John,
Here's some hopefully useful info
from my research and last buy I did
You may get away with using 31 MIX as it seems to cover freq ranges
of 77 and 43 mix in most cases and K9YC has a good inof paper he wrote
to help u select MIX...contact Jim at
jim@audiosystemsgroup.com
Here's some good sources and info I may have sent before but good to pass
on.
Also, since my last order of Quantities 100 pieces of F240-31 ( 2.4 inch
Donuts, 31 Mix )
I was informed that the $3 to $4 amortized price ( including any shipping
and tax if any )
would be going up quite a bit due to price of Nickel going up!
I have not ordered since and hope I have enough to last a while
I Have NO pecuniary interest in this matter
BTW, I had nothing but trouble ordering from Lodestone and 1 shipment of 100
2.4" 31 Mix donuts
was shattered when one of the deliveries guys dropped the box which was not
packed properly
If you do a group order, be sure to tell the vender that 31 mix is VERY
Brittle and will shatter
if box is dropped and nor packed with some cushening !!! ( They destroyed
almost half of the 2.4 inch 31 mix donuts ! )
73, Dennis N6KI
Sandy Eggo
see below info and maybe pass on to others
I was in the process of making a group buy for our local radio club
of some -31 Mix Ferrite clamp on beads
that will fit tightly on RG-213 size coax and also be good for smaller
cables that I could
thread thru several times for efficacy. ( Hole is approx 0.400" )
I discovered that Mouser Electronics now sells at least this one
particular -31 Mix Ferrite
bead that works well for RFI problems per Jim Brown's recommendations in the
past
on this reflector. ( These do well in place of 43 or 77 mix and I now use
this
mix from 160 thru 6 mtr band to resolve RFI probs with good results )
They are $2.70 in small quantity but drop to $1.70 for 100 pieces, so
get together with
a few buddies or your local contest or DX club and snap up the discount !
You can get to Mouser's order page by typing
0431167281
in Google search and it will be the first hit you get
or go to www.mouser.com and enter part number 623-0431167281
Mouser
Part # Mfr.'s
Part # Manufacturer
Description
Your Part# Order
Qty. Availability* Price Ext. 623-0431167281 0431167281
Fair-Rite FERRITE SNAP CASE - RoHS: COMPLIANT
*NOTE: Important !*
I found one anomaly with these and that is that if you do use them to snap
directly onto
RG-213 type coax ( approx 0.400" Diameter) or coax with the same diameter,
the plastic shell that comes
with the bead has a slightly* smaller *diameter than the hole in the ferrite
bead itself and will not allow
you to clamp the bead onto the coax until you take a pair of diagonal
cutters and trim the
plastic making the hole bigger. Just a nuisance for now as I have alerted
Mouser and Fair-rite
and hopefully they will use the correct plastic shell in the future.
------------------------------
*
2.4 inch Donuts *
If you would like to buy 2.4" Round ( Donut ) type, ( Fair-Rite
P/N *2631803802
)
*and these are really great for really tough RFI problems, you can order
them from Dexter Magnetic Technologies
I am not sure what their minimum order is but when I do my group buys
of 100 pieces
I have gotten a piece cost down near $3, though I hear the price will be
rising sharply soon
due to the price of one of the materials use in making the -31 MIX - ( like
going to $4.28 ea in 100 Qty ! )
DEXTER MAGNETIC TECHNOLOGIES <http://www.dextermag.com/>
800/775-3829
or go to www.fair-rite.com
click on PRODUCTS ( First Pull Down Tab)
then click on DISTRIBUTER STOCK LOOKUP
Then enter the part number *2631803802 ( 2.4 inch Donut -31 Mix )
*and something like this info below will come up shopping who has stock.
2631803802 160 11/26/2006 Amidon Inductive Components
<http://www.amidoncorp.com/> 800/898-1883
714/850-1163
Email<http://www.mectronic.com/scripts/mfgsendmail.asp?val=yes&NAD__ID=11752&mfgID=4605&companyemail=sales%40amidoncorp%2Ecom&companyname=Amidon+Inductive+Components&PartNo=2631803802>
RFQ<http://www.mectronic.com/scripts/mfgrfq.asp?val=yes&NAD__ID=11752&mfgID=4605&companyemail=sales%40amidoncorp%2Ecom&companyname=Amidon+Inductive+Components&PartNo=2631803802&txtUserID=&mfgname=Fair%2DRite+Products+Corp%2E>
PO<https://www.mectronic.com/scripts/mfgpoform.asp?val=yes&NAD__ID=11752&mfgID=4605&companyemail=sales%40amidoncorp%2Ecom&companyname=Amidon+Inductive+Components&PartNo=2631803802&txtUserID=&mfgname=Fair%2DRite+Products+Corp%2E>
2631803802
305 11/24/2006 Kreger Components, Inc
<http://www.kregercomponents.com/> 800/609-8186
540/776-7890
Email<http://www.mectronic.com/scripts/mfgsendmail.asp?val=yes&NAD__ID=14120&mfgID=4605&companyemail=ferrites%40kregercomponents%2Ecom&companyname=Kreger+Components%2C+Inc&PartNo=2631803802>
RFQ<http://www.mectronic.com/scripts/mfgrfq.asp?val=yes&NAD__ID=14120&mfgID=4605&companyemail=ferrites%40kregercomponents%2Ecom&companyname=Kreger+Components%2C+Inc&PartNo=2631803802&txtUserID=&mfgname=FAIR%2DRITE+PRODUCTS>
PO<https://www.mectronic.com/scripts/mfgpoform.asp?val=yes&NAD__ID=14120&mfgID=4605&companyemail=ferrites%40kregercomponents%2Ecom&companyname=Kreger+Components%2C+Inc&PartNo=2631803802&txtUserID=&mfgname=FAIR%2DRITE+PRODUCTS>
2631803802
211 11/20/2006 DEXTER MAGNETIC TECHNOLOGIES
<http://www.dextermag.com/> 800/775-3829
On Sat, Oct 4, 2008 at 8:34 AM, W9RPM <john@w9rpm.com> wrote:
> Hi , What is a good source for the Mix 77 Snap-on Ferrites? Thanks- John
> W9RPM
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