Topband: Vertical vs inverted L question/opinions

[Joe Giacobello, K2XX]

G3JEJ uses an inverted L, although I forget its dimensions.  He has one 
of the most consistent signals from across the pond at my QTH.  FWIW.

73, Joe
K2XX

> Dave G4GED <mailto:radiodave.g4ged at tiscali.co.uk>
> Tuesday, August 13, 2013 3:04 AM
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> It's popular because relatively few operators have the space or 
> facility for two tall strong end supports.
> The L has always worked very well indeed for me and my DXCC score says 
> so :-)
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> Topband Reflector
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> Herb Schoenbohm <mailto:herbs at vitelcom.net>
> Sunday, August 11, 2013 6:15 PM
>
> Why is an inverted "L" apparently so popular on 160 when it wastes so 
> much RF as a cloud warmer?  It is so easy converting an inverted "L" 
> into a Marconi T.  The flat top can be 130 feet fed exactly in the 
> center  by a single drop wire to the ground with the appropriate 
> network.  A 65 foot drop wire comes very close to 50 ohms and any 
> reactance can be removed with a series capacitor. Apart for the 
> cancellation of high angle radiation this configuration is some 
> distance away from support structures.  So many try to configure an 
> inverted L by using their metal towers as supports for the fed end.  
> This sometimes means you are just shock exciting the metal tower and 
> your feed impedance results may be all over the ball park.
>
> I challenge anyone to find a situation where an Inverted "L"  will 
> outperform a properly configured Marconi "T" with an ample ground 
> system on either.
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> Herb Schoenbohm, KV4FZ
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> Topband Reflector
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> Don Johnson <mailto:n4dj at me.com>
> Sunday, August 11, 2013 5:48 PM
> I have not seen a length mentioned for the inverted L, so thought I 
> would note that by making the inverted L longer than a quarter wave 
> moves the high current portion up the vertical. I had good luck with 
> an inverted L about 3/8 wave long. By good luck I mean DXCC plus some 
> on 160. I still am trying to improve. In any event feeding the 
> inverted L with a series capacitor made tuning a breeze. By going 
> longer than a quarter wave made the feed point inductive and raised 
> the R value closer to 50.
> 73,
> Don
> N4DJ
>
> Sent from my iPhone
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> Topband Reflector
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