Question about extending antenna cable length

I recently bought a pair of Cushcraft S2403B omnidirectional antannae
with the RP-TNC connector. It connects to a Cisco Aironet 350 bridge.

Cisco sells the extension cable, but it is expensive ($5.oo/foot)

I was wondering if there is anything special about Cisco's cable that
I couldnt just make my own.

I was thinking that I would cut the attached antenna cable, put BNC
ends on it and the extension cable, then put it back together again.

Any reason I shouldnt do this?

BTW...the total extended length of the cable will be 50 feet

Thanks

Tom Mahan <(E-Mail Removed)> wrote:
> I recently bought a pair of Cushcraft S2403B omnidirectional antannae
> with the RP-TNC connector. It connects to a Cisco Aironet 350 bridge.

> Cisco sells the extension cable, but it is expensive ($5.oo/foot)

http://www.hyperlinktech.com
I sent them a scanned image of the back of my WAP, because I couldn't
decide what connector it was. They have a simple "worksheet" for getting
quotes on cables. Or you could send email describing what you want.
If you gave them a Cisco part number for a cable, I'm sure they could use
that.
http://www.hyperlinktech.com/web/pdf..._worksheet.pdf

A cheaper store might be http://sky2web.net. They have almost any kind of
pigtail and/or cable you would want. I ordered from them and received my
package 2 days later, also if there is any kind of problem they want to know
about it and fix it right away.
<(E-Mail Removed)> wrote in message
news:bidpju$lvs$(E-Mail Removed)...
> Tom Mahan <(E-Mail Removed)> wrote:
> > I recently bought a pair of Cushcraft S2403B omnidirectional antannae
> > with the RP-TNC connector. It connects to a Cisco Aironet 350 bridge.
>
> > Cisco sells the extension cable, but it is expensive ($5.oo/foot)
>
> http://www.hyperlinktech.com
> I sent them a scanned image of the back of my WAP, because I couldn't
> decide what connector it was. They have a simple "worksheet" for getting
> quotes on cables. Or you could send email describing what you want.
> If you gave them a Cisco part number for a cable, I'm sure they could use
> that.
> http://www.hyperlinktech.com/web/pdf..._worksheet.pdf
>

"Tom Mahan" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) om...
> I recently bought a pair of Cushcraft S2403B omnidirectional antannae
> with the RP-TNC connector. It connects to a Cisco Aironet 350 bridge.
>
> Cisco sells the extension cable, but it is expensive ($5.oo/foot)
>
> I was wondering if there is anything special about Cisco's cable that
> I couldnt just make my own.
>
> I was thinking that I would cut the attached antenna cable, put BNC
> ends on it and the extension cable, then put it back together again.
>
> Any reason I shouldnt do this?
>
> BTW...the total extended length of the cable will be 50 feet
>
> Thanks

Don't use BNC connectors for 2.4GHz! The connector loss will be too great.
Also, why are you willing to sacrifice half your signal in cable loss? I'll
assume the Cisco cable is LMR400 which has an attenuation of about 3.4 dB in
50 feet of cable. 3.4 dB of attenuation means you lose more than half your
receive signal as well as more than half your transmit power. A better way
is to put the access point AT the antenna and use cat 5 to connect the
access point down to your wired network.

Also, onmidirectional antennas are the wrong choice for a bridge. I assume
that both ends of the bridge are at fixed locations, so it's not helpful to
radiate the signal equally in all directions. A much better choice would be
directional antennas on each end. This will substantially improve signal
levels at both ends and reduce interference from and to your bridge.

Don W.