[Antennas] Optimal longwire for QRP

Sun, 12 May 2002 21:13:23 +0100 (BST)

Guys,

For thoses of us outside the US are "shock cords" a comercial item ? I
imagine these to be the elasticated items that you use to hold thinngs
to a car roof rack.... but I may be way off here.

US and Britsh English are often quite different !

Thanks in advance
Steve
M0BPQ
(PS I use the pully and counter-weight method here)

-------------------------------------------------------------------
Steve Bunting
Neural Damage and Repair,		Tel 0207 848 6268
Neuroscience Research Centre,		
King's College London
Hodgkin Building			[email protected]
Guys Campus
London Bridge
London
SE1 1UL
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On Sun, 12 May 2002, Charles Greene wrote:

> At 10:36 AM 5/12/2002 -0500, George, W5YR wrote:
> >I also use parallel shock cords on all my tree-mounted antennas and so far
> >they have lasted for several years with no problems.
> >
> >I strongly recommend that you use either several cords in parallel or use a
> >slack "safety" rope in parallel with the cord(s) just in case they should
> >break or whatever. So, far, I have used only two (belt and suspenders!)
> >cords at each end of my major tree mounted antenna and both are still in
> >like-new condition after several years of service and weather exposure.
> >
> >Charles and I have must think alike in several ways - I also use standard
> >THHN #14 stranded "house" wire for all my antennas with excellent service
> >and reliability. Can't beat the cost at $15 for 500 ft at Home Depot.
> 
> 
> I ended up with 6 shock cords in parallel.  I started with one and kept 
> adding until it seemed right.  I use #14 stranded insulated for the wire 
> antenna like George did, but got some #14 insulated stranded super flexible 
> antenna wire, and it is on the G5RV which is about 4' too long for the 
> space, so it goes around a boat pulley and down the mast.  Probably affects 
> the pattern about 0.2 DB.  The tree is on the opposite end, also with six 
> shock cords in parallel and no weight.
> 
> 73, Chas, W1CG
> 
> - - - 
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