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
> 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
** 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
> Peter G3RZP
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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