Propagation and Contesting:

- Kp Index

- ARRL Contests Portal
- WA7BNM Contest Calendar

- DX Summit

Organizations: 

- American Radio Relay League (ARRL)

- Radio Amateurs of Canada (RAC)

- Radio Society of Great Britain (RSGB)
- International Amateur Radio Union (IARU)

Equipment: 

- Balun Designs - superbly built, high quality baluns and common mode chokes

- Acom Amplifiers - outstanding HF power products and customer service

- DX Engineering - premium products and competitive prices

- K4KIO HexBeam - premium quality product - excellent customer support