Topband: 5/16 vs 1/4 wave length inverted L

[tzikas tzik]

hi, and thank you for your answers. How many radials i must install at least
for good results?

On Thu, Jul 29, 2010 at 1:59 AM, <k8gg at voyager.net> wrote:

>
>
> Tzikas Tzik wrote:
>
> "> hi. thank you for your answer. What elevation angle has the 5/16
> inverted
> > L
> > and what elevation angle has the 1/4? Must i will reduce the total lenght
>
> > from 5/16 to 1/4 for higher local signal or the difference is just a
> > little
> > bit, and to keep the 5/16 inverted L? If i keep the 5/16 inverted L what
> i
> > must change to increase the signal? Now i am using 6 radials (4 1/8 and 2
>
> > 1/4).which are constructed with insulated wire and are placed on the
> > ground.
> >
> > Moreover, what do you think about T antenna?
> > My transmitting area is like this draw:
> > http://tzitzikas.webs.com/transmitter_area.JPG
> > In the front of transmitter's house, there is a third building with 6
> > floors. So, the vertical portion of my antenna is found between 3
> > buildings.
> > I think it is a problem for the signal transmittion. What do you propose?
>
> > Now, for match system with my 50ohm transmitter, i am using a variable
> > series capacitor (0-500pf).
> ----- snip ----
>
> Hi All,
>
> I agree with Guy and others that the radiation angle changes so little as
> to not be a problem.
>
> Looking at your PDF diagram, I would suggest you should add as many more
> radials 20m or longer each as you can install on top of the middle building
> to enhance radiation and lower ground losses.    That may lower your feed
> point inpedance to below 50 ohms.  But in that we will help you deal with it
> then.
>
> Good luck OM     73 to all
>
> George  K8GG
>