[Amps] Antenna traps

[R.Measures]

On Dec 15, 2005, at 12:16 AM, Peter Chadwick wrote:

>
>
> Rich said:
>
> >One advantage of a trap-less center-fed wire fed with ladder-line and 
> a
> balanced L network tuner is that if it turns out that a reactance arcs
> or melts down, retrofitting a more capable L or C does not require
> bringing down the antenna.<
>
> However, the classic parallel or series tuner has the advantage that 
> the working Q can be controlled, which is not the case with an L 
> network.

**  An L-network always has the lowest Q possible.  Is mo' Q mo' betta?

> In the L network, the working Q is fixed by the impedance 
> transformation ratio. So an impedance which leads to the matching 
> network working Q being high in an L network

**  porcine shampoo with conditioner.

> can lead to flashover or melting, while the parallel or series tuned 
> circuit can have its proportions set to prevent this. Suitable designs 
> appeared in ARRL handbooks 50 years ago.


>
> But the other advantages of the centre fed open wire line dipole 
> remain. Plus it's inherently capable of use over a very wide frequency 
> range.
>
Quite
>
> Peter G3RZP
>

Richard L. Measures, AG6K, 805.386.3734.  www.somis.org