[TowerTalk] C-3SS and 40m Add-On?

[n4kg@juno.com]

N4KG answers inserted in text below.

On Fri, 11 Jan 2002  Eric Rosenberg <wd3q@erols.com> writes:
> 
> I've been toying with the idea of replacing my F12 C3-SS with a C-4 
> or  similar antenna.

	BAD  IDEA.  
> 
> Recently, I've seen a 40m add-on element for a C3 offered for sale, 
> and  after making some inquiries, found out from F12 that instead of 
> mounting  it to the C3-SS, I could likely use this element as a
rotatable 
> dipole  over my C3-SS.

	GOOD  IDEA.    
> 
> The questions:
> - is this a decent solution?  Saves me $$ over having to sell the 
> C3-SS  and buy a C-4S or so.
> 
	YES.  The CC D40 is another good option.

	Double wall the first piece of tubing for additional
	stiffness / increased wind survival.  Personally,
	I prefer the CC coil loaded element over a short 
	linear loaded element.  I've had NO problems
	with my CC 2L40.   N4KG

> - how high would this element have to go above the C3-SS. The one 
> answer I received so far was "a few feet above the boom of  the C3SS > 
> and parallel to the boom."  What's the definition of "a few feet 
above"
> 
	GOOD  ANSWER.  Few = 3 or more.  
	The boom on a C3SS is 12 ft.  Way shorter
	than 1/2 WL on 40M so it won't bother the 40M dipole.
	At right angles, the 40M dipole won't bother the beam.

	Alternatively, you could place the 40M element
	above and parallel to the Yagi elements.  10 to 14 ft
	spacing usually works well.	N4KG

> - how far from this combo would an 80m wire have to be?

	As far as possible.  You may or may not have 
	interaction effects.  As long as the SWR is not
	overly affected, the higher band antennas will
	still radiate effectively.  You may suffer some
	F/B or F/S reduction.    N4KG

	For our FD stations, we insert a 20 ft  1-1/4 inch mast
	inside the 1.5 or 2 inch od masts for our 20 and 15M
	Quads, placing an 80M inverted vee at 70 ft and the
	Quads at 50 ft.  Seems to work quite well.  N4KG
> 
> Thanks in advance,
> 
> Eric W3DQ
> Washington, DC
> 

________________________________________________________________
GET INTERNET ACCESS FROM JUNO!
Juno offers FREE or PREMIUM Internet access for less!
Join Juno today!  For your FREE software, visit:
http://dl.www.juno.com/get/web/.

________________________________________________________________________
This list is sponsored by the new eHam.net Store.  When you buy products
like ICE filters, Array Solutions StackMatch, or M-Squared Antennas from
the eHam Store for the same price you pay direct, a portion of the sale
price goes to support this list.  Check it out at http://www.eham.net.

-----
FAQ on WWW:               http://www.contesting.com/FAQ/towertalk
Submissions:              towertalk@contesting.com
Administrative requests:  towertalk-REQUEST@contesting.com
Problems:                 owner-towertalk@contesting.com