Price survey on ferrite toroids and clamp-ons for ham RFI applications
Gary NA6O. Updated July 2025.
Reference: Fair-Rite catalog https://fair-rite.com/ Sadly they don't seem to
have their old PDF catalog for download. Email me for a fairly recent copy.
Showing only suppliers with websites that list inventory and allow online
ordering. When ordering 2.4-inch toroids, order in multiples of 10, then most
suppliers will pack them in original factory-molded foam sheets. Listed in
order of decreasing price, quantity 1.
Tarriff note: As of July 2025 you may see an extra tarriff charge at checkout.
For instance, it was about 12% on one particular item at Arrow.
------------
Call these two companies for quotes. Prices in larger quantities often beat
anything listed here.
http://www.dextermag.com/
http://www.lodestonepacific.com/
(If you really want to be ripped off, shop at Amidon, Palomar Engineers, or DX
Engineering)
------------
************************************************************
Toroid, 2.4" (61 mm) OD, #31, Fair-Rite 2631803802
This is your #1 most-valuable RFI mitigation device. Buy LOTS of them.
************************************************************
https://www.arrow.com/en/products/2631803802/fair-rite-products
7-16-25 in stock
1: $3.63
10: $3.14
25: $2.78
100: $2.76
https://proaudioeng.com/fair-rite-ferrites/
7-16-25 in stock
1: $7.00
4: $6.75
10: $6.50
https://www.mouser.com
7-16-25 in stock
1: $7.95
10: $5.47
20: $4.74
http://www.newark.com/
7-16-25 small stock
1: $9.90
10: $7.33
25: $6.45
50: $6.13
http://www.kf7p.com/KF7P/Ferrite_chokes.html
7-16-25 in stock
1: $9.95
10: $8.45
http://palomar-engineers.com/ferrite-products/ferrite-cores
7-16-25 in stock
1: $9.99
10: $8.99
100: $7.95
http://www.kitsandparts.com/toroids.php
7-16-25 in stock, shipping: flat rate box, about $10
1: $11.00
10: $9.50
http://www.amidoncorp.com/ft-240-31/
7-16-25 in stock
1: $11.00
https://www.dxengineering.com/parts/dxe-tc31-24-4
7-16-25 in stock
4: $15.75
************************************************************
"Biggest clamp on" Fair-Rite #31 p/n 0431177081
Page 83 of pdf catalog #17. 1" bore, 1.7" long
Equivalent to about 3 toroids.
************************************************************
https://www.arrow.com/en/products/0431177081/fair-rite-products
7-16-25 in stock
9: $8.16
25: $7.52
100: $7.45
http://www.mouser.com
7-16-25 in stock
1: $13.98
10: $10.15
36: $8.77
https://proaudioeng.com/fair-rite-ferrites/
7-16-25 in stock
1: $15.25
10: $14.88
25: $14.41
http://www.newark.com/ 54H0362
7-16-25 small stock
1: $17.21
10: $15.72
25: $12.46
https://palomar-engineers.com/ferrite-products/ferrite-cores/Snap-On-Mix-31-RFI-Range-1-300-MHz-c21480229
7-16-25 in stock
1: $19.50
3: $16.65
10: $16.95
36: $15.27
http://www.kf7p.com/KF7P/Ferrite_chokes.html
7-16-25 in stock
1: $21.95
10: $18.65
https://www.dxengineering.com/parts/dxe-csb31-10-1
7-16-25 in stock
1: $34.99
************************************************************
Extra-Large Toroid, Fair-Rite #31 2631814002
4-inch OD, 3-inch ID
Good for large power cords, often with the plug installed.
************************************************************
https://www.arrow.com/en/products/2631814002/fair-rite-products
7-16-25 in stock
1: $23.73
10: $16.56
https://proaudioeng.com/fair-rite-ferrites/
7-16-25 in stock
1: $26.25
4: $24.60
http://www.mouser.com
7-16-25 in stock
1: $27.67
10: $17.91
25: $17.65
http://www.kf7p.com/KF7P/Ferrite_chokes.html
7-16-25 in stock
1: $28.95
http://palomar-engineers.com/ferrite-products/ferrite-cores
7-16-25 in stock
1: $39.95
https://www.amidoncorp.com/ft-400-31/
7-16-25 in stock
1: $44.50
https://www.dxengineering.com/parts/dxe-tc31-40-1
7-16-25 in stock
1: $61.99
http://www.newark.com/ 01P1090
7-16-25 out of stock
50: $27.19
************************************************************
Toroid, 2.4" (61 mm) OD, #43, Fair-Rite 2643803802
Note: Mix 31 is generally preferred over this.
************************************************************
https://www.arrow.com/en/products/2643803802/fair-rite-products
7-16-25 in stock
1: $5.10
10: $3.90
25: $3.50
http://www.mouser.com
7-16-25 in stock
1: $6.42
10: $5.41
20: $4.74
50: $3.97
http://www.newark.com/ 14N5458
7-16-25 in stock
1: $7.60
10: $7.30
25: $6.53
50: $6.17
http://palomar-engineers.com/ferrite-products/ferrite-cores
7-16-25 in stock
1: $8.95
10: $8.00
100: $7.95
http://www.kitsandparts.com/toroids.php
7-16-25 in stock, shipping: flat rate box, about $10
1: $9.00
10: $8.50
http://www.kf7p.com/KF7P/Ferrite_chokes.html
7-26-25 in stock
1: $9.95
10: $8.45
http://www.amidoncorp.com/ft-240-43/
7-16-25
1: $11.00
************************************************************
Toroid, 1.4" (36 mm) OD, #43, Fair-Rite 2643802702
Great for small wires like wall-warts
************************************************************
https://www.arrow.com/en/products/2643802702/fair-rite-products?q=2643802702
7-16-25 in stock
1: $2.05
10: $1.41
50: $1.06
100: $0.93
http://www.mouser.com
7-16-25 in stock
1: $2.14
10: $1.48
25: $1.27
50: $1.12
http://www.newark.com/ 06C1035
7-16-25 in stock
1: $2.62
10: $2.00
25: $1.71
50: $1.56
http://palomar-engineers.com/ferrite-products/ferrite-cores
7-16-25 in stock
1: $3.89
10: $3.50
100: $2.99
http://www.kitsandparts.com/toroids.php
7-16-25 in stock, shipping: flat rate box, about $10
2: $6.00
30: $2.50
************************************************************
Toroid, 1.14" (29 mm) OD, #31, Fair-Rite 2631801202
Great for small wires like wall-warts
************************************************************
http://www.newark.com/ 60M2921
7-16-25 in stock
500 $1.89 (large quan only)
http://palomar-engineers.com/ferrite-products/ferrite-cores
7-16-25 in stock
1: $1.95
https://www.arrow.com/en/products/2631801202/fair-rite-products
7-16-25 in stock
1: $2.20
10: $1.70
25: $1.35
100: $1.25
http://www.kf7p.com/KF7P/Ferrite_chokes.html
7-16-25 in stock
1: $2.45
10: $1.99
http://www.mouser.com
7-16-25 in stock
1: $2.69
10: $1.90
25: $1.59
100: $1.43
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