Interesting links to the web pages of hams issues:
DXpeditions
www.iaru.org
www.pzk.org.pl
Pomorski Oddział Terenowy PZK nr 9
SP3KEY Club
SP2YWL Club
On-Line Ham Atlas
Radio Polska
Ham Radio Exhibition in Friedrichshafen DL
FunkAmateur
DARC
SP3PL Webpage and his Multibander 7-PL Antenna
HF Liner Amplifiers by SP5GJN
Extended SSB by SP6DLO
NU9N AM & ESSB Hi-Fi Audio
Electron Tube Data Sheets
Space Research and Science:
European Space Agency
Federal Space Agency
National Areonautics and Space Administration
Centrum Badan Kosmicznych przy Polskiej Akademii Nauk
Space News
Tools and calculators not only for hams:
On-Line Scientific Calculator
Pure ERP And EIRP Calculator
Approximate Air Coil Inductance Calculator
The Electronics Calculator Website
Antennas:
Understanding the Hexbeam
Sat by Mike DK3WN
Sat by PH7AT
OH8X has the biggest towers and antennas system in the Europe and probably in the World.
QRP & HomeBrew:
SQ1GU
Vintage Rigs:
One of the best or the best web servive of the HeathKit Products
Kenwood Hybrid Transceiver by Ken K4EAA
Polish TeleMuzeum