[RFI] Interference from Oil Burner Ignitor

[Dale J.]

How old of a furnace is it Bob.  Our gas job uses a ceramic thing, like a glow plug.  I do remember the old oil furnace use a spark gap.  You could hear it buzzzzit on startup.  Sometimes the thing would buzzzzzit for a long time before ignition, hi.  

Dale, k9vuj



On 11, Dec 2013, at 16:36, Bob at N2SCJ.net wrote:

> I watched the Tech do his thing.  Tech closed the spark gap on igniter a little.  He used some sort of go no/go gauge to bend electrodes.  Also he bent up the electrodes so that they would be more likely to make contact with igniter springs and therefore eliminate one set of arcing contacts. Tightened AC wire connections.  It reduced the problem, but did not eliminate it.
> 
> Bob
> 
> -----Original Message----- From: David Robbins
> Sent: Sunday, December 01, 2013 10:45 AM
> To: Bob at N2SCJ.net ; rfi at contesting.com
> Subject: RE: [RFI] Interference from Oil Burner Ignitor
> 
> 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?
> 
> Bob
> 
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