On the back of A WSPR experiment for station evaluation I thought I would try a similar experiment on 30m in the quest for some meaningful results.
Given the lack of activity from credible stations on 40m, it seemed worth a checkout on 30m befor committing to the trial run, large download and data analysis.
So, I ran WSPR for a half hour just before 0000Z and observed the activity on WSPRnet map. I should note that my tx power was 0.1W and rx performance was impaired as there was a 20dB attenuator in line to achieve the tx power.
Above, the map after of the half hour of activity.
The encouraging this was that there were 12 stations active.
But… after 30min of operation, mine was the only station with spots outside of VK/ZL… my station using a low G5RV on the worst band for a G5RV.
It is really tedious to find out what power other stations are running, and as explained in the reference article, there is a need for stations running similar power, and there were stations running 5W… but no spots outside VK/ZL.
The spot records for VK2OMD follow (the format is a bit messed up, WSPRnet obviously did not envisage that the date might be copied).
Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km az 2017-08-04 23:10 VK2OMD 10.140131 -19 0 QF55fm 0.1 K5XL EM12kp 13872 71 2017-08-04 23:18 VK2OMD 10.140160 -26 0 QF55fm 0.1 VE3OWV FN15vk 15918 58 2017-08-04 23:18 VK2OMD 10.140132 -27 -1 QF55fm 0.1 K4COD EM73sc 15002 75 2017-08-04 23:10 VK2OMD 10.140237 -26 0 QF55fm 0.1 KY5M EM12kl 13865 72 2017-08-04 23:10 VK2OMD 10.140137 -11 0 QF55fm 0.1 ZL2CMC RF72of 2246 107 2017-08-04 23:10 VK2OMD 10.140141 -22 0 QF55fm 0.1 KC4SIT EM85 15201 73 2017-08-04 23:10 VK2OMD 10.140134 -16 0 QF55fm 0.1 ZL3AB RE66im 2159 124 2017-08-04 23:12 VK2OMD 10.140158 -28 0 QF55fm 0.1 W3ATE/8 EM98wf 15522 69 2017-08-04 23:12 VK2OMD 10.140141 -22 0 QF55fm 0.1 KC4SIT EM85 15201 73 2017-08-04 23:12 VK2OMD 10.140134 -15 0 QF55fm 0.1 ZL3AB RE66im 2159 124 2017-08-04 23:12 VK2OMD 10.140137 -11 0 QF55fm 0.1 ZL2CMC RF72of 2246 107 2017-08-04 23:12 VK2OMD 10.140237 -27 0 QF55fm 0.1 KY5M EM12kl 13865 72 2017-08-04 23:12 VK2OMD 10.140131 -20 0 QF55fm 0.1 K5XL EM12kp 13872 71 2017-08-04 23:12 VK2OMD 10.140132 -26 0 QF55fm 0.1 K4COD EM73sc 15002 75 2017-08-04 23:18 VK2OMD 10.140141 -24 0 QF55fm 0.1 KC4SIT EM85 15201 73 2017-08-04 23:18 VK2OMD 10.140135 -19 -1 QF55fm 0.1 ZL3AB RE66im 2159 124 2017-08-04 23:18 VK2OMD 10.140132 -20 0 QF55fm 0.1 K5XL EM12kp 13872 71 2017-08-04 23:20 VK2OMD 10.140134 -19 0 QF55fm 0.1 ZL3AB RE66im 