I have a question for you all. I am implementing both in Argo and Spectran a function that will display the relative level (in dB) of the spectral lines when you hover the mouse cursor over them. So
To avoid panic amongst QRS users : the next version will compensate for the changing value of light speed when calculating the length of a dot ;-) Rik You come second, Rik... Argo has already a buil
[snip] The problem is the discrete time the DDS uses. The high order bit only changes at the clock edges. The result is a square wave with heavy phase jitter. For example, draw a sine wave (3 waves)
NO Think again, the high order bit of a DDS output is very definitely not a squared up version of the fundamental ! Used on its own it would have a spectrum not totally unlike noise. I thought again
Unfortunately the Windows designers decided that they were next in line after God and that the simple guys writing software had no longer the right to access all these 'goodies' ... Your knowledge of
[snip] 3. If Alberto could adapt ARGO and let the 'time markers' also appear on exact multiples of 30 seconds (or 1 minute etc..) and eventually replace the 'time ticks' at the bottom by thin vertic
Then I abandonned software timing by using an external interface (a PIC) on the serial port and ended up with something very similar to the VE2IQ I/F. A few days ago I was thinking on how to generate
We all have to accept that doing any sort of accurate timing operation on a PC is futile - whether Soundacard, serial port or, even worse, by software timing. Therefore some sort of external interfac
Oh, no ! I have been in search of VMP4 for years .....without luck, and you throw them away...:-( There is no justice in this world ... :-) 73 Alberto I2PHD
Sorry, I confused you all and remembered the wrong device. The valves are E55L Pentodes. (E88CC is a doube triode, sort of ECC88 then they ran out of numbers! ) The E88CC was a professional (military
The best route of course is just to use the serial port to control a DDS - and HF-Instruments has now supplied around 100 suitable DDS modules. Any URL for this ? Is the interfacing described somewhe
Hi all, which would you all prefer as a way to frequency-shift your TX ? With frequency shift I mean many steps, separated by a fraction of an Hertz. The first two possibilities that come to my mind
Hi all, I think that the truth, as always, just sits in the middle. I can well understand the mood of Andy, as often I have myself reasoned along the same lines of thought when watching some programs
In the attempt to further adjust the settings for optimal DFCW reception, this evening (or should I say morning...) I received G3AQC in this way : The single elements are clearly differentiated. Admi
[snip] The most recent version of QRS supports 'time synchronisation'. I am not a specialist in DSP stuff, but my 'intuition' says that the knowledge of the exact start/stop time of a dot can be used
Very good signals from CT1DRP and G3AQC, this latter using DFCW. About DFCW, with the proper settings it is not mandatory that consecutive elements of the same letter should run together. As an examp
Hi Alberto and all, when i was operating a loop as an rx-antenna there was a very close and effective interaction with the loadingcoil of the TX-marconi in a distance of more than 10 mtrs! 73 Alberto
Hi Alberto, de dj8wx/Uwe I guess it has been Wolf. His mail datet 20.03.01: [snip] Hi Uwe, yes, that's the post I was looking for. Thanks to you and all those who sent it via private mail. 73 Alberto
Hi all, I am having quite good results with this sort of setup : my loop is 8 turns, square, 2.2m each side, completely isolated from ground and from the feeding coax. The loop is connected only to t
