[NLRS] loop yagi driven element corrosion

[Ray Johnson]

Hi All

In a later RSGB publication, Radcom I think, it was suggested that the 
original design was not the best for long term reliability.

The claim was that the bottom of the loop is a high current point and 
having an overlapping  joint there is bad for the long term.

The revised design would rotate the overlap point by 90 degrees and 
require 2 fasteners for each element: A long fastener to hold the 
element to the mast and then a short fastener to handle the overlap 
point. The claim is that this improves the reliability.

I am sorry I don't exactly remember where I read this.  A friend gave me 
some 20+ years of Radcom back issues and it would take a while to find 
that article

Worth the extra effort when you build a looper ?..........I will leave 
that discussion to the pontification crowd......

rayj  WB0EBG


On 9/14/2016 11:19 PM, Dr. Gerald N. Johnson wrote:
>
>
> In VHF Communications for 1/1978 an article on loop yagies suggested 
> the driven element and feed along with the screws be coated with 
> polyurethane lacquer and when it dried, the entire antenna be coated 
> with ordinary lacquer. Somewhere I have a vintage RSGB microwave 
> publication with a chapter on loop yagis, but I haven't turned it up 
> in my first search this evening.
>
> 73, Jerry, K0CQ
>
> On 9/14/2016 9:40 PM, Chris Elmquist wrote:
>