Sparring over broadband via TV
March 17, 2007
WASHINGTON -- Microsoft Corp., Google Inc. and other technology companies
are bumping into resistance from television broadcasters as they seek
regulatory approval to deliver high-speed Internet service over unused
television airwaves.
The
You can buy them at Tessco, I'm pretty sure. Stick with Heliax (r) type
cables (hard line) for those distances, and use 1 5/8 minimum. The loss is
amazing at anything above 450 MHz. Look at any cell tower and you will see
what you need to use, then count on twice the loss if you use 2.4 or
Thanks for the reminder. As with most of life, there is no one right
answer.
On towers over 100' or so, radios at the top and pay the climbers as needed.
For shorter towers, which server smaller area anyway, I am looking at
higher power, more sensitive radios at the bottom to offset the cable
Jeez Ralph - your post is misleading to EVERYONE that is reading this.
Do you know what loss per 100ft is on 7/8inch heliax on 2.4ghz which can
be had for $1.50/ft What is your loss at 900mhz on 7/8thinch heliax
? How about lost per 100ft at 5.8ghz on 1 1/4inch heliax ?
Scott - here is the
LAES = lawfully authorized electronic surveillance
Frank Muto
Co-founder WBIA
www.wbia.us
- Original Message -
From: Butch Evans [EMAIL PROTECTED]
To: WISPA General List wireless@wispa.org
Sent: Saturday, March 17, 2007 1:31 AM
Subject: Re: [WISPA] Calea - what will we need
We use both methods, depending on how hard the location is to climb
For locations that are easy to climb, we put the radio at the top.
We've made our radios easy to feild swap on the tower. Four nuts, one
N-connector and an outdoor cat5. This swaps everything except the
antenna and
Has anybody used these? Do they work well? Are they stable?
Can they do 5.3GHz or just 5.8GHz?
Just wondering how they work.
Thanks
Andrew
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Andrew Niemantsverdriet wrote:
Has anybody used these? Do they work well? Are they stable?
Can they do 5.3GHz or just 5.8GHz?
Just wondering how they work.
Thanks
Andrew
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George Rogato
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Have not had to, yet. All my 5.8G stuff is on grain legs or water
towers where I have easy access... Even in bad weather.
George Rogato wrote:
What about 5 gig
Are you doing long runs and amps at 5gig?
Blair Davis wrote:
We use both methods, depending on how hard the location is to
I would be interested in learning more about it.
Anthony
Broadband Corp.
Russ Kreigh wrote:
Yeah, it's completely possible, and will work well, at least once, until
the batteries are gone and need to be recharged.
The issue is the duty-cycle of the charger, your going from a 14ah to
http://www.ubnt.com/litestation5.php4
- Original Message -
From: George Rogato [EMAIL PROTECTED]
To: WISPA General List wireless@wispa.org
Sent: Saturday, March 17, 2007 7:53 AM
Subject: Re: [WISPA] LiteStation5
Got a url?
Andrew Niemantsverdriet wrote:
Has anybody used these?
I would be insterested as well
On 3/17/07, Anthony Will [EMAIL PROTECTED] wrote:
I would be interested in learning more about it.
Anthony
Broadband Corp.
Russ Kreigh wrote:
Yeah, it's completely possible, and will work well, at least once, until
the batteries are gone and need to be
Can youtube be cached?
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OK.Lets talk cable
1. You can't use 1 1/4 or 1 5/8 heliax at 5 Ghz anything. Can't use
7/8 heliax there either. You canbut it won't work right
2. You can use 5/8 heliax at 5.8 Ghz and below.
3. LMR900 is the largest Times cable you can use at 5.8Ghz.
4. You can use 1 1/4
OK.Now for the lesson in CABLE :-P
You can't use 1 5/8 heliax above 2.5 Ghz. Its not rated for it. And
forget 5 Ghz. Won't work.
5/8 heliax MAX at 5 Ghz and above.
-B-
Ralph wrote:
You can buy them at Tessco, I'm pretty sure. Stick with Heliax (r) type
cables (hard
Great post, Bob.
We use LMR600 quite often also for our 5.8Ghz installs, but I don't like to
use it more than 50feet or so, which is about 4db of loss.
