The Murphy Builders Site

Posted: **Fri Feb 17, 2012 10:34 pm**

Just wondering if someone can point me to a cheap but
effective noise filter for my main alternator output
power lead. My previous one was from Radio Shack, that
I bought about 5 years or so ago and worked really well
until just recently. Unfortunately, they don't sell it
anymore out here, and I have not been able to find an
equivalent. The old one is shaped like a small
cylinder, 1 1/2 inches long, and about 3/4 inch
diameter. It has little studs on each end to attach the
input and output wires.

I tried running without it, but I then get noise in my
headsets, so I definitely need it.

Any help or pointers would be appreciated. Thanks.

Walter

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Posted: **Fri Feb 17, 2012 10:34 pm**

Hey Walter,

Certainly the same or similar capacitors should be available at what I
would phrase as "commercial car parts supply house". Or at the local
aviation repair or av-electronics places. Or marine dealers. Or you
might even try Radio Shack Parts. Here's a start on the Canadian
on-line site.

<http://www.radioshack.ca/estore/categor ... ioShack>On

Take care.

Brian Lawson,
Windsor, Ontario.
XXXXXXXXXXXXXXXXXXXXXXXXX
Sat, 23 Nov 2002 18:33:36 -0800, you wrote:

Just wondering if someone can point me to a cheap but
effective noise filter for my main alternator output
power lead. My previous one was from Radio Shack, that
I bought about 5 years or so ago and worked really well
until just recently. Unfortunately, they don't sell it
anymore out here, and I have not been able to find an
equivalent. The old one is shaped like a small
cylinder, 1 1/2 inches long, and about 3/4 inch
diameter. It has little studs on each end to attach the
input and output wires.

I tried running without it, but I then get noise in my
headsets, so I definitely need it.

Any help or pointers would be appreciated. Thanks.

Walter

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Posted: **Fri Feb 17, 2012 10:34 pm**

Walter, I assume this is the one you are talking about, found by searching
filters on Radio Shacks site. Looks like it has + and - in and outs!?!? It
is not in the capacitor section but in the audio section. According to the
listing it is not longer available from vendor BUT the Radio Shack's "find
it in a store" search shows that it is in stock in both the Chilliwack
stores. Also in stock in Langley, Kellona Vancouver etc and just about every
store in Ontario. Call the stores direct and see before you bother driving.
............................................................................
.....................................
10A NOISE FILTER 270-51 $22.99

Reduces noise interference through power lead.

Currently not available from vendor. To check for availability in our
stores, please click the 'Find it in-store' for up-to-date stock
information.
............................................................................
......................................
Cheers,
Wayne

----- Original Message -----
From: "Walter Klatt" <walter.klatt@shaw.ca>
To: <murphy-rebel@dcsol.com>
Sent: Saturday, November 23, 2002 9:33 PM
Subject: Noise filter for alternator power lead

Just wondering if someone can point me to a cheap but
effective noise filter for my main alternator output
power lead. My previous one was from Radio Shack, that
I bought about 5 years or so ago and worked really well
until just recently. Unfortunately, they don't sell it
anymore out here, and I have not been able to find an
equivalent. The old one is shaped like a small
cylinder, 1 1/2 inches long, and about 3/4 inch
diameter. It has little studs on each end to attach the
input and output wires.

I tried running without it, but I then get noise in my
headsets, so I definitely need it.

Any help or pointers would be appreciated. Thanks.

Walter

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Posted: **Fri Feb 17, 2012 10:34 pm**

If memory serves me well you can get similar devices at auto repair supply stories... Autozone, etc.

Rick Muller
SR70

-----Original Message-----
From: Walter Klatt [SMTP:walter.klatt@shaw.ca]
Sent: Saturday, November 23, 2002 7:34 PM
To: murphy-rebel@dcsol.com
Subject: Noise filter for alternator power lead

Just wondering if someone can point me to a cheap but
effective noise filter for my main alternator output
power lead. My previous one was from Radio Shack, that
I bought about 5 years or so ago and worked really well
until just recently. Unfortunately, they don't sell it
anymore out here, and I have not been able to find an
equivalent. The old one is shaped like a small
cylinder, 1 1/2 inches long, and about 3/4 inch
diameter. It has little studs on each end to attach the
input and output wires.

I tried running without it, but I then get noise in my
headsets, so I definitely need it.

Any help or pointers would be appreciated. Thanks.

