Sorry, no position known for DO1YFF
No position report for DO1YFF has been heard in the last 10 days. There may be a problem
with the spelling of the callsign, the station may not be on the air, or in an area without radio coverage.
If you are not the owner of the station, you should contact the station operator for help.
You might also try a lookup of DO1YFF on qrz.com, which gives license information for all US and many foreign radio amateurs.