Many thanks to SRAA contributor, Gert Irmler, who shares the following recording and notes:

Broadcaster: R Chinchaycocha, Junín / PRU 4860 kHz

Date of recording: July 05, 1978

Starting time: 04:42 UTC

Frequency: 4.860 MHz

Reception location: Schwäbisch Gmünd, BW - Germany

Receiver and antenna: Grundig Satellit 2000, 30m longwire

Notes:

OBZ4Z R Chinchaycocha, Junín, Perú
QRG: 4860 kHz
QTH: Schwäbisch Gmünd / Southern Germany
Rec: 5th July 1978 / 04:42 - ca. 07:15 UTC (GMT) (!)
Rx, Ant: Grundig Satellit 2000 - 30m longwire
Px: S, anns, huaynos, ID
SINPO: 34322
Remark: July 5th, 1978 was a very special day - great LA reception with smooth fade-out far beyond sunrise. Picaflor's spellbinding folk song 'María Alejandrina' caused goosebumps (especially from 3:33 in the MP3). Text goes as:

"María Alejandrina, what a beautiful woman's name you have.
Your name is kindness. Your noble heart ...
I would like them to change my bad life for good.
She isn't Carmen Rosa, nor Ana María,
nor is she Margarita, It's María Alejandrina ..."

ID at 14:58 in sound file ('desde Chinchaycocha'), the station's transmitting power in 1978 was 0.5 kW ...