Topband: Receive loop observations

[James Rodenkirch]

I have installed a receive loop (  http://www.qsl.net/kc2tx/  ) and finished measuring and observing...


Measurements:


VSWR --- 1.7 @ 1.830

ZO ----- 77 at 1.830


Observation:


Following ON4UN's comments regarding needing a preamp or not, measured S1 to 2 noise level with antenna connected during mid-day, S0 with dummy load connected.


During evening hours, notice some improvement - S2 drop in noise level when switching from xmt antenna (inverted U) to the loop - but not hearing much in the way of receive signals (e.g., hear a fairly strong signal from the west coast on the xmt antenna, nothing on the loop and I have it oriented east/west).


I'm uncertain if a low noise amp will help my cause (thoughts??)


I do not have a common mode choke installed, yet...will one make that much difference?


The loop is located about 60' away from the Inverted U and radials.


Comments/suggestions appreciated.



Thank you, in advance, for constructive, relative to what I have now, replies....non-"constructive" means I can't erect a BOG, Beveridge or Waller Flag so don't ask why I didn't go that route.


71.5/72 de Jim Rodenkirch K9JWV