Hi Mal and all, Surprised to see this made almost in your backyard! Looks awesome, though. Found photos of both versions at http://home.t-online.de/home/Hbusch/ee430.htm 73, Stewart KK7KA I bought a
Hi Markus and all, Interference to LF reception by DSL: The +12 dBm figure is total power. I believe that the spec requires the PSD to be a maximum of -30 dBm/Hz; looks like my modem is running about
Hi Laurie and all, Well, that URL is incorrect, Dex's data is on www.gostanly.com . But the host seems to be down or off the Net; the last responses to traceroute from various locations shows: 9 mode
Hi John and all, A few comments on measuring DSL interference effects: Here in Paris, I have the cheapest ADSL service from France Télécom. Advertised speeds are 512 kbps downstream and 128 kbps upst
Hi Alan and all, Thanks for the link. Another fascinating read, with some awesome charts, is David Allan's "The Science of Timekeeping", which can be downloaded (PDF, 1.13 MB) at http://www.allanstim
Hi Alberto, You are correct that switching supplies usually have R/C oscillators. However, after reaching a stable temperature, and with constant load, the drift could be quite small, perhaps tens of
Hi Alberto and all, I can't explain the blurb, but IMO the rest is mostly noise from an SMPS. This power supply has a full wave bridge rectifier from the mains, feeding a large capacitor. Across the
Hi John and all, I agree that David Weinberger has done a poor job on this article. I don't think that he is confused; he's writing to entertain, not to inform. IMO, most of his examples have serious
Hi Mal, I get a signal indicated sometimes on the TV baragraph but it will not lock. I need some sort of device to accurately point the dish towards the satellite. The normal procedure used for analo
Hi Mal and all, If you can receive an analog program from the same satellite, use that to align your dish, etc. If you have no sparklies, or only a few, the signal should be good enough for digital.
Hi all, Last year, couldn't hear SAQ, because mains frequency QRN here (Paris 6ème) is awful. So today, decided to try a portable radio. Took about 36m of cat-5 cable and made a 9-turn loop about a m
Hi John and all, Can anyone confirm whether this is the intended URL? http://www.qsl.net/mmhamsoft/mmana/ Yes, that is correct, and it is the "official" site. It appears that the original URL or URLs
Hi Hugh and all, You'll hear the negative frequency much better; a lot less QRM down there. See http://ourworld.compuserve.com/homepages/alan_cake/Theartic.htm . 73, Stewart KK7KA Hi Joe, What does t
Hi Eric and all, Dick's post, made with Eudora, contained this HTML fragment: The correct formula is:<br><br> P = 0.0111(E *d)</font><font size=1><sup>2</sup></font><font size=3> in which ... Dependi
Hi Markus, I know nothing about FEI but have some experience with other brands. All Rb clocks wear out, because the lamp gas is lost to adsorption or diffusion. Life is usually 5 to 20 years, dependi
Hi all, Jim solved the noise generator puzzle! His key observation is: The complete story has been posted to http://www.scgroup.com/ham/Noisegen.pdf It's not all easy as pi :) 73, Stewart KK7KA writt
Hi Brian, IMO, there is no general purpose software for this, because there is no standard way that connection status and statistics are communicated to the host. If you have a stand-alone modem, the
Hi Andy and all, I was unaware of H&H, but my previous post gave the same answer. It was based on my naive analysis that white noise was spread evenly from 0 to fs/2, and that the sin(x)/x effect sho
Hi David and all, Just realized that I failed to mention that you also need some gain, because the desired signal is only a tiny fraction of the energy in your .wav files. You can specify gain in the
Hi David and all, Since you already have .wav files, you just need to process the data and play it. Any good audio editor can do that for you. My favorite is Cool Edit. Unfortunately, it was disconti
