Hi guys,
As the kit instructions say getting the output frequency in band can be a bit of a challenge. When I did the testing I used a frequency meter which can read down to one hertz which I calibrated against a 10 MHz Rubidium standard. When I get a round tuit I'll modify the counter so it is clocked by the standard so I can be really sure the frequency the meter reads is accurate at all frequencies. .?
I used the standard to check the calibration of my K2, FT817 and TS570 and was surprised to find the receivers were all reading 10.000,00 at zero beat. ?None of them have displays that will show the 0-9 Hz digit. So you really need to resort to using ARGO, or a similar piece of software, to get that information. You need to set it up correctly and make sure your RX is well calibrated.?
When the round tuit arrives I might try to more accurately determine the values of the capacitors Tony says needed to be changed to get into the WSPR band. But IIRR I could easily achieve this with the standard caps when I built the prototype. It's also worth pointing out that later kits in the first batch and all of the kits in the second batch will have a variable capacitor with a wider swing than the one we used to ship. This is because the people we buy from no longer stock it.?
73s Steve G0XAR
