[TowerTalk] Tower location and house noise

[Grant Saviers]

Adding a few thoughts to what others have said, and based on some 
anecdotal experience:  My towers are 50' to 110' from the shack and 
located for what I could do within lot constraints for minimizing 
pattern overlap for Asia and EU azimuths from my WWA QTH.  For a 
suburban location I think I hear fairly well, often better than my QRO 
talks, probably because of noise at the other end, unless I encounter a 
TV, switcher, or power line QRM at times.  But a lower noise floor is 
always better.

I bury all coax and control lines.  They make good antennas if elevated 
and chokes aren't 100%.

And use at least double shielded (premium foil plus braid) coax or 
hardline.   Only hardline approaches 100% shielding.

Likewise, I now mostly use DIN's.  There is a lot to be learned from the 
cell business re connectors, grounding, waterproofing, and PIM.

If possible, I run coax and control lines inside the tower, it is a free 
Faraday shield.  My crankup with the 9917 coax hanging outside in the 
air is noisier than the fixed tower with the hardline coax all inside.

Control lines that go near antennas can be a source of noise.  My soon 
project is to filter/choke my SteppIR control lines with that in mind.

I prefer antennas with minor high angle lobes at the height I install 
them.  I think it is better to sacrifice a db of gain for a better 
pattern.  I've modeled a 6L 17m extensively and the "handbook"  design 
can be substantially improved in this regard.

A walk about with my PL660 Tecsun radio was informative about noise 
sources to be tamed.

I'm also adding a loop receive antenna for sharp nulls of point noise 
sources.

Grant KZ1W







On 5/22/2017 17:06 PM, RLVZ--- via TowerTalk wrote:
> Guys,
>   
> I'm wondering if some of you locate your tower(s) away from the  shack for
> the single purpose of minimizing man made  noises?  I have K9YC's material
> on reducing man made noises but I  haven't had a lot of success.  I'll soon
> be constructing a new  tower and am wondering if it's worth placing the tower
> a 100' from the  shack in hopes of reducing man made noises?
>   
> Thanks & 73,
>   
> Dick- K9OM
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