Re: Aquatic Plants Digest V2 #414

> From: RicCooney at aol_com
> Date: Sat, 28 Dec 1996 21:01:06 -0500
> Subject: Re: ballast interference
> In a message dated 12/28/96 1:25:40 AM, you wrote:
> >I've never had any problems with them generating any type
> >of interference, when working properly.
> When it comes to Electro/Magnetic Interference it helps to remind ourselves
> that EMI requires both a transmitter and a receiver.
> Probably the worst offender when it comes to unwanted EMI is the heater,
> regardless of mfg.  The reason that it does not  offend as much as they used
> to is due to filtering supplied to the recievers by their manufactures .
> If a ballast is transmitting RF waves it is usually easy to filter out if
> hipass and lowpass filters are attached to the ballast ground and to the TV
> or stereo . These can easily be purchased at a local Radio Shack.
> Ric Cooney, N3BRB
> Mailto:RicCooney at aol_com

At the suggestion of another person, I tried a filter on the tv with no
noticeable effect.  Perhaps your suggestion of putting one on the
ballast as well is the answer.  This EMI and RF stuff is beyond me.
Bob Hoffman
Huntington Beach Orchids