Doubling is a phenomenon that exists on all 2-way radio. And it is becoming a problem on HamSphere.
Doubling is when two stations start talking at the same time due to bad Amateur Radio protocol.
This even happens on real Amateur Radio bands, Air Traffic controllers, NASA space flights etc so HamSphere is not unique.
The key is: Use proper Ham Radio protocol !!!
1. ALWAYS end your transmission with the callsign of whom you are leaving the microphone to followed by "this is" and "your own callsign" and then say "over".
2. If you are in a group QSO, just add "and the group" before "over".
3. Gaps? We have heard that someone is trying to introduce long delays between transmissions. This is WRONG. We designed the system for fast overs and this should be used. Infact leaving gaps makes Ham Radio communication even more difficult as it breaks the Amateur Radio protocol and creates uncertainty and confusion as well as it leaves the frequency open for abuse.
4. The listening stations. Always wait for the over, or the exhange of callsign information. DO NOT just push the PTT when you hear a gap in the transmission when you think it is your turn. Wait for at least an "over" or the exchange of callsign information. If you do not get the over, just ask "Was it my go? and your callsign" and release the PTT.
5. Breaking into a QSO? It's easy. At the end of anyones transmission, just key up, say your callsign very quickly and release PTT. Since the system has full QSK your callsign will be noticed and the proper protocol is for the next QSO holder to acknowledge your "break" and leave a gap in the next over. But it is important that you get acknowledged.
I hope that all operators start using the proper Ham Radio communication protocol. HamSphere is not a telephone system, it is a 2-way communication system. And there is always a small delay of 0.2-1.0 seconds due to Internet latency issues. DO NOT misuse that natural delay to abuse the system nor to gain access to an ongoing QSO.