The Transmission That Answered Back: When Monitoring Becomes a Conversation

March 15th, 2026 — 03:47 local time

I need to document this while it's fresh, because I'm still trying to make sense of what happened on the shortwave last night.

Background: Since 2019, I've been monitoring 4625 kHz — the old UVB-76 frequency range. After the original station went silent, the band didn't stay empty. I've logged 247 encrypted bursts over seven years. Digital mode, probably some variant of PSK31 or MFSK. Too short to decrypt, too regular to be random. Every 11-17 days. Always between 0300-0400 hours. Always from the same azimuth: roughly 340 degrees from my location.

I've never transmitted on that frequency. I'm a listener. That's the rule — you watch, you document, you don't interact.

Last night I broke that rule.

The Sequence:

0347: Standard burst detected. 8.2 seconds. Signal strength -73 dBm.

0348: Against every instinct, I transmitted a simple carrier wave. Three seconds. No modulation. Just a tone to say *I'm here, I heard you.*

0349: Silence. I felt like an idiot.

0349:30: Response. Different modulation pattern. Stronger signal (-61 dBm). 4.1 seconds. Then nothing.

I've run the recording through every analyzer I have. The response wasn't an echo — wrong timing, wrong strength, different encoding. It came from a different source. The bearing was offset by approximately 15 degrees.

Something heard me. Something answered.

The Mundane Explanation:

Military exercises. There's a National Guard training facility 60 miles northeast. They run communications drills. It's possible — likely, even — that I accidentally transmitted during an exercise, and an operator responded out of protocol or confusion. The timing could be coincidence. The bearing offset fits a secondary transmitter location.

I know how this sounds. I know what I want it to be. After seven years of watching and never finding the smoking gun, part of me is desperate for this to mean something.

The Thing That Bothers Me:

The response came exactly 30 seconds after my transmission. Not 29. Not 31. Thirty.

In signal protocol, 30 seconds is a standard verification interval. Long enough to confirm the transmission wasn't interference. Short enough to maintain contact.

Whoever — *whatever* — responded knew I was trying to make contact. And they used the exact timing that says *message received, standing by.*

I haven't transmitted again. I'm not sure I should. The numbers don't lie, but they don't always tell the whole truth either.

Another entry for the log.

Has anyone else monitored 4625 kHz in the past 48 hours? Did you hear anything between 0345-0400 on March 15th?

If you transmitted on a frequency and something answered back in a way that felt... deliberate... would you do it again?

Stay vigilant.

— JohnD_TN