Topband: Receiving Loops

[i4jmy at iol.it]

Kevin,

think about detuning your 160m transmitting antenna when receiving, this is the first step.
Then, if the problem is still clearance, you can try with a simple loop antenna in the following way. 
(I'd say a good loop is not less than 7' in diameter, if made of aluminium tubing, some couple of inch diameter will give you enough signal not to need any preamp.)
Carefully rotate the loop to have a notch with the transmitting antenna, whose thing will happen with the loop (the plane of the loop) normal (or nearly normal) with the transmitting antenna. It will correspond to the point where the received noise is minimized while turning. Better if you do it in daylight.
Note that loop pattern has two notches at zero elevation, perfect for local noise killing. 
At useful angle its pattern is not much directional, so you won't lose so much with a fixed loop.

73 & HNY

Mauri I4JMY
   


> Hello All,
> 
> I'm still struggling with trying to improve my receive antenna situation.
> Despite everyone's good intentions, I simply do not have the room to put up
> a flag or pennant or even a K9AY loop and get any clearance from the
> transmit antennas.  I have tried a coaxial loop and, if I can ever get my
> PT3 modified by the friend who has it, I can try it again.  However, I
> wonder if anyone on the list has tried the Palomar or Kiwa indoor loops and,
> if you have, what is your opinion of them compared to other types of low
> noise antennas?
> 
> Thanks much for any help you can give and very 73.  Happy New Year to
> everyone.
> 
> Kevin :)
> Amateur Radio:  K7RX