[RFI] Types of flatscreen (Re: Plasma TVs

[Brendan Minish]

On Wed, 2010-11-10 at 11:30 -0600, Peter Laws wrote:
> On Tue, Nov 9, 2010 at 08:33, Jim Miller KG0KP <JimMiller at stl-online.net> wrote:
> > Anybody know if the newer Plasma TVs are as bad for RFI as the early ones
> > were supposed to have been?

Plasma is notoriously bad for RFI. 
>From a consumer point of view it also has a fairly short lifespan at
full brightness and are power hungry 

Some plasmas start off 'not too bad' from an RFI perspective but worsen
with age, perhaps in part because the Display controller chips are
increasing the drive current to compensate for display ageing  

I would certainly avoid plasma like the plague 

> There seem to be three types of flat-screen techonology out there,
> LED, LCD, and Plasma.  Did I miss any?

'LED' TV's use LEDs as the back-light for the LCD display instead of CFL
(florescent tube) lamps, is is more power efficient and some
manufacturers also control the brightness of the LED's to match the
scene on parts of the display which allows for a better contrast ratio
(improved black)   
LED back-lighting should last much longer than CFL back-lights 

I recently bought a Panasonic HD LCD TV with LED back-lighting, the
picture quality is superb, it's a good deal bigger than my old CRT TV,
yet uses 1/3rd of the electricity and I have no RFI issues on any band
from it.    


-- 
73
Brendan EI6IZ