21-11-2019, 12:21 PM
Hi Leigh, Hayden and Damien.
I wonder if it has something to do with beacons.
With regards to stability...
I bought an FT817 to use on HF WSPR as it is a low power using device. It works well. Then I tried it on 2m and found it was nearly 100hz out and rather drifty. I then bought a Chinese TCXO-9 and installed it. ( actually I bought two, just in case ! ) That made a big improvement; from a cold start it is approx. 40 hz high then as the rig warms up it drifts down and stabilises at about 4hz high.
I can live with that, given the price of the rig. Interestingly it is within 1hz on 40m...not bad.
On 2m I use the GPS locked Mt Anakie beacon as a reference. On HF I rely on reports from GPS locked stations.
73
Nev
Edit. At the moment it is right on freq. I use Spectran to check the audio freqency as I have been told it is quite accurate.
Nev
I wonder if it has something to do with beacons.
With regards to stability...
I bought an FT817 to use on HF WSPR as it is a low power using device. It works well. Then I tried it on 2m and found it was nearly 100hz out and rather drifty. I then bought a Chinese TCXO-9 and installed it. ( actually I bought two, just in case ! ) That made a big improvement; from a cold start it is approx. 40 hz high then as the rig warms up it drifts down and stabilises at about 4hz high.
I can live with that, given the price of the rig. Interestingly it is within 1hz on 40m...not bad.
On 2m I use the GPS locked Mt Anakie beacon as a reference. On HF I rely on reports from GPS locked stations.
73
Nev
Edit. At the moment it is right on freq. I use Spectran to check the audio freqency as I have been told it is quite accurate.
Nev