Rf interference with cmh?

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chronnie49

Well-Known Member

• Jul 31, 2019

• #1

I am about to buy my first 315 cmh and was wondering if anybody has experienced rf interference with a cmh ballast?

I've read that it shouldn't be a problem with most newer digital ballasts but I just wanted to see if anybody had any problems.

 

Renfro

Well-Known Member

• Jul 31, 2019

• #2

It can be an issue. Nanolux even makes filters to help with that issue.

https://growershouse.com/nanolux-rf-filter-set-reduce-rf-interference

https://growershouse.com/revolution-ballast-emi-filter-reduce-rf-emi

You are best with a unit that has the ballast hooked directly to the reflector without a wire (antenna). The direct connection is usually shielded with grounded housing and that prevents the RF emission.

 

Renfro

Well-Known Member

• Jul 31, 2019

• #3

Also a low frequency square wave won't cause RF issues. It's the high frequency ballasts that have the potential to emit significant RF.

 

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chronnie49

Well-Known Member

• Jul 31, 2019

• #4

Renfro said:

It can be an issue. Nanolux even makes filters to help with that issue.

https://growershouse.com/nanolux-rf-filter-set-reduce-rf-interference

https://growershouse.com/revolution-ballast-emi-filter-reduce-rf-emi

You are best with a unit that has the ballast hooked directly to the reflector without a wire (antenna). The direct connection is usually shielded with grounded housing and that prevents the RF emission.

Click to expand...

The ballast I am getting connects to the hood with a very short cable and is low frequency square wave so I guess i should be ok.

 

Renfro

Well-Known Member

• Jul 31, 2019

• #5

Yep you will be good to go on the RF front.