[R-390] High Electrical hash noise level

[Steve Toth]

Bob
I'll have to find out if anyone (like maybe the Trane servicing dealer whom I think Trane is going to end up referring me to) has something equivalent to an HP-312.  The noise seems to be very broadband in nature though - no matter what frequency I have the R-390A tuned to, the hash just drowns out any signals, so I'm thinking it is electrical.  
 
At least with the suggestions so far I'll be able to determine if the noise is electrical in nature and just traveling through the wiring, or it's RF using the house wiring for an antenna.
 
If it turns out to be very broad band RF(which is possible since it has to do with the igniter in the furnace and could be acting like an old spark gap transmitter with no tuned circuit), I was looking around on the web this weekend and came across the Timewave ACN-4 Noise Canceller - it picks up noise on it's own antenna, shifts it 180 degrees out of phase, then combines it with the original noise to eliminate it.  The article I read by a ham who installed one was favorable.  It's one possible idea if it turns out filtering won't work.








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

--- On Mon, 3/28/11, rbethman <rbethman at comcast.net> wrote:


From: rbethman <rbethman at comcast.net>
Subject: Re: [R-390] High Electrical hash noise level
To: r-390 at mailman.qth.net
Cc: "Steve Toth" <stoth47 at yahoo.com>
Date: Monday, March 28, 2011, 11:21 AM


Steve,

The reason for suggesting something like an HP-312, is you "may" be able to locate a "high concentration" of the hash in a "band" of frequencies.

That would at "least" give you a chance to build a blocking filter.

It comes down to "Been there, done that.  No T-shirt!".

All I managed was a WHOLE stack of dirty words!  LOL!

Bob - N0DGN

On 3/28/2011 2:15 PM, Steve Toth wrote:
> Bob
> Step one completed - emailed Trane via their website.  We'll see what they come back with.
>   I'll pull out my Radio Snack WWV radio and sniff around the furnace and electrical Panel.
> I'll also try the short piece of wire on the antenna connection; and check the line with the oscope to see what I've got.  Good ideas, thanks.
> 
> -- Steve