB band (say 300-500KHz)? Any practical suggestion (and/or references on
Dear Peter, LF Group, I would be interested to know what method you used to determine SNR for the different rod configurations. In my experiments, the difficult thing is to measure the noise level of
Hello Jim, LF, thanks to all of view for feedbacks to my inquiry. So my rough summary is: - small-size (e.g. ferrite cored) loops need tuning = high Q to provide a reasonable signal level. - intermed
Hello Stefan, Thanks a lot for your feedback. Yesterday evening a purchased a bunch of 7 x MU400HH ferrites (10mm x 200mm each) on eBay, planning to join them together "in parallel" to form a fatter
Dear Daniele, LF Group, You wrote: So my rough summary is: - small-size (e.g. ferrite cored) loops need tuning = high Q to provide a reasonable signal level. ...Or a more sophisticated preamplifier d
Hi Jim, You wrote: ... I would be interested to know what method you used to determine SNR for the different rod configurations. ... Simply by going the broadband way and using a very low noise, very
Hi Peter, try a BFP640,rBB 1ohm.Noise as low as 300pV/sqrt(Hz) is possible.Very cheap,but one drawback,Ft is about 40GHz,not easy to get stable.For topband I use BD139 (yes a lf driver),rbb 1,2 Ohm,v
Victor I am having the opposite experience with my antennas. I have to insert Attenuation to avoid overload to my Receivers. Now QRV tonite on 136.5 cw es 137.7 qrs3 de mal/g3kev topband 1nV/sqrt(Hz)
Hi Daniele, Very accurate measurements had shown that Litz-Wire is better especially down at low frequencies <1 MHz. Especially MRI-builders reported positive effects. Myself I never could find a con
Dear Peter, Victor, LF Group, Thanks for the info... unfortunately the wide-band type of loop is not really viable at my QTH due to the 10s of volts/metre from the nearby broadcast stations. try a BF
Hi Victor, You wrote: try a BFP640,rBB 1ohm.Noise as low as 300pV/sqrt(Hz) is possible.Very cheap,but one drawback,Ft is about 40GHz,not easy to get stable.For topband I use BD139 (yes a lf driver),r
