Hi all,
I followed the advice about the advantage of the larger cores and ordered a
few those and a few of these: 0431176451. They came in today and the latter
ones are *huge* and heavy; I was shocked when I open the parcel from UPS
(Mouser sure packs them well). But hopefully they will come in
The ad says 44 43 materiel. Going by the P/N it looks like #43 ferrite.
Russ,
N3CO
- Original Message -
From: Jim Sheldon w...@cox.net
To: ab2tc ab...@arrl.net; elecraft@mailman.qth.net
Sent: Wednesday, January 19, 2011 11:21 AM
Subject: Re: [Elecraft] OT: Big Ferrite Split Beads
AM
Subject: Re: [Elecraft] OT: Big Ferrite Split Beads @ B.G. Micro
They didn't list the material type in the ad, so no, I don't. I suspect
they are surplus from a computer power supply manufacturer as they are
about the same size as those used around the output leads of many
I'd like to follow up on K2AV's excellent recent post.
Thanks to K9AY's previous work, I also was turned on to the type 31 material
for RF suppression at HF. I have found it to be substantially better than
type 43, especially on the lower bands and for broadband use.
A hint for those of you who
On 1/19/2011 8:21 AM, Jim Sheldon wrote:
I've had several queries on this so I'm posting here - I have no idea what
ferrite material is
It makes no sense to buy unknown ferrite cores, especially for use on
the HF bands. Study my tutorial on RFI to understand why.
On 1/20/2011 11:34 AM, Craig D. Smith wrote:
A hint for those of you who are contemplating placing an order for some of
the clamp-ons: The smaller diameter clamp-ons look attractive at first
glance due to their low prices and ability to fit most of the small cables
in your shack. But
Anyone needing those big ferrite, snap together, split beads for reducing RFI
on cables, B.G. Micro has them in stock at a pretty good price. $1.43 each
plus shipping.
Jim - W0EB
http://www.bgmicro.com/COL1066.aspx
__
Elecraft
Any idea what the ferrite material is?
AB2TC - Knut
Jim Sheldon-2 wrote:
Anyone needing those big ferrite, snap together, split beads for reducing
RFI on cables, B.G. Micro has them in stock at a pretty good price.
$1.43 each plus shipping.
Jim - W0EB
snip
--
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They didn't list the material type in the ad, so no, I don't. I suspect they
are surplus from a computer power supply manufacturer as they are about the
same size as those used around the output leads of many of the switching
supplies used in computers.
I've had several queries on this so I'm
For the record, Mouser has a similar snap-on ferrite in the preferred (for
HF) #31 material here:
http://www.mouser.com/ProductDetail/Fair-Rite/0431167281/?qs=KmHvPbTOE4S79xB57hcPyQ%3d%3d
The part number is 623-0431167281. The hole is about 0.4. A smaller version
is this part# 623-0431164281
Here is another useful link:
http://www.mouser.com/catalog/catalogUSD/642/952.pdf
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ab2tc wrote:
I used 4 of them to bring down the noise on the Ethernet cable from my
Dell computer.
Did you use 4 in series or 4 on different cables?
Leigh/WA5ZNU
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In series on one cable. It took that many to bring the spurs (fairly clean
carriers every 61kHz, peaking in the 15m band) down to the antenna noise
level on that band.
AB2TC - Knut
Leigh L. Klotz Jr WA5ZNU wrote:
ab2tc wrote:
I used 4 of them to bring down the noise on the Ethernet
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