Good morning Alberto, I have another small problem with build 113 recently downloaded.A signal which produces a good display on build 110 seems to be far too strong for 113.So I have to reduce the s
If you experience difficulties in downloading the latest build of Argo, please be patient. I modified the DNS entries for weaksignal.com, but it takes as much as one full day before the mods are prop
Hi all, I have just uploaded build 113 of Argo. After having downloaded it, please reread the Readme file, as I have added a few (very few...) explanations about the added spectral estimator, and the
Hi Alberto, Can you please send me Spectrum plot of Greek station . The plot should start at 135.6 kHz and end at 136.0 kHz . I am most interested in comparison of 135.7-135.8 segment with the 135.9
john sexton wrote: Hi All, I find the noise spectrum of this station to have the following structure: 135.670 - 135.678 very dense 135.678 - 135.75 density reduces to almost nothing ? 135.75 - 135.76
[snip] Next project is a proper LF receiver with accurate and repeatable signal measuring capability and built in A/D converter to avoid having to use soundcards or external DSP for narrow band work
[snip] I set the receiver to 136kHz SSB USB. Argo, on 'Full Band View'. The band from 136.0 to 137.5kHz can be seen and any signal can be selected and zoomed, a wonderful tool for monitoring. [snip]
Greetings All: There is a very cheap source of very high stability reference available to everyone. It is the 1 PPS from almost any second hand OEM level GPS receiver. I have one here that cost $20
Alberto Many thanks for the excellent Argo. It seems very sensitive and a pleasure to use. I have not checked for the contrast setting problem but there is one small problem on this machine. When th
The TVNZ nationwide network, with two Tv channels, has a Rubidium source for timing. 73, Bob In Italy, the state-owned TV broadcaster RAI has all its timings locked to a central Caesium standard, in
Alberto I2PHD, Alberto, first of all thanks for providing ARGO, I have played around with it and found it very useful. About the coils on 9 kHz: I am using a u-shaped core with a closing bar on top
Hello again Alberto, Many thanks for your reply to my mail. The problem is that if I move the slider away from the start position either way left or right the contrast changes as expected BUT when I
Hi Alberto Stokes original article was re-printed in the old LF Experimenters Source Book, together with another explaining the theory. I built the original circuit. It is very simple and lacks most
Has anybody experience with gyrators ? A friend pointed me at this page : http://www.aavso.org/committees/solar/gyrator.stm which contains the schematic of a VLF receiver where the inductances have b
Hi Alberto, I have a small problem with Argo, if I change the contrast setting while running the program, cannot return to the initial (default) setting without exit from the program and restart. I
Oh -- that explains a lot -- Particularly, why, during testing yesterday of SMT Hell bandwidths and pixel durations, the optimum settings for decoding with Argo seemed to come out with ratios that d
Saturday afternoon I was in the shack and had ARGO running (at 3sec/dot) while being otherwise occupied. at 17.50 I saw a very faint interruped line on 137701, 'T' copy at best. It seemed 10sec/dot
Hi All Although this is the other end of the spectrum from LF, does anyone know the email address for keplerian elements for amateur and other satellites. I use the IT prog with auto load for either
[snip] I tested my bridges by connecting them to a 3 m long piece of RG213 type 50 ohm coax that was terminated by a 50 ohm resistor (actually two 100 ohm resistors in parallel). That produces a sta
Hi all, many Argo users did complain about the fact that the screen capture facility did not work, or better, it worked incorrectly, when the Argo screen was covered by other windows or a screen save
