500 kHz.

Freq.  MHz	DATE D / M / Y	TIME UTC	Mode	TYPE of SIGNAL	Callsign	Location / Name	MAP	SOUND
0,507,00	23.10.2013	21.05	AM	Morse	ND	Airport Krasnodar Krai, settlement. Bolshevik,Russia
0,514,00	25.09.2013	19.15	AM	Morse	UR	Chkalovsky airfield, Moscow region, Russia
0,514,00	25.09.2013	19.15	AM	Morse	OF	Chkalovsky airfield, Moscow region, Russia
0,520,00	22.10.2013	17.00	AM	Morse	OG	Unid, Russia
0,520,00	13.10.2018	19.50	AM	Morse	OO	Aerodrome Shaykovka, Kaluga region, Russia
0,522,00	22.03.2021	16.10	AM	Morse	GR	Unid, Russia
0,525,00	29.02.2012	11.50	AM	Morse	PL	Airport Pulkovo, Leningrad region, Russia
0,527,00	01.11.2019	03.05	AM	Morse	TE	Airfield Terbuny, Lipetsk region., Russia
0,535,00	10.12.2014	11.50	AM	Morse	SP	Airport Malinovka,Tomskaya oblast, Russia
0,545,00	02.11.2019	14.00	AM	Morse	L	Chkalovsky airfield, Moscow region, Russia
0,565,00	07.01.2015	08.30	AM	Morse	KS	Aerodrome "Opaliha",Moscow Region, Russia
0,570,00	02.11.2019	11.05	AM	Morse	FE	Aerodrome "Oktyabrsky",Ryazan Oblast,Russia
0,581,00	04.11.2017	29.50	AM	Morse	DM	Zhukovsky Int. Airport, Moscow Region, Russia
0,591,00	25.10.2017	02.55	AM	Morse	RN	Airport Penza, Russia
0,596,00	22.10.2013	13.10	AM	Morse	KD	Airport Pushkin, Leningrad region, Russia
0,597,00	07.12.2014	11.35	AM	Morse	KK	Novosibirsk airport Tolmachevo, Russia
0,597,00	08.08.2021	07.35	AM	Morse	R	Novosibirsk airport Tolmachevo, Russia