[Hallicrafters] I bet you knew this already.

[Roger (K8RI)]

Jack Dunigan wrote:
> My radio bench has one of those magnifying lights in which I put one 
> of those curly, energy saver bulbs. It is bright, runs cool, and 
> supposedly saves money. When I fire up my Hallicrafters S38-C and turn 
> on the light, a terrible buzz obliterates all signals on the lower 
> half of the broadcast band. From about 900 khz down absolutely nothing 
> gets through. When I switch off the light, the radio works normally. 
> You all probably knew this already, but I was preparing to tear down 
> the radio, replace filters, change tubes, and the like. Glad I 
> switched off the light. Then I discovered that the radio is affected 
> the same way by another lamp in the room maybe 6 or 7 feet away with a 
> tubular quartz bulb and a dimmer switch. Changing the dimmer changes 
> the tone and intensity of the interference.
>  
> Is there an easy way to filter this out? Incandescent lamps in a 
> ceiling fixture seem to have no effect at all.
I have one on the bench with no problems, nor have I ever had any 
interference problems from either CFLs or standard fluorescent lights.  
OTOH I know many who have.  Also, dimmer switches are notorious for 
creating hash.

73

Roger (K8RI)
>  
> Jack
>
>
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