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Re: [RFI] Fan Noise on Repeater

To: <rrath@charter.net>, <rfi@contesting.com>
Subject: Re: [RFI] Fan Noise on Repeater
From: "Stu Benner" <w3stu@myactv.net>
Reply-to: w3stu@arrl.net
Date: Tue, 9 May 2006 07:34:45 -0400
List-post: <mailto:rfi@contesting.com>

A few questions for you to help better understand the problem:
1) On what band does the repeater operate?
2) What make and model are the repeater radios?
3) What is the operating voltage of the fan?
4) How is the fan controlled (e.g., thermostat, continuous, proportional,
5) From where does the fan obtain its operating voltage?
6) Where on the repeater is the fan mounted and how?
7) Is there noise from the fan on the repeater receiver (with a weak signal
applied) when the repeater transmitter is off?
8) Explain how the repeater was connected to operate from 120 VAC at one
location and battery at another.
9) What is the make and model of the fan?
10) Describe the antenna height and distance from the fan for both sites
11) Describe any other differences in setup between the two sites such as
transmission lines, etc.
12) For what purpose is the fan used?

Stu Benner

-----Original Message-----
From: rfi-bounces@contesting.com [mailto:rfi-bounces@contesting.com] On
Behalf Of rrath@charter.net
Sent: Tuesday, May 09, 2006 12:00 AM
To: rfi@contesting.com
Subject: [RFI] Fan Noise on Repeater

I have a repeater that picks up noise from the fan. When I was 
testing the repeater here at home, it was on 120 v ac power - no 
noise. Now that it is on the hill top it is on battery power - no ac 
power. When the fan turns on, you can hear noise and if you have a 
weak signal into the repeater, the noise will cover you up. I will be 
going to the site this Sat to fix the problem ... I hope. Your ideas on 
how to stop the noise? (having no fan is not an option) Thank you.

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