[Elecraft] Beam antenna question

Ted Edwards W3TB w3tb.ted at gmail.com
Sun May 21 21:39:35 EDT 2017


Years ago in grad school I strung antenna of 22 gauge green enameled bell
wire, and it was so hard to see that I would go outside and look up to see
it against the sky to check it before operating.   Even I couldn't see
it... only ran 150 watts on it.

On Sun, May 21, 2017 at 15:42 Fred Jensen <k6dgw at foothill.net> wrote:

> Indeed!  Apollo 11 landed close to 2 km downrange from the center of the
> planned landing footprint.  This was the result of a lunar gravitational
> potential model that didn't exactly match the real world.  No one
> screwed up, the computer worked correctly, the potential model was fine
> except that it possibly applied to some other moon in the solar system,
> of which there are many, just not to ours.
>
> NEC-2 [e.g. EZNEC] is a good model but one has to be knowledgeable of
> its limitations.  It can, for example, return wildly wrong source
> impedance values if the source is connected to the end of a wire.
>
> 73,
>
> Fred ("Skip") K6DGW
> Sparks NV USA
> Washoe County DM09dn
>
> On 5/20/2017 10:18 PM, Jim Brown wrote:
> >
> > Brown's first law -- "if you think there's a difference between theory
> > and practice, you don't know enough about one or the other."
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to w3tb.ted at gmail.com
>
-- 
73 de Ted Edwards, W3TB and GØPWW

and thinking about operating CW:
"Do today what others won't,
so you can do tomorrow what others can't."


More information about the Elecraft mailing list