Walter

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Posted: **Fri Feb 17, 2012 10:34 pm**

Thanks Wayne and Brian. Doesn't Radio Shack have a
great site for finding stuff! However, I am still ahead
of you guys and actually looked at that 270-51 product
in a couple of their stores here yesterday. It might
work, but is not the same as my old one. It is much
larger and heavier, and would be more of a challenge to
attach at my alternator location. They also had a
square unit, which I didn't see on the website, that
could handle more amps, but again is larger. I also saw
a couple of possibilities at Canadian Tire, but again
nothing small and light. The most promising one I saw
was in a catalogue at an auto parts store. They didn't
have it in stock, but could order it. It was a
Bluestreak RC13 for 20 bucks.

Anyway, I appreciate the help. I wasn't sure what other
people were using, and didn't want to miss looking at
other alternatives. Thanks again.

Walter

-----Original Message-----
From: mike.davis@dcsol.com
[mailto:mike.davis@dcsol.com]On Behalf Of
Wayne G. O'Shea
Sent: Saturday, November 23, 2002 9:54 PM
To: murphy-rebel@dcsol.com
Subject: Re: Noise filter for alternator power lead

Walter, I assume this is the one you are
talking about, found by searching
filters on Radio Shacks site. Looks like it
has + and - in and outs!?!? It
is not in the capacitor section but in the
audio section. According to the
listing it is not longer available from
vendor BUT the Radio Shack's "find
it in a store" search shows that it is in
stock in both the Chilliwack
stores. Also in stock in Langley, Kellona
Vancouver etc and just about every
store in Ontario. Call the stores direct and
see before you bother driving.
.............................................
...............................
.....................................
10A NOISE FILTER 270-51 $22.99

Reduces noise interference through power lead.

Currently not available from vendor. To
check for availability in our
stores, please click the 'Find it in-store'
for up-to-date stock
information.
.............................................
...............................
......................................
Cheers,
Wayne

----- Original Message -----
From: "Walter Klatt" <walter.klatt@shaw.ca>
To: <murphy-rebel@dcsol.com>
Sent: Saturday, November 23, 2002 9:33 PM
Subject: Noise filter for alternator power lead

Just wondering if someone can point me to
a cheap but
effective noise filter for my main
alternator output
power lead. My previous one was from Radio
Shack, that
I bought about 5 years or so ago and
worked really well
until just recently. Unfortunately, they
don't sell it
anymore out here, and I have not been able
to find an
equivalent. The old one is shaped like a small
cylinder, 1 1/2 inches long, and about 3/4 inch
diameter. It has little studs on each end
to attach the
input and output wires.

I tried running without it, but I then get
noise in my
headsets, so I definitely need it.

Any help or pointers would be appreciated. Thanks.

Walter

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Posted: **Fri Feb 17, 2012 10:34 pm**

Hi Walter
It's been suggested to me that a noise filter works better if attached
near the radio. I haven't gotten around to trying it yet but I've got one
of the big rat shack units sitting on the shelf waiting.
Drew

At 07:23 AM 11/24/2002 -0800, you wrote:

Thanks Wayne and Brian. Doesn't Radio Shack have a
great site for finding stuff! However, I am still ahead
of you guys and actually looked at that 270-51 product
in a couple of their stores here yesterday. It might
work, but is not the same as my old one. It is much
larger and heavier, and would be more of a challenge to
attach at my alternator location. They also had a
square unit, which I didn't see on the website, that
could handle more amps, but again is larger. I also saw
a couple of possibilities at Canadian Tire, but again
nothing small and light. The most promising one I saw
was in a catalogue at an auto parts store. They didn't
have it in stock, but could order it. It was a
Bluestreak RC13 for 20 bucks.

Anyway, I appreciate the help. I wasn't sure what other
people were using, and didn't want to miss looking at
other alternatives. Thanks again.

Walter

-----Original Message-----
From: mike.davis@dcsol.com
[mailto:mike.davis@dcsol.com]On Behalf Of
Wayne G. O'Shea
Sent: Saturday, November 23, 2002 9:54 PM
To: murphy-rebel@dcsol.com
Subject: Re: Noise filter for alternator power lead

Walter, I assume this is the one you are
talking about, found by searching
filters on Radio Shacks site. Looks like it
has + and - in and outs!?!? It
is not in the capacitor section but in the
audio section. According to the
listing it is not longer available from
vendor BUT the Radio Shack's "find
it in a store" search shows that it is in
stock in both the Chilliwack
stores. Also in stock in Langley, Kellona
Vancouver etc and just about every
store in Ontario. Call the stores direct and
see before you bother driving.
.............................................
...............................
.....................................
10A NOISE FILTER 270-51 $22.99

Reduces noise interference through power lead.

