Amidon Ferrite Beads, Coil Forms, Toroidal Cores.

Amidon
Cores, Beads, Rods
and Balun Kits

Miscellaneous

The Amidon Associates produces a broad line of ferrite beads, coil forms, cores and specialty items for the electronic experimenter.
These products have wide use in RFI suppressions, antenna design and matching. (Dimensions are in inches). Click here for material chart.

A Ferrite bead is a dowel-like device which has a center hole and is composed of ferromagnetic material. When placed on to a current carrying conductor it will act as an RF choke. It offers convenient, inexpensive, yet effective means
of RF shielding, parasitic suppression and RF decoupling.

Order #	Model	Description	Pkg.	O.D.	I.D.	Height	RFI Attenuation	List	Price
	FB 43- 101	Ferrite Beads	12	.138	.051	.128	40-200 MHz		Not in stock
#4610	FB 43- 201	Ferrite Beads	12	.076	.043	.150	30-400 MHz	$7.20	$2.98
#1528	FB 43- 801	Ferrite Beads	12	.296	.094	.297	40-200 MHz	$8.40	$2.98
	FB 43- 2401	Ferrite Beads	12	.380	.197	.190	40-200 MHz		Not in stock
#4491	FB 43- 6301	Ferrite Beads	12	.375	.194	.410	40-200 MHz	$7.80	$2.98
	FB 61- 101	Ferrite Beads	12	.138	.051	.128	above 200 MHz		Not in stock
#1532	FB 73- 101	Ferrite Beads	12	.138	.051	.128	10-50 MHz	$6.00	$2.98
	FB 73- 801	Ferrite Beads	12	.296	.094	.297	10-50 MHz		Not in stock
	FB 73- 1801	Ferrite Beads	12	.200	.062	.437	10-50 MHz		Not in stock
	FB 73- 2401	Ferrite Beads	12	.380	.197	.190	10-50 MHz		Not in stock
	FB 75B- 101	Ferrite Beads	12	.138	.051	.128	2-30 MHz		Not in stock
#2838	FB 77- 6301	Ferrite Beads	12	.375	.194	.410	2-30 MHz	$8.40	$4.20

Ferrite toroidal cores. A_L values = mH/1000 turns. First numerals in model indicate O.D., second indicate material.

Order # Model Description Pkg. O.D. I.D. Height A_L List Price Order
#1536 FT  23-61 Ferrite Toroidal Core   4 .230 .120 .060 24.8 $  7.00 $  2.98

#1537 FT  23-77 Ferrite Toroidal Core   4 .230 .120 .060 356 $  3.00 $  1.50

#1538 FT  37-43 Ferrite Toroidal Core   4 .375 .187 .125 420 $  3.60 $  1.80

#0602 FT  37-61 Ferrite Toroidal Core   4 .375 .187 .125 55.3 Not in stock

#4348 FT  37-67 Ferrite Toroidal Core   4 .375 .187 .125 17.7 $  3.60 $  1.80

FT  50-43 Ferrite Toroidal Core   3 .500 .281 .188 523 Not in stock

FT  50-61 Ferrite Toroidal Core   3 .500 .281 .188 68 Not in stock

FT  50-J Ferrite Toroidal Core   3 .500 .281 .188 2710 Not in stock

FT  82-43 Ferrite Toroidal Core   3 .825 .520 .250 557 Not in stock

#3579 FT  82-61 Ferrite Toroidal Core   3 .825 .520 .250 73.3 $  6.00 $  2.98

FT  82-77 Ferrite Toroidal Core   3 .825 .520 .250 1060 Not in stock

   FT114-43 Ferrite Toroidal Core   1 1.142 .750 .295 603 Not in stock

FT114-61 Ferrite Toroidal Core   1 1.142 .750 .295 79.3 Not in stock

#2953 FT193A-F Ferrite Toroidal Core   1 1.932 1.250 .750 4460 $12.00 $  4.98

FT193-J Ferrite Toroidal Core   1 1.932 1.252 .625 6065 Not in stock

FT240-61 Ferrite Toroidal Core   1 2.400 1.400 .500 173 Not in stock

FT240-77 Ferrite Toroidal Core   1 2.400 1.400 .500 3130 Not in stock

FT240-K Ferrite Toroidal Core   1 2.400 1.400 .500 Not in stock

Iron powder toroidal cores. A_L values = µH/100 turns.

