[Moon-net] X2 or Xpol

[Dave Anderson, K4SV]

Hi Jim,
 
I am new to EME also but I can tell you one thing for sure.
 
I started EME using M2 2MXP20's (2) and have upgraded to 4 on an H frame now.  I would not trade my Xpols for anything and here's why.  During most QSO's I am running differential where I may receive V and Transmit H.  But this varies from day to day and sometime from hour to hour in any one of 4 combinations.  I built a simple switch to select a polarity for RX and TX and set it for each QSO.  My Microham Digikeyer computer interface provides the necessary TX/RX sequence delays and drives the home brew polarity switch and AMP.  If you run one polarity its easy to get locked out for the day wasting your available time you have for the radio.
 
If I had the choice to have an H frame full of horz polarized antennas or one single Xpol'ed antenna, knowing what I know now, I would take the single Xpol antenna any day.  My recommendation is to add the new antenna in V polarity and build a switch.  Just don't switch the TX hot.
 
See you on the moon,
 
Dave Anderson, K4SV
Tryon, NC
828 777-5088
 
www.K4SV.com


----- Original Message ----
From: Jim Stevenson <gi0ijb at talktalk.net>
To: moon-net at list-serv.davidv.net
Sent: Saturday, January 19, 2008 10:50:12 AM
Subject: [Moon-net] X2 or Xpol

Hello
new too eme ,have worked some of the bigger stations with 1x9 400w 
I am going to add a 2nd 9ele Should I go stacked for gain or set one Vertical for Xpol?

Jim GI0IJB
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