Hi, just a couple of thoughts from a new guy on the list.  Is 
your equipment thoroughly and properly grounded? Second, have you 
ever tried those little snap-on iron loops that you rap your 
power cord in) I know your speakers don't have wires, but if you 
put the power cord of your rig into the loop it may help.  I use 
those things here and they cut down SSB RFI significantly into my 
computer speakers which are notorious for picking up stuff.  Jim 
WA6EKS

 ----- Original Message -----
From: Steve Dresser <[log in to unmask]
To: [log in to unmask]
Date sent: Wed, 9 May 2012 22:53:05 -0400
Subject: Re: One Other Thought about the RFI in the Speaker

Tom,

Do you get RFI if you run barefoot?  If not, you may have some
amplifier-specific issues.

Steve

----- Original Message -----
From: "Tom Behler" <[log in to unmask]
To: <[log in to unmask]
Sent: Wednesday, May 09, 2012 20:31
Subject: Re: One Other Thought about the RFI in the Speaker


    Mike:

 I just tried the speaker with batteries, and no speaker cable 
connected at
 all, and still got RFI through the unit when using my amp on 20 
meters at
 about 600 watts.

 So, obviously, the speaker itself is not very RF resistant.

 It's too bad, since it is such a nice-sounding speaker.

 73 from Tom Behler: KB8TYJ

 ----- Original Message -----
 From: "Mike Duke, K5XU" <[log in to unmask]
 To: "Tom Behler" <[log in to unmask]
 Sent: Tuesday, May 08, 2012 8:02 PM
 Subject: One Other Thought about the RFI in the Speaker


 Tom,

 Those were great speakers.  I had one for a number of years 
before
 something in the amplifier died.  I never tried it with any of 
my
 transceivers, so I can't say whether or not mine had a problem 
with
 RFI.

 Have you tried seeing if the RF gets into it with the speaker 
turned
 on, running on battery power, but with no audio cable connected 
to it?

 By removing all external cables, including the audio input, you 
can
 determine whether the RF is coming in on the audio cable or not.

 I suspect it is getting in through the internal wiring of the
 amplifier itself.  In that case, fixing it may be a real trick.  
You may
 need to begin with ferrite beads on the leads between the 
speaker and
 circuit board, and on the leads between the circuit board and 
battery
 holder.

 Just 2 more cents for your knowledge bank.








 Mike Duke, K5XU
 American Council of Blind Radio Amateurs