[RFI] Ballast for fluorescent lamp

[Roger (K8RI)]

On 12/24/2012 11:46 AM, Jim Brown wrote:
> On 12/24/2012 8:29 AM, Steve wrote:
>> The big-box stores only carry the electronic ballasts. Wonder if the
>> electronic ballast will cause me problems?
>
> Expect them to be noisy.  Noise is radiated (at least) three ways --
> from the tubes themselves,

I have 11 2 tube, 8' fixtures. They have the big black inductive 
ballasts.  No noise from tubes or wiring.  That's 1650 watts and no 
noise with no shielding.  Purchased them from Lowe's.

However due to our "nanny state" feds I understand the 8 footers may 
soon be made of unobtanium.

I used to buy the full spectrum versions 2 cases at a time and replace 
them all at one time.

73  Roger (K8RI)



  from wiring between the controller and the
> tube(s), and from power wiring. I've seen advice from the EMC community
> that it's possible to shield the fixture with screen wire to kill the
> wiring from the tube, and radiation from power wiring can be killed with
> a good common mode choke, using the measured data of Appendix One of my
> RFI tutorial as winding guidelines.
>
> http://audiosystemsgroup.com/RFI-Ham.pdf
>
> 73, Jim K9YC
> _______________________________________________
> RFI mailing list
> RFI at contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
>
>