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Hi Barry The DDS resolution stated in the AD9850 datasheet is 0.0291Hz with 125MHz reference clock. 73 Hans G0UPL

Hi Colin As Alan said, there's a book see http://hamradioprojects.com/ for the details. People can still build and operate the QRSS Arduino shield without the book. But the book does contain a lot of

Since I added battery backup to my GPS module at the weekend things are more consistent. When I apply power, the clock shows and it's normally accurate to within a few seconds. I put the GPS invert

Well I am still trying to make 8 beans equal 12. No matter how yo look at it there are only 8 distinct levels on 3.5MHz Eddie

Hans has contributed three chapters, including one on QRSS and one on the multimode transmitter shield, to the new ARRL book 'Hamradio for Arduino and Picaxe'. It's well worth a look, it would

I started the 2n7000 wikipedia page! Leigh/WA5ZNU low-power switching applications. The two are nearly identical except that the leads are arranged differently and the current ratings are

Hi Hans and all, I have a couple of questions about the arduino shield. 1: If I run the UNO battery power can I connect it to GND and Vin (as recommend by the arduino website) through your QRSS

I think it is more like 0.08Hz min I have reduced signal level and the blow up of the width, Thing is I cant write on those.:-) There is an anomaly repeated every time on steps 6,7 and 12 where the

On 20/05/2013 08:32, g3zjo wrote: > On 20/05/2013 07:56, Hans Summers wrote: >> I think that at 80m, some of what you observe is just features of the >> decode process on such a strong signal. Can you

Hi Hans The wide line is due to the resolution which I have pushed up, to make it clearer in fact. Yes there is some inevitable spread. Of course I will add some attenuation for you and see what I

Hi Eddie I think that at 80m, some of what you observe is just features of the decode process on such a strong signal. Can you put in some attenuation so that the line is thinner? I think the tone

Hans / Lads I have increased the resolution of my Grabber http://dl.dropboxusercontent.com/u/23312120/qrssgrabber.html for clearer understanding of the step tests. Currently on 3.5MHz band and the

Hi Hajo I see your point but but I see it totally differently. The board layout and silk screen is not WRONG and does not need alteration which would cause confusion. Everything is correct for the

Hello Hans, I was a little bit irritated about the various comments concerning future PCB boards. Your project is not a one night stand. It is here to stay and to get developed by you and the

Hi Hans, Regarding '*_New shop items requests:_*' May I suggest you also make the LPF Capacitors available separately for people who want to experiment with 'Multi-Band U2s' and want to make their

28MHz produced 3 step levels only. 7MHz Step 1,2 OK 3,4,5, are co channel 6,7,8,9,10 OK. Eddie

I think the ramp tests have been very revealing and I'm sure once the maths have been done, a fix will soon follow ;-) Other than that everything else works fine and I'm very pleased to have two of

The Trimble is stated as PPS < ???25 ns @ 50% and werks beaufull. Eddie

Thanks for that Hans, yes I was referring to the shift and thanks for the idea with the extra transistors. 73 Colin

Hans / Lads My Grabber http://dl.dropboxusercontent.com/u/23312120/qrssgrabber.html is showing the Step Test on 28MHz on the frequency indicated. Three levels only are succeeding. Note, every