[ARC5] FCC General exam

D C _Mac_ Macdonald k2gkk at hotmail.com
Tue Nov 26 18:31:39 EST 2013


The beast used a monter "coax" line that was copper "pipe" about 6' I.D. 
The pictures showed a man walking INSIDE the coax before the center conductor of copper piping about 1 foot O.D. was installed using four insulated standoffs at each point at intervals along the feedline. 
The transmitter fed one of two identical antennas that had a huge ground counterpoise "screen" leading into the ocean. 
If one antenna iced up they fed raw AC (I guess) to the other antenna to de-ice it and then switched antennas. 
If I recall, the signal transmitted was ICW at about 5 wpm. Any higher speed would cause the bandwidth of the signal to exceed the bandwidth of the antenna system! 

* * * * * * * * * * * 
* 73 - Mac, K2GKK/5 * 
* (Since 30 Nov 53) * 
* Oklahoma City, OK * 
* USAF, Ret (61-81) * 
* * * * * * * * * * * 
 
 
> Date: Tue, 26 Nov 2013 23:07:11 +0000
> From: mstangelo at comcast.net
> To: k2gkk at hotmail.com
> CC: arc5 at mailman.qth.net
> Subject: Re: [ARC5] FCC General exam
> 
> It is 1 MW. I fould this list of VLF stations:
> 
> <http://www.smeter.net/stations/vlf-stations.php>
> 
> Mike N2MS
> 
> ----- Original Message -----
> From: D C _Mac_ Macdonald <k2gkk at hotmail.com>
> To: wa5jci at flash.net, mstangelo at comcast.net
> Cc: ARC-5 Mail List <arc5 at mailman.qth.net>
> Sent: Tue, 26 Nov 2013 22:39:18 -0000 (UTC)
> Subject: RE: [ARC5] FCC General exam
> 
> What was the power output at that Cutler, ME LF station?  100 KW?  1 MW?  I don't remember. I saw a presentation of the building of that station at a Dallas, TX hamfest around 63 or 64. 
>  
> * * * * * * * * * * * 
> * 73 - Mac, K2GKK/5 * 
> * * * * * * * * * * * 
>  
>  
> > Date: Tue, 26 Nov 2013 15:28:25 -0600
> > To: mstangelo at comcast.net; k2gkk at hotmail.com
> > From: wa5jci at flash.net
> > CC: arc5 at mailman.qth.net
> > Subject: Re: [ARC5] FCC General exam
> > 
> > Then there was the Omega system used mainly for civilian aircraft and 
> > ship navigation. We also used it for tracking our high altitude 
> > research balloons.
> > 
> > de Pete  WA5JCI
> > 
> > 
> > 
> > >The Navy still uses VLF transmitters to communicate with submarines. 
> > >Using a loop antenna to eliminate local QRN I can pick up the 
> > >Laulualei Hawaii station on 21.4 khz or the Jim Creek, Washington 
> > >station on 24.8khz day or night.
> > >
> > >The Cutler, Maine station at 24khz is easy to pick up since it is 
> > >close to my QTH in New Jersey.
> > >
> > >Mike N2MS

 		 	   		  


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