24 Jan 2017

2m WSPR

G8OFA in Salisbury is trying 2m WSPR on 144.489MHz beaming towards Cambridge, so I have QSYed from 10m JT65 to 2m WSPR.

As I am dependent on the FT817's internal TCXO, drift may well be an issue. As you can see, drift is a real problem. In the end I set the FT817 100Hz low which seemed where I was centred on the WSPR segment.

On WSJT-X V1.7 you can see about 2.5kHz of the band in real time, so I just made the frequency adjustment to where most activity seemed to be. This could be wrong and I could drift off!

Just exchanged WSPR spots with G8OFA (189km).



1 comment:

Anonymous said...

HiRoger re FT817 stability you may be interested in these modules for sale on eBay. for about £10

Mini 22.625MHz 0.5PPM Accuracy Compensated Crystal Components FOR FT-817/857/897

http://www.ebay.co.uk/itm/Mini-22-625MHz-0-5PPM-Accuracy-Compensated-Crystal-Components-FOR-FT-817-857-897/201162712036?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D2%26asc%3D40812%26meid%3Dc47f687deef248e6a9770d5f83a7581e%26pid%3D100005%26rk%3D4%26rkt%3D6%26sd%3D262770783035

Regards Chris G8OCV