[TAC] to the waters edge

[Greg Surma]

Sounds good.

300' is a serious length of coax.  At 28 mhz you are approaching 3 dB of loss with RG8U; with the much lighter Dxpedition-friendly RG8X your loss is over 5 dB per 300' run.  Weight also becomes a factor:  RG8/U is 12 lbs/100'; 9913 is 18 lbs/100'; RG8X is 4 lbs/100'. Better coax on 28 Mhz will spell the difference between working the lone PY that wants our 10-10 number and being totally shut out.   

I wonder if the lumber yard on Miquelon carries RG6 that is typically used for satellite/cable TV install?  A good grade of RG6 will have losses somewhere between the losses for RG8 and RG8X.  If RG6 was available for cheap on the island (less than 10 cents per foot) we would be free of the excess weight of taking coax over.  A quarter wave of 50 ohm coax would transform down to the 35 ohms of a typical vertical.  

I've thought of balanced feedline (light as heck and low loss) but I'm not sure it's very practical.  We would have to provide matching and would have to keep it above ground for the 250' to the beach.  Hank and I both have Dentron SuperTuners to take care of matching; these are probably one of the lighter KW matchboxes made.     

 

-----Original Message-----
From: tac-bounces at mailman.qth.net [mailto:tac-bounces at mailman.qth.net] On Behalf Of Todd Fonstad
Sent: Thursday, August 04, 2005 8:34 PM
To: TAC at mailman.qth.net
Subject: [TAC] to the waters edge

Greg said:

It sounds like 300'-400' to the waters edge.  Much coax needed..??


Greg, You can take a look on that website that was posted earlier, but
offhand I'd say that IF it's a football field length to the water, it's
sure no more than that, at least at "high tide".

73, Jeff - N8CC


I have "Keyhole" which allows me to view the island in good resolution from 
satellite images. The distance from the very north tip of the motel to the 
waterline is 245 feet.  The distance from the center of the motel (main 
entrance) is 325 feet. The distance from the very south tip of the motel to 
the shoreline is 260 feet. Looks like Jeff has a good sense of distance!

The berm appears to be about 180 feet out from the motel on average.

If any of you would like me to e-mail any images of the island/community/or 
close-in view of motel (sorry, not close enough to read the "fermé pour la 
saison" sign at the door), let me know and I shall send 'em off. Of course, 
I cannot post them to this group over the reflector.

BTW, the "airstrip" appears to be about 3100 feet in length :)  And there is 
no forested ravine to stop an overshoot.......

73
Todd
N9NE
Still deliberating ........ 


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