John asks for details of the Tx set up here:- This consists of a PLL synthesiser driven by a VXO which can be pulled enough to produce 1-2 cycles frequency shift by a small capacitor and relay. This
Hi All, Well I have achieved what I set out to do,so would be happy to stop the beacon now if anyone wants to have a go. But I am aware that there are others who were looking for my signal, Dex for e
Dex asks "is there any blank time between dashes and dots " the answer is yes, the actual element (dash or dot ) is 120 sec long and the gap or blank time is 40 secs. The FFT program tends to blur th
Hi John and all. I will transmit again tonight using 120sec dot DFCW starting at 2300utc.Freq. down a bit ,about 72.4012/3. This time I will be sending full call sign so lets hope for decent condx. W
Thanks John, I will go for the complete call now (dont want any criticism !) Would it not be better to use 90 or even 120sec Argo at your end to ensure maximum SNR.Alternately I could shorten my dots
Many thanks for the congratulations. It has been a long haul involving 3 transmitters,and many nights.My power last night using the Crawley club Decca 200mW ! I transmitted AQC only since I thought t
Congratulations John, I dont think that there is any doubt that the sig's you captured are mine. My dash freq was 72.4013 which compared to your measured freq of 72.4014 is well within the limits of
Hi Jose, I used to have this problem in the house and cured it by winding the phone lead through a ferrite core about 6 turns should do it. 73s Laurie.
Further to Peters experience, I have used the same method:- ie lightly couple a sig gen into the coil (I use a single turn of wire ) resonate to the required freq. and find the 3db points with an osc
I dont know wether anyone responded to Johns offer to listen last night ? the message came through too late for me to monitor (gone to bed Hi ) But I shoild very much like for him to look for my 73kH
Thats very interesting Alan. I had been intending to repeat my original measurments,paying closer attention to the figures,but the recent cold Wx kept me indoors! I look foreward very much to seeing
Thanks Marcus for the screenshot.Its the best I have seen and very readable,the DFCW format certainly does reduce the time required to pass a message,so there is hope for two way contacts over diffic
Hi , I will tramsmit tonight 9/11/2001 and Sunday night 11/11/2001 (Saturday clear for Davids 136 attempt).Frequency 72.401.5kHz Hope this freq clear. My frequency now much more stable. Mode DFCW. 0.
