Reading and commenting on a post about the new 10m W5OLF WSPR beacon AE5X John made and tested, something important has been pointed out. Regarding the use of 100% transmitting beacons on WSPR, you should read this comment first! There are not yet so many of these new WSPR beacons around but if this type of beacon really becomes populair whe face a bit of a problem. WSPR signals can be heard on a fixed part of the band in a bandwidth of 2500 Hz (200Hz audiobandwidth), as long as beacons only transmit a percentage of a 100% time span it's easy to fit more then 100 stations in this bandwidth. But if these WSPR kits become populair and you live near some (20-30) of these continuous beacons it will be hard to find a free frequency to transmit or receive a WSPR signal. Luckely my 30m W5OLF WSPR beacon does not have this problem as it the 2 minute transmissions are triggered by a timer. Another thing you have to think of when using these kind of transmitters is that a TX only beacon is a bit selfish. If everyone is using these kind of TX only beacons no one is spotted anymore. Because of this I will only use my beacon occasionally.