[CQ-Contest] [MWA] New furnace... off topic, but related to contesting

[Carl Vangsness]

A lot of times the noise comes from the controller, not the motor. If you see increased QRM, ferrites on the AC line to the controller will reduce the hash going back to the AC line. Also ferrites on the motor leads as well.

the more pricey controllers will have a switching frequency of 3, 6, 8, 12, or 16 KHz. It will be interesting to see what yours turns out to be.

73, Carl N9GC

----- Original Message -----
From: "Robert Chudek - K0RC" <k0rc at citlink.net>
To: "Minnesota Wireless Association" <mwa at w0aa.org>, cq-contest at contesting.com
Sent: Thursday, December 10, 2009 3:18:11 PM GMT -06:00 US/Canada Central
Subject: [MWA] New furnace... off topic, but related to contesting

The serviceman just left after installing a new furnace controller. I am considering replacing the P.O.S. furnace that has kept the repair department in an unforecasted revenue stream the last 5 years.

There has been advancements in technology in the past 17 years. This includes a variable speed DC blower motor upgrade from a multi-speed AC motor. Does anyone have any experience in the newer technologies in regard to my HF gear? Specifically, a variable speed DC motor sounds like it might be an RFI generator.

73 de Bob - KØRC in MN
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