The loudspeaker output from WRplus-1.04 sounds like this:
sim1-wrplus.mp3 (558600 bytes.)
The on-off keyed signal is at a level that is similar
to the noise floor level in the beginning and end of the
file where the data comes from an old Perseus recording.
There close range spurs that do quite not match the performance of modern hardware. The tested WRplus version was obtained by installing WRplus_1.04 which was downloaded January 7 2011.
The wide range spurs that were present in the previous release are not present here, but the close range spurs are still the same. Results are much better than the test
results for the previous version, WRplus_1.03
because the close range spurs often fall in a frequency range where modulation and sideband noise of the strong signal would dominate.
The details of the loudspeaker output are shown in figures
2 and 3 which are waterfall graphs produced by Linrad with
sim1-wrplus.mp3 as the input (before conversion to mp3).