Hi G, No, i've made to many modifications from time to time. There is no up to date schematic. But, it is a typical design. A suitable band pass filter, impedance converter matching to a SBL-3 mixer.
Hello G, As far as i know, the dynamic range of these dongles is not suitable. 60 dB may be nice for playing arround but if you want to have a real RX for weak signal detection, something serious whi
Wow, quite respectable. Sea water may have helped a bit here :-) I bet it is also possible to have detections from EU stations in SA, e.g. at YV7MAE, who is in a perfect location! 73, Stefan Am 18.08
Hi LF, It's time again to try attemps to leave traces in VK. Edgar is running his grabber at https://dl.dropboxusercontent.com/u/101251787/testIDC.html Starting 18:30 UTC, i will attempt to leave a t
Hi Fausto, Am 21.08.2015 15:39, schrieb Fausto Coletti: Hi Stefan, It would be interesting try to transmit a robust CW signal on 472 KHz, eventually with a lambda/4 kite antenna on the saltwater. Yes
Hi Joe, Try in DFCW-180 without an antenna or just with 5 cm of wire. Would be interesting :-) 73, Stefan Am 21.08.2015 18:13, schrieb Joe: Hi Stefan, thanks for the warning I´ve reduced the se
Am 21.08.2015 21:43, schrieb John Langridge: Out of curiosity, are most stations in Europe using directional RX antennas or only omnidirectional/TX antenna? Most of us here state side that have mad
Am 21.08.2015 21:59, schrieb Fausto Coletti: fly only 20 minutes with one Kg payload. A kite or baloon is better. On the north sea, a kite is definitively better! Seriously speaking, the difficulties
Hello Spiros, Halldór, My compliments. Not bad!! It is a serious path. The season seems to begin slowly :-) 73, Stefan Am 22.08.2015 08:10, schrieb SV8CS-Spiros Chimarios: Last night WSPR deco
Hi MF, So far the band seems to be clean (no strong QRN). However there is strong QRN is Tasmania on Edgar's grabber. So i will stop my LF transmission soon and will then QSY to MF, trying to get som
Hi Eric, Am 23.08.2015 21:51, schrieb Eric NO3M: [...] WSJT-X (which also now includes WSPR with two-pass, signal subtraction decoder by K9AN). Does this have any advantage i.e. a better decode perfo
Eric, Am 24.08.2015 00:57, schrieb Eric NO3M: Stefan I think the decoder "sensitivity" is still the same, however, the two-pass method employs signal subtraction on the second pass, removing signals
Hi Eric, Just looked at http://physics.princeton.edu/pulsar/k1jt/wsjtx.html for the latest version. But here they talk about future plans. The new version 1.5.0 does not include WSPR. Where did you d
Am 24.08.2015 07:13, schrieb Eric NO3M: Edgar, et.al. That version (revision 5499) would be fine for having a WSPR-mode enabled WSJT-X, however, the two-pass decoder did not get added until revision
Hi MF, My MF remote grabber is back on air. I'm now testing a prototype configuration of the stereo RX. So far ist is one channel using the loop. The main goal is to confirm that the design works wel
Hello Alex, Thanks for sharing your ELF/ULF holiday adventures :-) I remember the dark blue website background colour from your other experiments in 5X and JT :-) Congrats for your TX and RX success
Hi Alan, Yes, that's a good explaination. I noticed that first decodes at TF3HZ happend quite late last night. Reports on high distances (> 1000 km) were rare, as if there would be high QRN! 73, Stef
Sometimes i think that electronics is art! Women wouldn't agree, probably. But what i like is a compact and colourful combination of parts. Experts can even read more from the picture, they can see t
