With correct picture link !!
Hi
I am planning to put a wire yagi for 40m to NA, but suddenly I came over a
picture for a wire log periodic antenna.
I have seen some pictures of wire log periodic antennas on internet,
Just like this one
http://www.antenna.it/military/images%20military/disegno%20lp1530-w%20copy.j
pg
One guy have made one like this
http://www.radiosky.com/super_cheap_log_periodic_antenna.html
He have used spacing between 40 cm - 75 cm(2'5.8" - 1'3.8") for 17mhz -30
Mhz.
My spacing calculation gives:
40 cm is 1/35 wave on 17 Mhz, for first driver * is this optimal calculation
?
75 cm is 1/40 wave on 30 Mhz,? for Rear Reflector * is this optimal
calculation
so my question is then have anyone tried something like this version before?
My idea is to make one for 7 to 21 Mhz ?
should I just put my first driven element on 6 Mhz and then calculate until
21.5 Mhz for reflector?
I don't know what will happen when I get up one as Inverted-Vee in a Log
periodic formation ?
Anyone have a idea to figure the length of elements etc? correct spacing ?
73s Rag LA6FJA
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