There is now a duplicate of my website at www.g4jnt.com in case of any future problems with either; The scrbg one will always take priority for updates. At the moment I'm keeping it as an exact copy
As predicted, my original ...scrbg/g4jnt web site has disappeared due to problems with the server / hosting. Everything can now be found at www.g4jnt.com Andy G4JNT
WSJT7.02 is a Software Suite that includes WSPR. The JT65x and FSK441 modes, the primary ones within that package, are designed for V/UHF. Other modes aimed at use in different parts of the spectrum,
Simultaneous whole band Rx, flat response. And yes, it must be simultaneous 2 - 30MHz By all means come down and sort it out for us if you like. But mine does the job perfectly. Was only speculating
No, the receiver can demodulate all the 6Hz-wide signals that may be present within the 200Hz Rx search bandwidth. The operational Rx bandwidth for receiving purposes is 6Hz, generated by the DSP fil
Hi Peter et group. Sounds an interesting antenna, but for full band Rx coverage I can't see what a folded resistively loaded dipole has to offer over the conventional short whip into a high impedance
If you'd bothered to read the post, you'd have seen it was for a work related task where we want a broad band active Rx antenna for the whole HF band.. Can you tell me how to get any other sort of an
A perfect lossless gound and a lossless (superconducting :-) radiator. Real reductions in gain which appear as increase in antenna resistance come about when the lossy ground terminates the local E f
Just dropped 3dB now - as there are more stns on and monitoring. next drop will be in 20 - 30 minutes Andy G4JNT www.g4jnt.com 2009/1/30 Markus Vester <[email protected]> Dear Andy, if you want to
Direct soundcard to LF upconverter; image reject mixer with allpass phase network for a few hundred Hz bandwidth. http://www.g4jnt.com/LFUpconv.pdf Around 40dBc sideband rejection, so a bit marginal
Keep seeing mention of this WSPR database - feel a Google search coming on. Full locator is IO90IV, or more accurately IO90IV58EI (using GBR36 mapping) or IO90IV58AH (using WGS84) Andy G4JNT www.g4jn
Oh, those things! Have seen them before but never knew the name. Still a few adaptors for them sculling around in the lab at work - somehow they escaped being put into thd skip when we rationalised a
Just realised. The WSPR Software won't accept any-old value typed into the Tx power box. It has to be one from a pull down menu. Nearest options are 23 or 27dBm. Andy G4JNT www.g4jnt.com
Switched off at 2300z to go to bed... I'm looking at code to generate a WSPR signal directly from a DDS/PIC combination controlled from GPS timing When done, it will be possible to leave a beacon run
