[amsat-bb] curious question

[Don KB2YSI]

If you are working with 5w into a handheld Yagi trees + leaves are rough.
Running +50w into huge yagis with preamps they probably do not matter too
much on 2m/70cm, above that and they certainly will.

Different answer for different operating conditions.

73, Don KB2YSI

On Fri, Sep 14, 2018, 18:51 Jeff Johns <jeff30339 at gmail.com> wrote:

> Trees with wet leafs on them tend to gobble up UHF uplinks. It’s not quite
> as bad on VHF but can have an affect.
>
> Jeff WE4B
>
> > On Sep 14, 2018, at 3:51 PM, Paul Andrews <w2hro.fn20 at gmail.com> wrote:
> >
> > Trees cause real attenuation on both 2M and 70cm.  Near field effects are
> > more pronounced that far field.
> >
> > It's not a hobby killer but it will degrade your performance.
> >
> > Trees are a hobby killer for EME on 2M and above.
> >
> > 73 - Paul - W2HRO
> >
> >> On Fri, Sep 14, 2018, 16:46 Bob- W7LRD <w7lrd at comcast.net> 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
> >> _______________________________________________
> >> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> >> to all interested persons worldwide without requiring membership.
> Opinions
> >> expressed
> >> are solely those of the author, and do not reflect the official views of
> >> AMSAT-NA.
> >> Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> >> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
> >>
> > _______________________________________________
> > Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> > to all interested persons worldwide without requiring membership.
> Opinions expressed
> > are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> > Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> > Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>