Topband: 160m int L

[i4jmy at iol.it]

Sinisa,

also I don’t like L unsymmetry, but what do you mean for an inverted T?
Upper of the loading horizontal wires, the horizontal section of the inverted T, currents are low and radiated energy is very small.

Stated a total wire length, the Rr of an inverted L will depend also by proportions between vertical and horizontal sections. Lower the Rr, lower have to be the ground losses to keep high the efficiency.
It’s worth to point out that Rr and impedance at feed point are two different things. 
Feeding an inverted L at a certain height from ground it’s possible to find out no reactance and also to use a step up transformer to match, but Rr and efficiency remain exactly the same.

73,
Mauri I4JMY

> 
> My first idea would be to try inverted-T instead of inverted-L
> in order to avoid high angle radiation as much as possible.
> Even if not set up exactly symmetrical, it may be
> preferable to inverted-L in terms of radiation.
> 
> Radiation resistance will be lower than for InvL.
> With ~60 ft height it fits 1:4 ferrite rod transformer.
> Plenty of radials are needed, as well as for InvL.
> 
> 
> 73,
> 
> Sinisa  YT1NT, VA3TTN