[amsat-bb] curious question

[Greg D]

Hi Bob,

Trees probably do have an effect, but unlike others, I've not found it
to be a significant problem.  At least, not one where I need to plan my
passes around which trees might be in the way.  The only time they did
was with AO-40, where transmitting on 70cm directly into a huge oak tree
would have the signal bounce back and interfere with the 2.4 ghz
downlink.  One could map out where the limbs were based on the results.

In an area of the country where shade in the summer is prized more than
many other things, taking a chain saw to a heritage-sized oak tree in
pursuit of a QSO just wasn't an option.  So, AO-40 contacts to the
south-east never happened.  Then "unintended chemistry experiments in
space" made it no longer relevant.  {sniff}  The only issue I have with
the trees now is to keep them trimmed appropriately so they don't snag
the antennas as they swing round.

Greg  KO6TH


Bob- W7LRD wrote:
> Hi All- Just wondering-in the real world how much attenuation is there with trees?  I am surrounded with fir trees, a huge maple tree and cedar tree, (I live in the north west).  I run  a IC-910, preamps at the cp yagis.  
>
> 73 Bob W7LRD
>
> Seattle
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