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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
http://users.deltanet.com/users/bhoffman/hborchid.htm