View Single Post
  #3   Report Post  
Old November 6th 09, 12:26 AM posted to rec.radio.amateur.antenna
Dave[_22_] Dave[_22_] is offline
external usenet poster
 
First recorded activity by RadioBanter: Oct 2009
Posts: 85
Default Tuning 4 square elements

On Nov 4, 3:16*am, Peter Taggart wrote:
Greetings:

Building a 4 square *antenna system: * *How should I tune each
element? should I *place a 50 ohm load on three *elements * *then tune
up *one using my MFJ 259 *after that element is tuned place the 50 ohm
load on it then tune up the next *element repeat till all have been
tuned?

OR should I short the other three *elements to the counterpoise * tune
the element them repeat till all have been tuned?

Or should * the three be left floating * *then tune the one then
repeat till all have been tuned?


If you are using one of the commercial hybrid phasing networks or one
designed from the 4u1un book proceedure then the normal method is
this:
1. erect ONLY one vertical with its intended ground system.
2. feed it with 50 ohm line and adjust length for resonance at the
center frequency you want
3. replace 50 ohm line with 1/4 wave 75 ohm foam coax (must be foam or
1/4 wave won't reach corners of standard 1/4 wave spaced elements)
4. build other 3 elements identical to the first one.