Hello Laurence, So far I have made 220 mini-whips and not a single unit has failed due to static AFAIK. As the pick-up element is small, the induced voltage will be much lower than on a conventional
Hello Mal, I do hear it here as well, though it is not present all the time. There are rumours amongst local hams that it is audible over all Europe. 73, Roelof Bakker, pa0rdt Middelburg, Netehrlands
Hello John, I have carefully listened to the recording of NDB's OZN-372 and ODR-372. The upper sideband of ODR-372 is at 372.380 kHz. The upper sideband of OZN-372 can be found on 372.405. Hence both
Hello, G3XVL is 30 dB over my noise floor in Middelburg, Netherlands, locator JO11tm. This can also be stated as arm chair copy on the internal speaker of my AR7030 with the 2.4 kHz SSB filter on. An
Hello all, This morning SAQ was received with good aural copy in the South Western part of the Netherlands. Signal to noise ratio was slightly less than on other occasions; 11 versus 15 dB. Best rega
Visual proof attached. The signal has very little fading, so far no more than 2 dB. 02-12-2007 21:10 UTC Best regards, Roelof Bakker, pa0rdt Mijn Postvak In wordt beschermd door SPAMfighter 548 spam-
Hello David, The pa0rdt-Mini-Whip was designed as a low noise reception antenna at LF, because at my location a loop antenna appeared to pick up to much noise. This type of antenna does work very wel
Hello Laurens, Paul Harden, NA5N has given some information on an other list. The purpose is research of the ionosphere by triggering it by a signal reflected by the moon. The goal of this research i
Hello Luc, Finbar is sending his call followed by a dash. He is 30 dB over my noise floor in Middelburg, JO11tm. However the signal suffers from heavy fading. Best regards, Roelof Bakker, pa0rdt Mijn
Hello Laurie, I have used an ICOM R75 and still own a AOR AR7030. Both are excellent performers at LF. The AR7030 has top notch rf performance but the ergonomics of the AR7030 are a bit unusual. The
Hello all, In practice even a short in regards of wavelength wire on the ground shows good directivity. A 100 m long untermintated wire on the ground is already an excellent antenna from 250 kHz and
Hello all, G0MRF 15 dB over the noise floor in JO11tm at 17:00 UTC. Excellent aural copy. Best regards, Roelof Location: Middelburg, Zealand SW Netherlands, 51 30 02 N, 03 36 02 E Locator: JO11tm Rec
Hello Jean-Pierre, Have you considered using a phasing system? I have had excellent results with a system using an active loop and an active (mini-)whip to get rid of thunderstorm QRN from the Medite
Hello Alberto, Your program Spectran is in wide use amongst NDB chasers. Someone had the following question: Does the quality of the sound card influence the decoding or displaying of signals receive
Hello Michael, Many thanks for the links. I am seriously considering buying a SDR, but have to upgrade my old Pentium III PC first! 73, Roelof -- Mijn Postvak In wordt beschermd door SPAMfighter. 703
Hello Alberto, Many thanks for your help! 73, Roelof, pa0rdt -- Mijn Postvak In wordt beschermd door SPAMfighter. 708 spam-mails zijn er tot op heden geblokkeerd. Download de gratis SPAMfighter via d
Hello all, Just to let you know that I have received the article. Best regards, Roelof Bakker, pa0rdt -- Mijn Postvak In wordt beschermd door SPAMfighter. 844 spam-mails zijn er tot op heden geblokke
Hello all, Thank you in advance. Roelof Bakker, pa0rdt -- Mijn Postvak In wordt beschermd door SPAMfighter. 843 spam-mails zijn er tot op heden geblokkeerd. Download de gratis SPAMfighter via deze li
Hello Lee, The 2N5109 is the best choice, but you can also use a 2N3866 or BFR96S. If you can't find a suitable device, please contact me off list. 73, Roelof, pa0rdt Does anyone know who supplies 2N
Hello Lawrence, All DSP receivers including the Icom 756 Pro 111 are not able to turn off the AGC. I have a PERSEUS DSR which uses DSP techniques for filtering, demodulation, AGC etc. However the AGC
