Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[RFI\]\s+RFI\s+from\s+furnace\/air\s+conditioning\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[RFI\]\s+RFI\s+from\s+furnace\/air\s+conditioning\s*$/: 6 ]

Total 6 documents matching your query.

1. [RFI] RFI from furnace/air conditioning (score: 1): Author: D C _Mac_ Macdonald <k2gkk@hotmail.com>; Date: Fri, 2 Nov 2018 23:04:58 +0000; I have fairly recently gotten back on the air after a few years off. This is AFTER I had to have our HVAC replaced. It is a Lennox SL280UH090V48B-03 which is a variable BTU and variable speed fan sys; /archives//html/RFI/2018-11/msg00007.html (6,714 bytes)
2. Re: [RFI] RFI from furnace/air conditioning (score: 1): Author: "Randy Standke" <r55stan@gmail.com>; Date: Fri, 2 Nov 2018 17:07:59 -0700; I don't know about Lennox in particular, but I was getting RFI from a Carrier furnace. It had a variable speed motor. I could see the RFI change as the motor ramped up to speed. The first thing I did; /archives//html/RFI/2018-11/msg00008.html (8,649 bytes)
3. Re: [RFI] RFI from furnace/air conditioning (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Fri, 2 Nov 2018 17:26:54 -0700; Great diagnosis and great advice, Randy. Variable speed motor controllers are notorious sources of RF noise. The drive to the motor is a modulated rectangular wave, so it's the wiring carrying that; /archives//html/RFI/2018-11/msg00009.html (9,370 bytes)
4. Re: [RFI] RFI from furnace/air conditioning (score: 1): Author: "Ed" <ed_richardson@shaw.ca>; Date: Sat, 3 Nov 2018 07:39:39 -0500; I believe we have the same HVAC unit as you do and indeed found some unacceptable RFI coming from the unit. Lennox is actually aware of this and will provide a filter kit (ours was at no cost) consis; /archives//html/RFI/2018-11/msg00010.html (8,424 bytes)
5. Re: [RFI] RFI from furnace/air conditioning (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Sat, 3 Nov 2018 10:29:50 -0700; Hi Ed, Simply clamping a ferrite onto a wire carrying RF noise has little effect on it on the HF bands. We must wind turns of the wire through the core. I wrote a tutorial on this a few years ago fo; /archives//html/RFI/2018-11/msg00011.html (9,606 bytes)
6. Re: [RFI] RFI from furnace/air conditioning (score: 1): Author: "Ed" <ed_richardson@shaw.ca>; Date: Sat, 3 Nov 2018 13:42:48 -0500; Sorry Jim Of course simply passing a wire through a clamp on ferrite has minimal effect. Even the Lennox instruction for their RFI kit showed winding two turns around the ferrite bead. I imaginge the; /archives//html/RFI/2018-11/msg00012.html (10,917 bytes)

Current List: 1 - 6
Page: [1]