The Pip

Enigma ID S30

Spectrum image Pip _sample

Name The Pip, Капля, 8C1Щ
Frequencies 3756 simulcast 3771 (nighttime), 5448 simulcast 6913, 6922 or 7056 (daytime)
Status Active
Voice Male and female, live
Emission mode USB + carrier
Location Rostov-on-Don, Russia; 47°17'58"N 39°40'25"E (72nd Communication Hub, callsign: Акация)
Activity pages

Download audio sample

Known counterpart stations The Squeaky Wheel

"The Pip", known among Russian listeners as "Капля" (tr. Kaplya, English: Drop), is a Russian military commandment network serving the Southern Military District, located at the 72nd Communication Hub, Rostov-on-Don. It broadcasts on 5448 kHz during daytime, changing to 3756 kHz for nighttime.

Aside from its signature channel marker, it broadcasts mainly the following types of messages:

  • Routine propagation checks, always addressed to ten recipients at a time, identified by four character callsigns. Example: Для 4РВЗ, 3ВСЬ, ДКЙ1, ЖД9В, 42БВ, 81БР, М7КС, ПМВ5, ЛЬГЙ, КЗИЬ: Как слышно, как слышно? Приём (English: For [...]: How do you hear me, how do you hear me? Over).
  • "Monolith" type messages, followed by Moscow time, addressed either to the circular callsign 8С1Щ (tr. 8S1Shch), or, less commonly, to selected individual units.

The Pip multicasts traffic, without the channel marker, on either 6913, 6922, or 7056 kHz during the daytime and on 3771 kHz during the nighttime, though not always. Some of these frequencies also carry exclusive traffic. On 7056 kHz, the callsign of The Pip's hub was revealed to be "Диск-05" (tr. Disk-05). 6922 kHz sometimes leaks conversations from within the radio room via an open microphone, as per the below example.


The frequency switch-over times depend on the month. All times given are Moscow time (MSK, UTC+3).

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
3756 → 5448 08:30 07:30 ? 07:30 08:30
5448 → 3756 17:00 19:00 ? 19:00 17:00

Pip/Squeaky Wheel connection

We have known Pip and Squeaky Wheel to be associated with each other for several years now owing to several factors. When a "monolith" is transmitted by Pip with the callsign 8S1Shch (8С1Щ) there is always a following "monolith" message transmitted by Squeaky Wheel with the callsign Al'fa-45 (Альфа-45) between 2 and 10 minutes afterwards, albeit with different message content.

There have been instances of transmission from Squeaky Wheel with clearly audible Pip channel marker in the background having been picked up by the operator's microphone such as the below example. This demonstrates a direct connection in that the Squeaky Wheel operator is clearly monitoring the Pip. As can be deduced from the complete lack of follow-on message from Pip after a Squeaky Wheel transmission and also having never observed Squeaky Wheel channel marker bleeding into Pip transmissions, it seems that Pip does not need to monitor Squeaky Wheel.

Finally, as a "smoking gun", we have observed transmissions from both stations directed to the same unit(s) - callsign PMV5 (ПМВ5) is a good example of this as it is regularly asked to confirm reception with Pip in standard "dlya" messages and in April 2017 received a monolith transmission alongside two other callsigns transmitted from Squeaky Wheel.


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