[Collins] Cell Phone EMC

[Ean Retief]

===========================
P.J. (Ean) Retief - DURATEL
Office Tel: +27 83 658-1318
Facsimile : +27 86 510-0029
Residence : +27 21 976-8777
E-mail: Duratel at Adept.co.za
===========================

Danny,

I have a Cellular Base Station ON my tower (I rent the tower to the
Cell phone Company). The Cell antennas is four feet from my HF
antenna.

It is a 900 MHz GSM (“PCS”) station with 50 Watt transmitters.
I have absolutely no problem on any HF band and neither on 2 m.

The only interference I have is three small “birdies” at the top end
of 20 metres and one on 15 metres.  This actually comes from the
“optical fibre to copper” unit of the local phone company that supply
the connections for Cell Base.

73,

Ean ZS1PR



>From: "Danny Lunstrum" <dlvnstru at netins.net>
>To: <collins at mailman.qth.net>
>Subject: [Collins] Power Inverter Question
>Date: Wed, 26 Jul 2006 12:01:23 -0500
>
>Good Afternoon Group,
>
>US Cellular is planning on installing a cellphone site approximately 1300' 
>from my amateur radio/short wave listening station and I am very concerned 
>about possible interference.
>
>In visiting with Mike Gruber at ARRL, he suggested that I take a portable 
>communications receiver and monitor the amateur and short-wave bands with 
>the rig around     1300' from a cellphone site and see what kind of 
>interference I can pick up.
>
>My question concerns using a 51S-1 receiver and powering it from a power 
>inverter with a 12v input.
>
>The two that I looked at stated that the output was a "modified sine wave 
>output."
>
>Would it possible to damage the power supply section of the 51S-1 if I used 
>a 12 VDC to 115 VAC power inverter to power it?
>
>Thank-you for your thoughts,
>
>
>Dan Lunstrum
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