The PHILCO Phorum

Speaking of FCC part 15 subpart B conformance for Unintentional Radiators.

Hey Mike,
I've got a similar issue w/my fairly new refrigerator. When the compressor kicks on the line noise triples. Very annoying!!! At first I thought it was a switch mode p/s some where in the house but tracked it to the fridge. Haven't tried to fix it yet but is on my long to do list.

Terry

It is strange, the asynchronous motors are not known to be big offenders.
You could try to buy/build a large enough filter and plug through it.
You could start with a few microfarads of capacitance in parallel to the lines. I doubt Y-caps would do much, the noise is likely the differential one.

So if I hook this puppy across the line all the noise will go away, neighbors will thank me for cleaning the line for blocks and blocks???

or

Will I be cursed for years for make the hood go black??

Don't know how many nf it is but it's 12mfd @ 3500v np.

The hood won't go black as 12uF is not that much of a capacitance and is an equivalent of 220 Ohms load except it is purely capacitive, and the current itself will be 1/2 A.
And this is one of those cases where "the size doesn't matter"

(12-28-2016, 04:44 PM)morzh Wrote: [ -> ]The hood won't go black as 12uF is not that much of a capacitance and is an equivalent of 220 Ohms load except it is purely capacitive, and the current itself will be 1/2 A.
And this is one of those cases where "the size doesn't matter"

So abt 50wts.
Do thing improve if I add a few hnys in series with the cap?? I may have a 5 or 600 ma choke around.

I don't see why unless you are having problems. Yes LC filters are good if used correctly. Henries? Depends what noise it is.