Topband: Quarter wavelength stub as trap

Fri Apr 8 19:08:10 EDT 2005

Good night from Italy.
What do you think about using a quarter wavelength shorted stub, made with 
coaxial cable, as trap for an 80m + 160m inverted L?
15.6m of RG213, shorted at one end, will block 80m and will represent about 
50 OHM of XL on 160m or it will only invert the phase on 80m and work like a 
lossy inductive reactance on 160m?
It would be nice to insert this stub into a quarter wavelength, aluminium 
made, vertical for 80m, connect the coax cable braid to the top of the pole, 
connect to the inner conductor of the cable an horizontal wire to resonate 
the system on 160m and have a working 80m + 160m inverted L...
73 and thanks
Ciao
Guido, ik2bcp