[TowerTalk] 160-m. Inverted L Question

wa3afs at inav.net wa3afs at inav.net
Wed Dec 12 20:11:28 EST 2007

I use coaxial inverted Ls.  Direct feed and no tuner needed if feeding a single coaxial inverted L.  (I phase 
multiple inverted Ls and that does require a tuner).

The coaxial inverted L does require radials.  (The more the merrier, but the antennas start to play nicely 
with 3 or 4 radials).  Presently, I have 60 radials under each antenna.

My coaxial inverted Ls (160M, 80M) are looped over trees.  The 40M and 20M coaxial inverted Ls are 
basically totally vertical.

These antennas work GREAT for DX; lousy for 'local' stuff!

SWR is less than 2:1 across the entire band depending where you design the center point.  Built using 

Coaxial inverted L is actually 1/2 of a bazooka antenna.

Will be applying for 160M endorsement to my 5 band DXCC in January!

   -- Bruce, WA3AFS

On 12 Dec 2007 at 19:18, RLVZ at aol.com wrote:

> Hi Guys,
> I've been doing research on 160-meter Inverted L's and would
> appreciate  your thoughts on the following:
> 1) Some people report that the 160-m. Inverted L can be fed directly
> with  50 ohm coax with good results.  Is that true?
> 2) Some people feed their Inverted L's with fixed 500 or 1,000 pF 
> capacitors.  What advantages does this offer, such as: lower SWR at 
> resonance, and/or increased bandwidth?  (again these are "fixed"
> capacitors  not variable)
> 3) Can you offer a good resource for the 500 or 1,000pF  capacitors
> that will handle a Kw?
> I realize a variable capacitor is best as you can move around the band
>  better... but for this temporary 160-m. Inverted L... I'd prefer
> Options 1 or 2  above.
> Best 73,
> Dick- K9OM  
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