[RFI] Interference from Oil Burner Ignitor

David Robbins k1ttt at arrl.net
Sun Dec 1 10:45:23 EST 2013

Tell them it is interfering with your AM radio reception... you can suspect that maybe a ground wasn't reconnected, or maybe a bolt isn't holding it tight to the case, or maybe a dirty connection, or even possibly a cut wire or a hv wire too close to some metal that is arcing.  In any case it shouldn't interfere, especially to AM radio or an audio system.

David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://wiki.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://k1ttt.net

-----Original Message-----
From: RFI [mailto:rfi-bounces at contesting.com] On Behalf Of Bob at N2SCJ.net
Sent: Sunday, December 01, 2013 14:27
To: rfi 
Subject: [RFI] Interference from Oil Burner Ignitor

I recently had the igniter fail on my oil burner.  The replacement was an Allanson 2275-U as per the bill.  The interference comes through over top of a station on the AM Broadcast band (KYW-1060).  Its also getting into one of my FM rigs and/or my audio distribution system.  I can figure out which one it is as soon as I can walk again (burst Baker's cyst).  I can tell it’s the heater as I hear it start and at same time the tick, tick, tick, tick, sound comes over the AM radio.  The noise lasts for about a minute and burner continues to fire.  There is a logic circuit built into the heater that deactivates the igniter once circuit is sure the fire is burning.  I believe that is why the noise stops before burner shuts down.

The old igniter was RF quiet when it was working.  Probably even quieter once it failed.

This is a new install done on 11/27.  I have not paid the bill yet, so I have some leverage with the service company.  I think the igniter would be classified as an un-intentional radiator.  Any thoughts on how to proceed?


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