[ARC5] What Were They Monitoring?

[DSP3]

You all have surmised correctly.  The RIW (to include the RIS, RIU and 
RIV) were set up on the local LF/MF, (200-450 kHz, typically) Navaid and 
alarmed whenever the transmitter went down.  The FAA RHZ was used from 
1600 kHz to 10 MHz.  CONUS sites would generally have the alarm tied 
into a remote wireline to the nearest RAG, tower, or Airways Facility 
Branch to notify maintenance folks.   At my site, we had a National 
NC-100 receiver (FAA RCP with an installed COR sensing circuit) in the 
ops office for the HH beacon   Loss of signal on the HH sounded a 
horrendous bell to notify every living thing for probably 100 miles 
around the island.  I put some paper towel material inside the bell to 
make it more livable.  Truth told, however, I only recall it going down 
once.  The HH on Swan had dual transmitters, so no real issues.  I have 
the FAA books on all this stuff, BTW.

Jeep - K3HVG



On 1/19/2015 6:47 PM, Robert Eleazer wrote:
> Reference ebay item:  330913738401
>
> What were they monitoring for an alarm?  I assume since its CAA it was not the 500 KHZ ship emergency channel.
>
> Wayne
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