[RFI] CFL Bulbs that are OK!

[Don Nelson]

> I'm looking forward to the maturing of LEDs that do not create RFI, give
> a full, or at least pleasing spectrum, and are not expensive.
>
> 73
>
> Roger (K8RI)
>
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OK,

It appears to me that you take a pair of LEDs in parallel where one 
anode is connected to the other's cathode and you put this pair in 
series with a reactance that allows 20ma to flow when 120vac is applied 
to the series circuit. The reactance I calculate is about 6000 ohms 
which is a capacitor of about 0.5 uf in value for a 60 Hertz source. The 
capacitor drops the voltage so that the LED has what it needs in forward 
bias, and one diode will light on one half of the cycle and the other 
will light on the other half of the cycle. Who needs a power supply 
other than the series reactance and 120vac? Noise - what noise? Neither 
diode is forced into avalanche mode and should produce very little noise 
when forward biased.

Don, N0YE