I suspect this is the same as the RS 15-1111 AC Line Filter:
http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&product%5Fid=15-1111
For $19.99 I guess I better try one. The ~ $100 units ('NQN and
others) look very good, but the price is too high to hang on every RFI
producing appliance in the house. On the other hand, I could move out
into my garage across the street...
73, Martin AA6E
On 8/2/05, Pete Smith <n4zr@contesting.com> wrote:
> Try this from Radio Shack - you could cascade 3 of them for the ICE price:
>
>
> AC Line filter
> (150-1111A) Specifications Faxback Doc. # 38031
>
> Type: .. AC Line Interference Filter (grounded 3-prong AC plug and outlet)
>
> Freq.Range Attenuation
>
> 0 ~ 1k 0 dB
> 1k ~ 10k 0 dB
> 10k ~ 70k 10 dB
> 70k ~ 100k 40 dB
> 100k ~ 10M 40 dB
>
> Specifications are typical; individual units might vary. Specifications are
> subject to change and improvement without notice."
>
>
> At 02:35 PM 8/2/2005, dgsvetan@rockwellcollins.com wrote:
> >Martin,
> >
> >There are two problems: limited market (how many potential customers exist
> >for the type of filter you seek), and varied applications.
> >
> >Some victims of RFI can do very well with the standard available filters
> >from CorCom and others, as described by N8SS in another posting. Take a
> >good look at the specs on those filters; some will actually have a fair
> >amount of attenuation in all or part of the HF region, others just begin
> >attenuation at or near 30 MHz. Power filters with "serious" attenuation
> >below 30 MHz require more core material and larger values of by-pass caps
> >than those intended for 30 MHz and above applications. So, there is a
> >premium to pay for parts.
> >
> >Those who find the "good" ones at hamfests should count themselves lucky.
> >Having worked for more than a decade at a company that made power line
> >filters as one of its (industrial and government) product lines, I can tell
> >you that the ICE filters are a very good bargain, indeed.
> >
> >As for the surge supressors with filters, I can't say that any of those do
> >any good as filters at my QTH. However, a ham friend of mine in the
> >northwest part of Iowa took a direct lightning strike to his tower and
> >antenna system last month. All of his coaxial line and AC power line surge
> >supressors were destroyed, but his gear survived. So, buy them as surge
> >supressors and take the "filtering" with a bit of salt. If you check out
> >the specs on those power strips that include a filter, the filters are
> >intended primarily for the above 30 MHz region.
> >
> >For these special applications, the choice is pretty much either pay the
> >premium price for serious filters (unless you get lucky at a hamfest or on
> >e-bay), or get good at homebrewing.
> >
> >73, Dale
> >WA9ENA
> >
> >
> >
> >
> >
> > "Martin, AA6E"
> > <martin.ewing@gma
> > il.com> To
> > Sent by: rfi@contesting.com
> > rfi-bounces@conte cc
> > sting.com
> > Subject
> > [RFI] source for RFI filter
> > 08/02/2005 10:49 cordset?
> > AM
> >
> >
> > Please respond to
> > "Martin, AA6E"
> > <martin.ewing@gma
> > il.com>
> >
> >
> >
> >
> >
> >
> >Hello All,
> >
> >I am tired of making improvised AC line filters by winding power cords
> >through ferrite cores for 6 or 8 turns. They work ok, but they are
> >unsightly and oversized, especially if you have a 3-wire cord.
> >
> >This should be a commercial product, don't you think? I've searched
> >and haven't found one. There are good RFI filters for IEC power
> >outlets and wired-in situations (e.g.
> >http://www.corcom.com/Series/IEC/EASEBS/ ), but I want one that is
> >compact and integrated with a cordset, so you just plug it in series
> >with your equipment's AC cord. Even simpler: a box with the std
> >recessed IEC male with filter on one side and a 3-wire female outlet
> >on the other. (I doubt that any of the premium "surge suppressors"
> >offer EMC filtering. Does anyone know to the contrary?)
> >
> >Yes, a box would be easy to make, but I want ready-made. It's the
> >sort of thing that would cost you $12.95 at the hardware store if it
> >were produced in volume. ICE has a box for $70+, but it is bulky and
> >too expensive for my application.
> >
> >I'm thinking mainly of RFI egress (from consumer products to my
> >equipment), but this product would serve for ingress protection also.
> >
> >Thanks for any pointers. Yes, I asked about this last year, but
> >nothing came of it.
> >
> >73 Martin AA6E
> >--
> >martin.ewing@gmail.com
> >http://blog.aa6e.net
> >_______________________________________________
> >RFI mailing list
> >RFI@contesting.com
> >http://lists.contesting.com/mailman/listinfo/rfi
> >
> >
> >_______________________________________________
> >RFI mailing list
> >RFI@contesting.com
> >http://lists.contesting.com/mailman/listinfo/rfi
>
>
--
martin.ewing@gmail.com
http://blog.aa6e.net
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