[frgeek-michiana] Re: Answer: Cable coax antenna
- From: Dale Neddeau <dneddeau@xxxxxxxxx>
- To: frgeek-michiana@xxxxxxxxxxxxx
- Date: Tue, 30 Oct 2007 06:18:21 -0700 (PDT)
--- Mike Cook <mikecook@xxxxxxxxxxxx> wrote:
> The velocity factor will vary depending on the type
> and size of coax, 1/2" or 7/8" hard line is .81 but
> that will vary with other diameters or types of coax
> and the type of dielectric material. The formula for
> determining one wavelength in coax is as follows:
> One Wavelength in coax, in feet = 984 * (Velocity
> Factor) / Frequency in Megahertz (MHz).
> for 2.4GHz: 984* .81/2400 = .3321 ft or about 4"
> Mike
>
Don't know how your reply got in my old e-mail box
but thanks for the info. It is 1/2" so I'll use .81
and I'll start out with just a few section's for the
antenna to see if it works and then I can add to it.
Even four or five elements should be good for some
omni directional gain.
> -----Original Message-----
> >From: Dale Neddeau <dpn@xxxxxxx>
> >Sent: Oct 30, 2007 6:31 AM
> >To: frgeek-michiana@xxxxxxxxxxxxx
> >Subject: [frgeek-michiana] Re: Answer: Cable coax
> antenna
> >
> >
> >> ----- Original Message -----
> >> From: "Richard Zimmerman" <ke4rit@xxxxxxxxxxxx>
> >> To: frgeek-michiana@xxxxxxxxxxxxx
> >> Subject: [frgeek-michiana] Answer: Cable coax
> antenna
> >> Date: Mon, 29 Oct 2007 16:07:19 -0400
> >>
> >>
> >> I got a reply back from y friend...
> >>
> >> Richard
> >>
> >> <reply below>
> >>
> >>
> >> What size and type of cable?
> >>
> >> Anywhere from .87 to .71
> >>
> >> They can try www.comscope.com and see if anything
> is on there.
> >> Either that or a Google on the actual brand/size
> should pull up
> >> info.
> >>
> >>
> >>
> >> Jason
> >>
> > I was hoping for better than that, I had seen
> something that narrowed it down to .81 to .87. Well
> I guess I'll just try to make it using something
> within that range. Not at all sure it will work.
> >
> >Dale
> >> -------------- Original message
> ----------------------
> >> From: Richard Zimmerman <ke4rit@xxxxxxxxxxxx>
> >>
> >> > > Hey,\
> >> > > > Would you mind answering this for
> us....
> >> > > > Thanks and much appreciated...
> >> > > > Richard
> >> > > > > -------- Original Message --------
> >> > > Subject: [frgeek-michiana] coax cable
> antenna
> >> > > Date: Sun, 28 Oct 2007 13:08:32 -0500
> >> > > From: Dale Neddeau <dpn@xxxxxxx>
> >> > > Reply-To: frgeek-michiana@xxxxxxxxxxxxx
> >> > > To: frgeek-michiana@xxxxxxxxxxxxx
> >> > > > > > Hey, is there anyone out there that
> would know what the
> >> > velocity factor of > cable tv hardline coax
> would be. I will try
> >> > to make a coax collinear antenna for > WiFi .
> but without that I
> >> > could only make a guess and it would probably
> be > wrong. Goose,
> >> > maybe one of your buddies over at comcast might
> know. I didn't >
> >> > know about setting up a free WiFi station or
> what ever you call
> >> > it untill Tom > said something about it last
> thursday.
> >> > > > Dale
> >> ** This list is PUBLICLY archived. **
> >> PLEASE don't post personal or sensitive
> information unless you wish
> >> for it to be in the public domain.
> >>
> >> To post to the list send email to
> frgeek-michiana@xxxxxxxxxxxxxx
> >> The archive is available at
> //www.freelists.org/archives/frgeek-michiana/
> >>
> >> You may unsubscribe or change your list settings
> by going to the
> >> list website at
> //www.freelists.org/webpage/frgeek-michiana
> >
> >>
> >
> >
> >--
> >Want an e-mail address like mine?
> >Get a free e-mail account today at www.mail.com!
> >
> >** This list is PUBLICLY archived. **
> >PLEASE don't post personal or sensitive information
> unless you wish for it to be in the public domain.
> >
> >To post to the list send email to
> frgeek-michiana@xxxxxxxxxxxxxx
> >The archive is available at
> //www.freelists.org/archives/frgeek-michiana/
> >
> >You may unsubscribe or change your list settings by
> going to the list website at
> //www.freelists.org/webpage/frgeek-michiana
> >
>
> ** This list is PUBLICLY archived. **
> PLEASE don't post personal or sensitive information
> unless you wish for it to be in the public domain.
>
> To post to the list send email to
> frgeek-michiana@xxxxxxxxxxxxxx
> The archive is available at
> //www.freelists.org/archives/frgeek-michiana/
>
> You may unsubscribe or change your list settings by
> going to the list website at
> //www.freelists.org/webpage/frgeek-michiana
>
>
__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com
** This list is PUBLICLY archived. **
PLEASE don't post personal or sensitive information unless you wish for it to
be in the public domain.
To post to the list send email to frgeek-michiana@xxxxxxxxxxxxxx
The archive is available at //www.freelists.org/archives/frgeek-michiana/
You may unsubscribe or change your list settings by going to the list website
at //www.freelists.org/webpage/frgeek-michiana
Other related posts:
