Pip study page

Frequency	5448 kHz (daytime), 3756 kHz (nighttime)
Callsign	Unknown
ENIGMA	S30 (formerly XT, redesignated in early 1999)
Emission mode	AM with suppressed carrier
Schedule	see below
Operation country	Russia
Traffic	Beeping signal, ~63 times per minute, different on both frequencies (sound sample, sound sample). Voice messages, various formats.
Purpose	Unknown
Location	Outside St. Petersburg (not Rostov/Don).
Malfunctions	Missing beeps, sometimes long gaps between frequency switching (transmitter maintenance?), distorted beeping, regular 1 kHz frequency shift (3756/3757).

Schedules

Pip is broadcasting on two different frequencies. Time of its switching is different in different seasons of the year. Schedule marked as bold is current.

Time	5448 kHz	3756 kHz
Spring	3:30-15:00	15:00-3:30
Summer	2:00-15:30	15:30-2:00
Autumn	4:30-15:00	15:00-4:30
Winter	5:30-14:00	14:00-5:30

Schedules are starting always on 1st Sunday, spring schedule starts in March, summer – May, autumn – September, winter – December.

Voice messages

Only numbers format (Dlya ... Kak slyshno? Priyom)

Date	Hour (UTC)	Contents
earlier messages are not very well known
December 27, 1998	03:30	854 032 471 331 629 008
January 13, 1999	07:38	014 071 206 500 634 850
July 25, 1999	22:16	796 610 604 461 661 206
July 22, 2003	22:02	–
March 12, 2005	15:01	877 374 967 400 640 261 689 039 955 069
then few messages were reported in December 2006, contents unknown
March 3, 2007	15:20	080 037 918 380 013 692 885 334 894 140

Many letters and numbers (as above)

Date	Hour (UTC)	Contents
November 22, 2009	00:30	HCLF61 HZhZBIL NZhFHV' Z'NLCYe 8'4OOZ ShchN2O7Shch 'PHT5
December 2, 2010	20:10	1YaR 089 ?R5 BSMYR 5 ?? 4 0 5
December 28, 2010	–	–
December 29, 2010	–	JYJ8 JC6 [...] J???
January 8, 2011	23:31	J?KO TPRM 81JYe LBM5 J5L5 D?J8 ShchMJB HBDM T?5M Ye??
February 8, 2011	05:34	SB7Z [...]

Format like UVB-76 and RDL (callsign 8S1Shch)

Date	Hour (UTC)	Contents
October 4, 2010	18:59	70 058 OTYaGChENIYe 84 86 46 21
October 4, 2010	19:23	56 510 IDRINEC 39 29 37 36
February 1, 2011	16:05	70 846 VYeRIN 81 78 16 54

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