[RFI] Alvarion Pro 6000 Wireless Internet Hardware? - Follow UP!

Eric - VE3GSI ve3gsi at sympatico.ca
Tue Sep 25 10:11:34 EDT 2012


Follow up:

We decided to go with the Xplornet ISP and the Alvarion ground base hi-speed 
wireless receiver. While upgrading our Internet connection we also purchase 
a new wireless Netgear router and Hitachi 3TB external drive. I am pleased 
to reports good results with the insulation and new equipment.

The hi-speed receiver provided by Xplornet is mounted on my home weather 
station mast, just above roof level and at least 75' from my radio station, 
all coax cables for the Ham radio station come in near the rig, well away 
from the hi-speed Internet receiver. My HF radio antennas are dipoles tuned 
for each band. The CAT 5e shielded cable provided by the dealer has metal 
jacketed RJ45 connectors, also provided is a lightning/static box c/w ground 
connection, all cables were installed by myself. The CAT 5e shield cable to 
the outside receiver also has a separate ground wire.

The Internet termination point inside the house is about 28' away from my 
rigs on the opposite side of the house, which is where I installed the 
wireless router. My Ham station uses two CAT 5 LAN cables (one is for the 
weather station) that run from the new router. These cables are not 
shielded.

The new router is a Netgear WNDR4500 dual band wireless network. I was very 
pleased to see that the RJ45 jacks on the router actually have proper 
connection points for the metal hooded RF45 connectors, the power supply on 
the router has a three prong plug. I did try a LinkSys dual band router and
by comparison the LinkSys in my opinion is a piece of junk with cheap power 
supply light weight construction and no provisions to use shielded RJ45
connectors.However, neither router caused any interference to my HF gear.

Since I have a daytime zero floor noise on HF it is easy for me to see any 
RFI caused by anything in the home. There was a very very slight (and I do 
mean very very slight) increase in noise on HF caused by the wireless 
Internet receiver. So low it is hard to see Icom 756 pro III display, unless 
you have someone plug in the equipment while watching the display. A fellow 
living with existing noise would see no difference.

All the new equipment (including a Hitachi 3TB external drive) have 
switching type power supplies. The router has a fancier power supply with a 
three prong AC plug. There is noise on my portable broadcast band AM radio, 
only, when I put the rig within a couple of feet of the new gear. None of 
these new power supplies are causing me a problem on HF.

So far I have not had a problem with when transmitting with my HF gear, and 
I really don't expect a problem as the old network worked just fine.

73,
Eric VE3GSI
----- Original Message ----- 
From: "Eric - VE3GSI" <ve3gsi at sympatico.ca>
To: "RFI e-Group" <rfi at contesting.com>
Sent: Monday, August 13, 2012 10:06 AM
Subject: [RFI] Alvarion Pro 6000 Wireless Internet Hardware?


>I am considering wireless Internet using the ISP Xplornet, popular here in
> Canada. The dealer tells me they use the Alvarion Pro 6000 4G type 
> wireless
> Internet equipment (~ 3.5 GHz range).
>
> Has anyone here had experience, good or bad, with the Alvarion hardware
> causing interference on the HF bands?
>
> Since this wireless Internet stuff is new to me, is there anything at all 
> I
> should be aware of in the RFI department before making the switch?  Right
> now the HF QRM floor noise at our rural location is, for the most part is
> next to none, so you can see my concerns in wanting to keep it that way.
>
> Your input is greatly appreciated,
> Eric - VE3GSI
>
>
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