Jim Lux wrote:
>On 12/30/11 12:44 PM, Jim Brown wrote:
>
>
>>On 12/29/2011 8:40 PM, David Jordan wrote:
>>
>>
>>>I've been lectured to that just putting up an antenna and trying it out is
>>>not a good practice... one should first read and learn learn learn.
>>>
>>>
>Naah...
>
>I'm a big fan of "go try it" but perhaps with some thought ahead of
>time. And if the weather is bad, or you've got other things to do, then
>a bit of analysis isn't amiss..
>
>
>Having gone through all this over the last couple days, I've been
>thinking about how to actually go out and test it. I'm thinking about
>balloons and battery powered transmitters in the middle of a dipole, or
>hanging it from a 40 foot pole or something. I could order a cheap
>clock oscillator for something like 14.1 MHz or 7.05 MHz, run it off a
>9Vto 5V or 3.3V regulator, use a resistive pad and drive a not
>necessarily resonant dipole. Head on down to the local park where
>there's a variety of trees of different kinds. Some friends could make
>the received power measurements.
>
>And, given the modeling and calculations, those power measurements are
>going to have to be fraction of a gnat's eyelash. Actually, what I
>would look for is that there's ANY discernable difference (because I
>don't expect any.. measuring a 1% difference in power is difficult)
>
>(actually, what I'd really like is some kid who needs a good science
>project to do the tedious measurement work.. but that's because I'm
>sitting here lazy and full from holiday overeating)
>_______________________________________________
>
>
>
>_______________________________________________
>TowerTalk mailing list
>TowerTalk@contesting.com
>http://lists.contesting.com/mailman/listinfo/towertalk
>
>
>
Well, lets see, if you find that the trees do not have much effect we
can all rest easy and get back to playing with ham radios.
If you find that trees do have a big effect are you going to move out of
the forest or cut down the trees around you?
For those who believe in learn, learn, learn; you learn, learn, learn by
doing, doing, doing.
Sometimes you have to do more than once.
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|