THE DAS (Delayed Alarm Signal)

The DAS (Delayed Alarm System)                        MADAR-III DataProbe
$24.00 (includes shipping)
3" length x 2-1/4 width x 3" height
9 volt battery NOT included

20190329, updated 20210127

Anyone who has the MADAR-III-B DataProbe (right) can utilize the green contacts of the ratchet relay switch on top of it to activate a DAS Alarm (left). Operators automatically get an alert email and an alert text message on their cell phones, but with the DAS, operators will be shaken out of bed and have them running for a camera, pair of binoculars, or their night vision goggles (hopefully equipped with a recorder).  If the Op or his team has FlightRadar24 and/or a set of Reolink skycams, using the free OBS system he can hit the record button before going outside.

As soon as you get your DAS, take out the back screws and remove the back panel so you can install your 9 volt battery. Then replace the back panel. Two screws should be enough.

UNPLUG your MADAR from the a.c. outlet. This is to keep from triggering the device while you install the DAS.

THE DAS comes with a set of wires, 24" long.  You can run longer wires if you wish and it is suggested that 16/2 solid wire (thermostat wire is good) should be used because of the touchy relay contacts. In any case, put the DAS where you will hear it at any time you're home. You'll need a small jeweler's screwdriver, the phillips type. Run your wires from the MADAR relay contacts (green, and on top of the MADAR) over to the DAS. Make sure the screws holding the wires are tight enough so they don't pull out. Once wired, turn the toggle switch on the DAS to "on", which is the "arm" switch.

Re-plug the MADAR into the a.c. outlet.
You're now ready for an alert. When you get the alert signal, turn off the DAS until the alert is over, then re-arm the DAS. The alert is over when the blue LED on the MADAR goes out. (Usually 3-4 minutes).

In my case the office with the MADAR and DAS is below the bedroom and it is hard to hear the alarm buzzer. So I purchased an intercom on Amazon that can be used like a baby monitor and works up to over a mile!!!!! You can get a set for under $50 and the receiver can be placed anywhere you want it. It could even be placed in another building if needed!

The original MADAR had both a PAS (Proximity Alarm Signal) AND a DAS (Delayed Alarm Signal), all mounted on a large Mode Control Panel. When an anomaly was in-progress, a buzzer pulsed, acting as a proximity alarm with the movements of the magnet variometer being heard and recorded. This told us the alert was in progress, the number of times the compass moved from north, and the duration of the event. In conjunction with this proximity audio alarm there was a visual component with a red LED also pulsing. The DAS, on the other hand, was a siren that wailed upon alert that ran until shut off by the operator. While this was occurring, the steady green LED was automatically activated. The DAS had a switch on it so that the siren could be turned off during an alert. The Mode Control Panel also turned on recorders and turned off a shutter-type mechanical clock. MADAR-II (2014) had much more and used a WWV short radio signal to time-date the data, which included background radiation. But MADAR-III is a breakthrough in simplicity and scientific data recording.

When MADAR goes into AlertStart, the blue LED on the DataProbe comes on when the relay switch on the MADAR closes. While the DAS has alerted you or your team, you can turn the DAS off and take your positions outlined by your planned alert procedures. After the anomaly is over and the device goes into AlertEnd, the program puts the device into "alertStat" (normal background numbers but at the once per second rate) for an additional three minutes before the ratchet relay switch opens and the alert is officially over and the scan rate returns to once per minute. At that point the DAS can be "re-armed" and ready for the next alert.

Purchase your DAS ($24) at the link & click purchase:

The DAS runs on a 9 volt-dc battery BUT, you can get one of these adaptors and never worry about the DAS being out of "juice". If we bought them and had to ship them to you we would break even at $20. But you can order them on Amazon and they will direct ship to you and save you money.

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Anyone interested in direct participation in the MADAR Project or Project MATCH is certainly welcome. Please contact me. Anyone wanting to support the cause with funds only can go to the site and donate any amount.

Fran Ridge
MADAR Operations Director
* Thermostat wire is solid and inexpensive and feeds into the relay contacts easier than braided wire. The length can vary depending on the need and can be as long as a hundred feet.