As per email from Brazilian DX-er Ulysses Galetti, CVC Sua Voz will air a feature on my reception of Radio Eldorado, Sao Paulo, 700 kHz, on the following dates:
Aug 3 at 1530 UTC on 15410 kHz
Aug 4 at 1100 UTC on 15410 kHz
Aug 5 at 0200 UTC on 11745 kHz
Aug 6 at 0000 UTC on 11745 kHz
Or, if you are unable to hear these frequencies, you can download a four-minute MP3 here.
The presentation is in Portuguese.