Order # Model Description Pkg. O.D. I.D. Height A_L List Price Order
#1552 T  25-  2 Iron Powder Toroidal Core   5 .250 .120 .096 34 $  4.95 $  2.48

#1554 T  30-  6 Iron Powder Toroidal Core   5 .370 .151 .128 36 $  4.95 $  2.48

#0647 T  37-  2 Iron Powder Toroidal Core   5 .375 .205 .128 40 $  4.50 $  1.98

T  37-  6 Iron Powder Toroidal Core   5 .375 .205 .128 30 Not in stock

#1562 T  37-10 Iron Powder Toroidal Core   5 .375 .205 .128 25 $  4.50 $  1.98

#4869 T  44-10 Iron Powder Toroidal Core   4 .440 .229 .159 33 $  4.60 $  1.98

   T  50-  2 Iron Powder Toroidal Core   4 .500 .300 .190 49 Discontinued
#1565 T  50-  6 Iron Powder Toroidal Core   4 .500 .300 .190 40 $  5.00 $  1.98

#4821 T  50-10 Iron Powder Toroidal Core   4 .500 .303 .190 31 $  5.00 $  1.98

#1566 T  68-  2 Iron Powder Toroidal Core   4 .690 .370 .190 57 $  5.00 $  1.98

T  68-  6 Iron Powder Toroidal Core   4 .690 .370 .190 47 $ Not in stock

#1556 T  80-  2 Iron Powder Toroidal Core   3 .795 .495 .250 55 $  5.00 $  1.98

#4868 T  80-  6 Iron Powder Toroidal Core   3 .795 .495 .250 $  7.20 $  2.98

#4779 T  94-  2 Iron Powder Toroidal Core   2 .942 .560 .312 $ 3.50 $  1.48

#1567 T  94-26 Iron Powder Toroidal Core   2 .942 .560 .312 590 $  3.00 $  1.48

#6847 T106-  1 Iron Powder Toroidal Core   2 1.060 .570 .437 $  8.20 $  3.98

T106-  2 Iron Powder Toroidal Core   2 1.060 .570 .437 325 Not in stock

#6848 T106-  3 Iron Powder Toroidal Core   2 1.060 .570 .437 $  7.90 $  2.98

#4609 T106-  6 Iron Powder Toroidal Core   2 1.060 .570 .437 116 $  9.90 $  3.98

#6849 T106-15 Iron Powder Toroidal Core   2 1.060 .570 .437 $  9.00 $  3.98

#0781 T184-  2 Iron Powder Toroidal Core   1 1.840 .950 .710 240 $  8.00 $  3.98

T200-  2 Iron Powder Toroidal Core   1 2.000 1.250 .550 120 Not in stock

Multi-aperture cores. A_L values = mh/1000 turns.

Order # Model Description Pkg. O.D. I.D. Hght Th A_L List Price Order
BN-43-202 Two Hole Core   4 .525 .150 .550 .295 2890 Not in stock

#1871 BN-43-302 Two Hole Core   4 .525 .150 .407 .295 2200 $6.00 $2.98

BN-73-702 Two Hole Core   4 .525 .150 .550 .295 8500 Not in stock

Split cores.

Order # Model Description Pkg. O.D. I.D. Hght D Max cbl D. List Price Order
#1087 2x31-3551p2 Split cores for round cable   1 1.15 .740 1.650 .579 0.750 $  9.99 $  4.98

2x43-  251p2 Split cores for round cable   1 .705 .275 1.272 .362 0.250 Not in stock

#1138 2x43-  151p2 Split cores for round cable   1 1.142 .528 1.280 .583 0.500 $12.95 $  5.98

Ferrite rods. A_L values = mH/1000 turns.

Order # Model Description Material Diameter Length A_L Perm. List Price Order
R33-050750 Ferrite Rod 33 .50 7.5 70 800 Not in stock

R61-050400 Ferrite Rod 61 .50 4.0 43 125 Not in stock

R61-050750 Ferrite Rod 61 .50 7.5 49 125 Not in stock

Balun Kits.

Order # Model Description Core Wire Ratios Price Order
AB-240-125 Balun Kit FT-240-61 14 gauge 10 feet 4:1 or 1:1 Not in stock

Click here for information on the Amidon Technical Reference.