The Cotek S300-112 is quiet.  Cotek and Samlex are the same company or 
divisions of the same company.  I bought the S300 about 5 years ago and 
measured it with a LISN and spectrum analyzer and while I could see 
emissions they were well below FCC part B.  I have never experienced any 
interference while mobile.  The S300 is intended for ambulance use I was 
told.
Larry, W0QE
On 9/26/2015 7:48 PM, Jim Brown wrote:
 
On Sat,9/26/2015 4:23 PM, Michael Coslo wrote:
 Now the question is, has anyone silenced one of these inverters 
successfully?
 
 Some inverters are quieter than others. I've not encountered any of 
the Samlex units, but from studying data sheets, it seems that there 
are two product lines, one of which meets more stringent specs for EMC 
and has Safety Agency approvals.
Others who own one of these units might comment.
73, Jim K9YC
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