Hi Alan, ...you know what I said about the bugs creeping in as the code increases!! Hihi.. Yes, I think it is an exponential function (at least!). When the code exceeds a certain critical mass, it is
Marcus, I don't know how much better Litz can do in your case but the winding length is also important for efficiency. If I remember correctly, best efficiency (power transfer) is achieved when the w
Hi Alan, I think the reactance value is a little bit off. It think that the accuracy can be improved somewhat by placing a 'k' to the left of the word 'Ohm'. Summer returned to southern SM today afte
Michael, I didn't say it was 3F3. I am sure it was a 58mm 3C85 core. The colo(u)r may look like orange in the picture but in reality it is red (I have the xfmr in my hand right now). I may be mistake
Hello Rik Ferrite (as opposed to iron powder) is best for power transformation on LF because of its high permeability, fewer turns = less copper loss. Iron powder is better for resonant circuits and
Stewart, does your Jason decoder try to keep track of symbol timing or does it only wait looking for the next transition (as the native decoder)? If timing is important, how will slight timing errors
I implemented an 'Hendrixizer' Thanks Alberto, I love the word! I am looking forward to see it in radio DSP literature together with Weaver, Hilbert, Hamming, Costas & Co. 73 Johan SM6LKM (still laug
Good evening Wolf & All The 7 MHz signal suffers from multipath, every Jason symbol (tone) now consists of two peaks separated 50..150 mHz (m=milli, M=Mega, the European way). The decoder doesn't lik
Hi My Jason beacon is now down because of a thunderstorm. More thunder is expected tonight so the beacon will remain QRT until tomorrow. Yes, I can turn it but not now. I am busy with other duties. P
Thanks to Walter G3JKV and Bernd DF8ZR for the reception reports. The beacon will keep running for some time. I'll let you know when I shut it down. Center frequency: 7000.013 kHz (*) Jason TX mode:
Uwe, thanks for the screenshot from jo43sv. 10 dB QRO was enough. Apart from the "CX" at the beginning, it is solid copy. If/when I get a reception report from the U.K. I will start to reduce the out
Hi OK, another test tonight and I may even forget to turn it off at bedtime ! Nil copy here (unless the message is very obscure), see attachment. Still nothing on 7000.003kHz I have QSYed to 7000.013
The curious thing is that if clipping occurs before the signal reaches the sound card, the results are better than if clipping occurs in the sound card - I would expect the effect of clipping would
Dear Jim, thanks for "listening". [...] I would suggest QSYing up 10Hz, which would put you in the clear. Thanks for the suggestion. I will put it on 7000.013 kHz and also add a class D "pair of boot
Hi Bernd, Andy Is number 5 still alive, hi? By USB, do you mean the frequency specified is the carrier and the centre 800 Hz (or whatever) higher, or is 7000.003 the centre of the transmission ? I'm
Hi I am experimenting with Jason on HF and I have a tiny beacon running Jason on 7000.003 kHz (USB). The beacon is GPS disciplined and should be accurate to within 1E-10 or so. The output power is 1.
Hei undrer hvor mange som er aktive på 136kHz i Sverige? Hej Jan-Martin, SM6BHZ är mycket aktiv just nu. Förutom jag själv har SM6PXJ, SM6OEW, SM7EUF (?) och SM3UWS varit i luften, kanske fler. Jag
