FB - that explains the semi-circular arrow between the two inductors on
the schematic - I wasn't familiar with the notation. I don't know the
whys and wherefores, so I just picked the most elaborate of the several
filters they showed on the catalog page - as I recall, it cost around
$10 plus shipping, so I got two while I was at it.
73, Pete N4ZR
The World Contest Station Database, at www.conteststations.com
The Reverse Beacon Network at http://reversebeacon.net, blog at
reversebeacon.blogspot.com,
spots at telnet.reversebeacon.net, port 7000 and
arcluster.reversebeacon.net, port 7000
On 7/4/2012 3:41 PM, Paul Christensen wrote:
>> According to the schematic on the side, it consists of 2 x 2.5
>> mH indutors, one in series with each leg, a 2200 pF cap shunting the
>> line input and 0.1uF capacitors from each leg to ground on the load
>> side.
> It's generally two inductors wound on a single core for common-mode choking.
> The result is that total common-mode inductance is 2*L while
> differential-mode inductance cancels and equals zero. The 2200pF caps are
> differential-mode shunts to ground. Some of these modules can be purchased
> with complex combinations of both common-mode and differential-mode
> inductance and capacitance sections. I use them for almost all home-brewed
> projects that require an AC supply.
>
> Paul, W9AC
>
>
>
>
> _______________________________________________
> UR RST IS ... ... ..9 QSB QSB - hw? BK
>
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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