|Sample FT4 screen (from WSJT-X website)|
Release candidate 7 was issued after a "serious bug" was discovered in version 6, according to the ARRL. The newest version features several enhancements over previous release candidates. A mock contest was held on June 4 and 5 to test the new software under "real-world" conditions. Co-developer Joe Taylor, K1JT, reported on QRZNow.com that he operated for approximately three hours, making 143 contacts in 29 states, 5 Canadian provinces and 15 DX locations.
FT4 will not be available for use during the ARRL June VHF Contest or ARRL Field Day. It is unclear whether it will be available during the CQ World Wide VHF Contest on July 20-21, as Taylor says he anticipates a "general release" version of the software by "mid-July." For more about FT4, see June CQ's "Contesting" column and the July issue's "VHF-Plus" column.
In a related item, the ARRL reports that the latest TQSL update for its Logbook of the World (LoTW) program includes FT4 as a submode of MFSK. In addition, the 11.8 update includes two new satellites, AISAT-1 and PO-101.