Currently not available from vendor. To
check for availability in our
stores, please click the 'Find it in-store'
for up-to-date stock
information.
.............................................
...............................
......................................
Cheers,
Wayne

----- Original Message -----
From: "Walter Klatt" <walter.klatt@shaw.ca>
To: <murphy-rebel@dcsol.com>
Sent: Saturday, November 23, 2002 9:33 PM
Subject: Noise filter for alternator power lead

Just wondering if someone can point me to
a cheap but
effective noise filter for my main
alternator output
power lead. My previous one was from Radio
Shack, that
I bought about 5 years or so ago and
worked really well
until just recently. Unfortunately, they
don't sell it
anymore out here, and I have not been able
to find an
equivalent. The old one is shaped like a small
cylinder, 1 1/2 inches long, and about 3/4 inch
diameter. It has little studs on each end
to attach the
input and output wires.

I tried running without it, but I then get
noise in my
headsets, so I definitely need it.

Any help or pointers would be appreciated. Thanks.

Walter

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To contact the list admin, e-mail
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Posted: **Fri Feb 17, 2012 10:34 pm**

Drew, you may be right about attaching it closer to the
radio. However, at the time I bought the previous noise
filter, the instructions recommended putting it as
close as possible to the source, so that is how it
ended up by the alternator. Yesterday, I did go out and
buy another one, at Walmart of all places for 11.97,
and mounted it back on the plane. It seemed to do the
trick again. It is the smallest one I found so far, but
is rated for only 10 amps, so not sure how long it will
last.

Meanwhile, I did find the original package material
from Radio Shack. It is called a Capacitor Noise Filter
under the old Archer brand. It is rated at 40 amps. The
part number is 272-1085. So if anyone knows of any old
Radio Shack inventory with the part, I would still be
interested in getting my hands on a couple. Or if there
is an equivalent out there somewhere else.

Walter

-----Original Message-----
From: mike.davis@dcsol.com
[mailto:mike.davis@dcsol.com]On Behalf Of
Drew Dalgleish
Sent: Monday, November 25, 2002 6:16 AM
To: murphy-rebel@dcsol.com
Subject: RE: Noise filter for alternator power lead

Hi Walter
It's been suggested to me that a noise
filter works better if attached
near the radio. I haven't gotten around to
trying it yet but I've got one
of the big rat shack units sitting on the
shelf waiting.
Drew

At 07:23 AM 11/24/2002 -0800, you wrote:
Thanks Wayne and Brian. Doesn't Radio Shack have a
great site for finding stuff! However, I am
still ahead
of you guys and actually looked at that
270-51 product
in a couple of their stores here yesterday. It might
work, but is not the same as my old one. It is much
larger and heavier, and would be more of a
challenge to
attach at my alternator location. They also had a
square unit, which I didn't see on the website, that
could handle more amps, but again is
larger. I also saw
a couple of possibilities at Canadian Tire,
but again
nothing small and light. The most promising
one I saw
was in a catalogue at an auto parts store.
They didn't
have it in stock, but could order it. It was a
Bluestreak RC13 for 20 bucks.

Anyway, I appreciate the help. I wasn't
sure what other
people were using, and didn't want to miss
looking at
other alternatives. Thanks again.

Walter

-----Original Message-----
From: mike.davis@dcsol.com
[mailto:mike.davis@dcsol.com]On Behalf Of
Wayne G. O'Shea
Sent: Saturday, November 23, 2002 9:54 PM
To: murphy-rebel@dcsol.com
Subject: Re: Noise filter for alternator
power lead

Walter, I assume this is the one you are
talking about, found by searching
filters on Radio Shacks site. Looks like it
has + and - in and outs!?!? It
is not in the capacitor section but in the
audio section. According to the
listing it is not longer available from
vendor BUT the Radio Shack's "find
it in a store" search shows that it is in
stock in both the Chilliwack
stores. Also in stock in Langley, Kellona
Vancouver etc and just about every
store in Ontario. Call the stores direct and
see before you bother driving.
.............................................
...............................
.....................................
10A NOISE FILTER 270-51 $22.99

Reduces noise interference through power lead.

Currently not available from vendor. To
check for availability in our
stores, please click the 'Find it in-store'
for up-to-date stock
information.
.............................................
...............................
......................................
Cheers,
Wayne

----- Original Message -----
From: "Walter Klatt" <walter.klatt@shaw.ca>
To: <murphy-rebel@dcsol.com>
Sent: Saturday, November 23, 2002 9:33 PM
Subject: Noise filter for alternator power lead

a cheap but alternator output Shack, that worked really well don't sell it to find an to attach the noise in my
appreciated. Thanks.
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