[SGVLUG] Off-Topic: An RF Choke for AM Broadcast Band?

[Dan Kegel via SGVLUG]

And one way to address it there... is to put chokes on *those* power lines,
once you find the noisy ones.
- Dan

On Fri, Jan 3, 2020 at 8:04 PM Todd Beason via SGVLUG <sgvlug at sgvlug.net>
wrote:

> If the noise is coming in through power cords or other cabling then you
> need Mix 77 ferrites like these:
>
>
>
> https://palomar-engineers.com/rfi-kits/am-broadcast-rfi-kits/
>
>
>
> If it is RF interference coming in over the antenna then you will need to
> find the source and address it there.  Solar panels, grow lights, cheap
> power supplies, and anything that uses pulse width modulation for control
> can cause interference.
>
> -----Original message-----
> *From:* Chime Hart via SGVLUG
> *Sent:* Friday, January 3 2020, 6:04 pm
> *To:* San Gabriel Valley LUG
> *Subject:* [SGVLUG] Off-Topic: An RF Choke for AM Broadcast Band?
>
>
> I realize this is rather off topic, however, with an amount of
> Hams-and-engineers we have on this list, I want to explain exactly what I am
> looking for.
> Around 4years ago the AM reception in this section of our condo complex became
> rather noisy, however, walking around 90degrees on the balcony, the noise is
> gone, but its not like I can hang a wire out there. HOA would have a fit. So I
> remember there were rf chokes you could put between the antenna
> terminals-and-the radio--and-it would filter out noise. In checking with HRO,
> they didn't have anything other than for short-wave. Because of this noise, its
> hard to receive AM HD signals consistantly. Other than an informative
> discussion, if folks didn't want to clutter up the list, you can write directly.
> Thanks so much in advance. Board members here will not trouble shoot the noise,
> even if its servalance equipment in an ellavator.
> I suppose a spectrim analizer would find the noise, but I certainly don't own
> one.
> Thanks so much in advance for any guidance
> Chime
> Sherman Oaks
>
>
>
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