Gravsol-42

This Is Gravsol-42 On 4835 kHz

Parameter	Current observation
Engima ID	None
Name	Фазуна-09
Frequencies	7026 kHz
Status	Active
Voice	Male Only, Live
Emission Mode	USB
Location	Smolensk, Russia

Activity Page
[Gravsol-42's Log's]

[The Link To Play The Marker Sound]

Gravsol-42 is an unidentified shortwave radio station associated with a series of unusual transmissions heard by radio enthusiasts beginning in 2016. The station was initially reported on 4834 kHz before later appearing on 4835 kHz and, in subsequent years, across several frequencies between approximately 6440 kHz and 7026 kHz.

The transmissions are primarily associated with Russian-language voice messages, signal tests, and periods of silence. The exact purpose and operator of the station remain unknown.

History

Discovery

Gravsol-42 was first reported in 2016 by radio enthusiasts monitoring the lower shortwave bands. Early reports placed the station around 4834 kHz.

The signal initially attracted relatively little attention. Listeners described hearing short transmissions consisting of static, tones, and occasional Russian speech. Some transmissions appeared to be simple signal or communication tests.

As recordings began to circulate among radio-monitoring communities, more listeners started monitoring the frequency.

One of the phrases associated with the station was:

"ПРОВЕРКА ВЫЗОВА"

The phrase was sometimes followed by a sequence of numbers from one to ten.

4835 kHz

Following its early appearances on 4834 kHz, the station became associated with 4835 kHz.

The frequency became the primary frequency used by listeners when searching for the station. Transmissions were generally heard in USB mode.

A typical transmission could consist of a short Russian announcement followed by a numerical sequence:

ПРОВЕРКА ВЫЗОВА.
ОДИН. ДВА. ТРИ. ЧЕТЫРЕ. ПЯТЬ.
ШЕСТЬ. СЕМЬ. ВОСЕМЬ. ДЕВЯТЬ. ДЕСЯТЬ.

After the message, the transmission would often end abruptly, leaving the frequency silent.

Frequency changes

During the later period of its operation, Gravsol-42 began appearing on a number of different frequencies.

The station was no longer consistently associated with 4835 kHz, and listeners began reporting transmissions at frequencies in the 6–7 MHz range.

Reported frequencies included frequencies from approximately 6440 kHz to 7026 kHz.

The reason for the frequency changes has never been publicly established. Possible explanations suggested by listeners have included interference avoidance, transmitter testing, or changes to the station's operating schedule.

Frequency	Period	Notes
4834 kHz	2016	One of the earliest reported frequencies
4835 kHz	Early period	Main frequency associated with the station
6440 kHz	Later period	Part of the station's later frequency range
7026 kHz	Later period	One of the highest reported frequencies

Because many reports were made independently by radio enthusiasts, the exact chronology of every frequency change is uncertain.

Transmissions

Gravsol-42 does not appear to have operated as a conventional broadcast station. No regular music or news programming has been consistently associated with the station.

Instead, transmissions have generally consisted of:

• Russian voice messages
• Number sequences
• Signal tests
• Tones and noise
• Long periods of silence

The station's transmissions could occur without warning, making continuous monitoring difficult.

Call tests

One of the most recognizable elements associated with Gravsol-42 is the phrase "ПРОВЕРКА ВЫЗОВА".

The phrase is generally followed by a sequence of numbers:

Russian	English
ОДИН	One
ДВА	Two
ТРИ	Three
ЧЕТЫРЕ	Four
ПЯТЬ	Five
ШЕСТЬ	Six
СЕМЬ	Seven
ВОСЕМЬ	Eight
ДЕВЯТЬ	Nine
ДЕСЯТЬ	Ten

The meaning of these messages has not been established.

Monitoring

Radio enthusiasts have monitored Gravsol-42 using shortwave receivers, SDR receivers, and online receivers.

Reception reports have been made from various locations. Signal strength has varied considerably depending on propagation conditions, frequency, time of day, and receiving equipment.

Listeners have also attempted to determine the approximate location of the transmitter by comparing reception reports and using directional antennas.

Some reports have associated the signal with western Russia, although the exact transmitter location remains unconfirmed.

Name

The name Gravsol-42 is an unofficial designation used by radio enthusiasts.

There is no confirmed evidence that the station itself has publicly identified using this name.

The origin and meaning of the name are unknown.

Legacy

Gravsol-42 became notable among shortwave enthusiasts because of its unusual transmissions and frequent changes in operating frequency.

Its history began with reports around 4834 kHz in 2016 and later continued on 4835 kHz before expanding into the 6440–7026 kHz range.

Despite years of monitoring, the purpose, operator, and exact location of the station remain uncertain.

The station therefore remains an unusual entry in the history of shortwave monitoring.

See also

• Shortwave radio
• Numbers station
• Radio monitoring
• Signals intelligence

4835 -> 4834 (-1khz freq change) -> 6440 -> 6995 -> 7000.