There is no charge to use the WA0TDA remote base HF station. The mission of the station is to promote on the air activity, especially for those operators who cannot get up HF antennas because of restrictions, condo living, cost, and so on. It is also to keep those operators who might be traveling connected via a radio station that they can use from anywhere as long as there is an internet connection.
You must be approved by the station admin to transmit. Transmit privileges are only granted to holders of USA General Class or higher licenses. Please read the getting started and about pages for more details.