[600MRG] Active antenna suggestions

[Brian Pease]

I have an active E field antenna from lfengineering.com, their L400B, 
which is for 10-500kHz.  It has a low pass filter between the antenna 
and the FET.  I have it mounted about 25 ft high, which turns out to be 
excessive.  I have 4 copper pipe ground stakes at the bottom of the 
fiberglass pole to ground the shield of the feedline and define the 
antenna as being out in the field.  I added a common mode toroid to the 
RG6 feedline between the ground stakes and the house for further noise 
isolation.  This setup is solidly atmospheric noise limited, even on my 
insensitive Rycom selective Level Meter.
I would consider mounting it just 10 ft off the ground unless you need 
more gain.  Many don't understand that the length of an E probe antenna 
is really measured from ground level to the top of the probe, 25 ft on 
my case.  The shield of the coax feed (down to where it is grounded) 
makes up most of the antenna.  The Hi-Z amp in the probe merely allows 
it to be inserted near the top of the vertical antenna.

On 6/17/2015 6:38 PM, ejkkjh at gmail.com wrote:
> I am trying to set up a WSPR receive only and looking for suggestions on active receive antennas.  I would like to run WSPR receive for 600 meters using an active antenna.  It can be either outside or inside, but something not too big or high to be reasonably safe from lightning, I have had several strikes.  I would prefer not to build one, very busy with work, etc.  Receiver is a Softrock Ensemble II LF.
> Any suggestions would be appreciated.  Thank you.  73
> Emory  WM3M
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