Rf interference to psw12
rfsource
Posts: 3
I have been receiving severe interference (RFI) to my PSW12 from a neighbors amateur radio station. We have been working together to resolve the problem but so far no success. We have even had Industry Canada (the Canadian equivalent to the FCC) come out and measure the field strength. It was measured at about 1.6 Volts/Meter at the sub. Federal regulations state that anything less than 1.83 Volts/meter means it is the receiving equipments fault and not the responsibility of the transmitter owner.
The offending radio station was checked and found to be properley grounded, filtered and running well under the legal power limit.
We have traced the problem to the sub. Disconnecting everything except the AC power cable results in the same interference. In fact even using a little FRS radio in the same room causes interference to the sub.
Tried placing multiple snap on ferrite cores (using both mix31 and Mix43) on the AC line. No success. Tried wrapping the power cord around a few torroids, no success.
Borrowed a sub from the neighbor ( a different brand) and no interference.
Anybody else experienced this? Any suggestions? Don't really want to purchase a new sub as I am happy with this one.
The offending radio station was checked and found to be properley grounded, filtered and running well under the legal power limit.
We have traced the problem to the sub. Disconnecting everything except the AC power cable results in the same interference. In fact even using a little FRS radio in the same room causes interference to the sub.
Tried placing multiple snap on ferrite cores (using both mix31 and Mix43) on the AC line. No success. Tried wrapping the power cord around a few torroids, no success.
Borrowed a sub from the neighbor ( a different brand) and no interference.
Anybody else experienced this? Any suggestions? Don't really want to purchase a new sub as I am happy with this one.
Post edited by rfsource on
Comments
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Is the sub properly grounded to earth ground? Is it a two prong plug, or a three? If its not a three prong plug, You many need to run an earth ground wire back to the ground of the home. Newer homes will have three prong plugs, the round one at the bottom 'should' be tied to earth ground, run a wire from there to the ground of the sub (try heatsink). See if that helps any.
My guess is that something is not wired correctly, and there is a floating ground somewhere, which in turn turns into a huge receiving antenna. -
Yes the power supply only has 2 prongs and there is no earth safety ground. The Polk Engineering folks have let me know they have reproduced this effect in their lab and hopefully will be working on a solution.
I can hardly wait! -
what does rf stand for ?
thanks
-LP -
Aldous_Huxley wrote: »what does rf stand for ?
thanks
-LP
RF = Radio Frequency
RFI = Radio Frequency Interference