Tom DeReggi
RapidDSL Wireless, Inc
IntAirNet- Fixed Wireless Broadband
- Original Message -
From: Bob Moldashel [EMAIL PROTECTED]
If EVERYONE is misled, then EVERYONE needs a lesson in radio- especially you
Jonny-O. My BS as you call it comes from over 30 years in 2 way and data
radio and over 10 years in RF Engineering. But before you tell folks to
leave radios on the ground, you'd better check your sources again.
I'd
As for AMPs
If we put aside the fact that the AMP will result in a non-certified
system Shiren (allrfcables.com) makes a real cool AMP.
Its inexpensive, and tiny. Its got an outdoor Easy to mount inline with the
cable model. It looks like a cylinder the diam of LMR600.
I believe it
Ralph - for someone who has 30yrs of Experience in RF and 10yrs of RF
Engineering you sure don't know much do you other then how to toot your
own horn?
Please give us ALL a lesson in radio
Please give me the calculations of 150ft of LDF4-50A using a 250mw
amplifier with a 17db RX gain..
In an earlier post - Ralph stated 1 cubic yard of cement
60 ft high. 1 vertical antenna
No guys. Even stronger with a house bracket.
I've put up many like this.
This is the same guy that is wanting to give us radio lessons I
certainly wouldn't hire him for any tower installs, due to the
Not all amps are illegal guys. Sheesh.
Yes they have to be included in the system certification and can't be mix
and matched like antennas.
But that doesn't make them illegal!
marlon
- Original Message -
From: Tom DeReggi [EMAIL PROTECTED]
To: WISPA General List wireless@wispa.org
George Rogato wrote:
Can youtube be cached?
Theoretically, it probably could. There are sites like keepvid.com where
you can enter the URL of a video on YouTube (or Google Video, or a bunch
of others), they dig through the HTML and the embedded Flash goo, and
give you a link to download the
100% Correct, Marlon. It doesn't make the amp illegal- just using it on Part
15 stuff that it isn't certified for.
I don't know first hand that this is so, but I believe it was on this list a
couple of years ago that one of the Tranzeo products had an RFLinx Amplifier
inside. If so, I'd be
Out of all the filters out there that you folks have seen, which ones do you
like and why? Do you have their specs and prices?
Can you cite an example of a particular interference a given filter has
solved *for you*?
This is for a 900 Canopy system.
Thanks
Ralph
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WISPA Wireless
Gents! If someone makes a post that has incorrect information, please
correct them! BUT, you loose credibility when you begin personal
attacks and everyone on this list looses! We are adults here - and
adults should be able to have civilized discussion without resorting
to name calling. Debate
Inline
Ralph wrote:
If EVERYONE is misled, then EVERYONE needs a lesson in radio- especially you
Jonny-O. My BS as you call it comes from over 30 years in 2 way and data
radio and over 10 years in RF Engineering. But before you tell folks to
leave radios on the ground, you'd
Bob,
Great example of debating someone versus degrading someone!
Thanks!
RickG
On 3/17/07, Bob Moldashel [EMAIL PROTECTED] wrote:
Inline
Ralph wrote:
If EVERYONE is misled, then EVERYONE needs a lesson in radio- especially you
Jonny-O. My BS as you call it comes from over
Does anyone have current contact information for Jeff
Booher? The number I have has been disconnected.
Thanks!
Kelly Turner
Be a PS3 game guru.
Get your game face on with the latest PS3 news and previews at
I've tried to stay out of this but I can't. grin
I was in the meeting with Bob. He's right.
As for how much cable loss is ok, that's a per link issue. You have to run
your link budgets.
It might be BETTER to have 12dB of coax loss in certain situations. Hell,
I've paid money to drop dB
Dear list,
I have not seen anyone comment on the principle of coax cutoff frequency
and how it can impact the decision to use one size of cable over
another. Some of our customers have run into this problem. The problem
of not being able to install the tower electronics right next to the
Sorry I am not quoting inline- it was getting a bit cluttered.
Good points, Bob.
The brand new cell tower surplus isn't that readily available here. Oh I
see it... cut into 20 ft lengths at the recycling place. Saw some
elliptical waveguide there last week. Made me sick, but I couldn't have
I thought that there was some formula like that out there. Thanks for
posting it!!
marlon
- Original Message -
From: Eric Albert [EMAIL PROTECTED]
To: WISPA General List wireless@wispa.org
Sent: Saturday, March 17, 2007 8:10 PM
Subject: RE: [WISPA] LMR600, LMR900, Heliax
Dear list,
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