[R-390] High Electrical hash noise level

[Steve Toth]

I'm experiencing significant noise coming over the 120 volt AC line (S9 levels) when the house gas furnace turns on. I thought that the noise was originating in the blower motor.  It turns out the noise is being generated when the gas burner is "on".  As soon as the burner switches "off" the noise stops.  The furnace is a late model Trane gas furnace with an electronic control board and thermostat.  When the furnace burner is "off" the noise levels are minimal.
 
My station is on the second floor of the house.  I have so far installed a common ground buss bar for the equipment and a ground connection to the electrical system via copper plated pipe strapping (1-3 ohms per my digital meter).  Tisha has generously offered some grounding system suggestions based on what she has done at her QTH; and the next step, based on my location, is an outside ground connection using two inch copper strap, a system of several two foot ground rods and a four foot by twenty foot ground screen with all connections brazed or soldered.
 
The R390A that I am currently using is one that Rick Mish reman'd and has the stock line filter installed and i have added a CL-80 in series with the hot side of the AC line.
 
The antenna is currently an end fed random length wire strung along the railing of the upper house deck with ground counterpoise wires cut for the 80-10 meter ham bands tuned with an MFJ-931 artificial ground system to cancel ground lead reactance. 
 
I'm thinking perhaps a good medical grade line filter some additional MOV's (if the list member putting together the line filter kits needs another test site, please shoot me an email off list - I'll pay for the parts and shipping),and a balanced antenna system away from the house might solve the noise problem.
 
Has anyone else experienced a similar noise situation when installing equipment?  What kind of steps did you take to eliminate the noise coming into the receiver on the electrical wiring?  What suggestions might work?
 
Thanks for any input!








-- Steve, K7PZN 
"Think Quickly, Speak Slowly, Work Diligently, Live Simply"