2159 124 2017-08-04 23:18 VK2OMD 10.140137 -7 -1 QF55fm 0.1 ZL2CMC RF72of 2246 107 2017-08-04 23:24 VK2OMD 10.140237 -28 0 QF55fm 0.1 KY5M EM12kl 13865 72 2017-08-04 23:24 VK2OMD 10.140114 -25 0 QF55fm 0.1 AC0G EM38ww 14524 65 2017-08-04 23:24 VK2OMD 10.140132 -21 0 QF55fm 0.1 K5XL EM12kp 13872 71 2017-08-04 23:24 VK2OMD 10.140134 -14 -1 QF55fm 0.1 ZL3AB RE66im 2159 124 2017-08-04 23:30 VK2OMD 10.140137 -7 0 QF55fm 0.1 ZL2CMC RF72of 2246 107 2017-08-04 23:24 VK2OMD 10.140142 -21 0 QF55fm 0.1 KC4SIT EM85 15201 73 2017-08-04 23:24 VK2OMD 10.140137 -12 -1 QF55fm 0.1 ZL2CMC RF72of 2246 107 2017-08-04 23:30 VK2OMD 10.140142 -22 -1 QF55fm 0.1 KC4SIT EM85 15201 73 2017-08-04 23:24 VK2OMD 10.140242 -5 0 QF55fm 0.1 VK8VWA PH57kp 3156 316 2017-08-04 23:20 VK2OMD 10.140241 -9 0 QF55fm 0.1 VK8VWA PH57kp 3156 316 2017-08-04 23:18 VK2OMD 10.140241 -10 -1 QF55fm 0.1 VK8VWA PH57kp 3156 316 2017-08-04 23:10 VK2OMD 10.140241 -9 0 QF55fm 0.1 VK8VWA PH57kp 3156 316 2017-08-04 23:12 VK2OMD 10.140241 -9 0 QF55fm 0.1 VK8VWA PH57kp 3156 316 2017-08-04 23:44 VK2OMD 10.140245 -19 -1 QF55fm 0.1 VK8VWA PH57kp 3156 316 2017-08-04 23:44 VK2OMD 10.140138 -16 0 QF55fm 0.1 ZL2CMC RF72of 2246 107 2017-08-04 23:44 VK2OMD 10.140142 -23 -1 QF55fm 0.1 KC4SIT EM85 15201 73 2017-08-04 23:44 VK2OMD 10.140134 -26 0 QF55fm 0.1 ZL3AB RE66im 2159 124 2017-08-04 23:44 VK2OMD 10.140169 -16 0 QF55fm 0.1 CADES1 QE37pa 984 195 2017-08-04 23:48 VK2OMD 10.140142 -25 0 QF55fm 0.1 KC4SIT EM85 15201 73 2017-08-04 23:48 VK2OMD 10.140138 -7 -2 QF55fm 0.1 ZL2CMC RF72of 2246 107 2017-08-04 23:48 VK2OMD 10.140169 -26 0 QF55fm 0.1 CADES1 QE37pa 984 195 2017-08-04 23:48 VK2OMD 10.140175 -21 0 QF55fm 0.1 VK4TDI QG62lm 814 18 2017-08-04 23:52 VK2OMD 10.140134 -25 -1 QF55fm 0.1 ZL3AB RE66im 2159 124 2017-08-04 23:48 VK2OMD 10.140134 -24 -1 QF55fm 0.1 ZL3AB RE66im 2159 124 2017-08-04 23:48 VK2OMD 10.140246 -9 0 QF55fm 0.1 VK8VWA PH57kp 3156 316 2017-08-04 23:52 VK2OMD 10.140246 -10 0 QF55fm 0.1 VK8VWA PH57kp 3156 316 2017-08-04 23:52 VK2OMD 10.140169 -19 -1 QF55fm 0.1 CADES1 QE37pa 984 195 2017-08-04 23:30 VK2OMD 10.140132 -28 -1 QF55fm 0.1 K4VZZ EM86 15229 71 2017-08-04 23:30 VK2OMD 10.140135 -27 -1 QF55fm 0.1 ZL3AB RE66im 2159 124
There are wide variations in reported frequency but the tx did not change frequency. There are simultaneous observations showing frequencies more than 35 Hz apart… that is not doppler!
This checkout indicates the probability of success of repeating the 40m experiment on 30m is very low and not worth the effort.