Description
A selection of iron powder Toroids ferrite cores suitable for HF/VHF power amplifiers, HAM radio projects and other applications
Radio Frequency (RF) Iron Powders
General Material Properties
Material | Reference Permeability |
Powder Type | Temp Coef of Perm (+ppm/C°) |
Density gm/cm |
Max Frequency (MHz) |
Relative Cost | Color Code Toroid |
---|---|---|---|---|---|---|---|
-0 | 1 | Phenolic | N/A | N/A | N/A | N/A | Tan/Tan |
-1 | 20 | Carbonyl Iron | 280 | 6.4 | 10 | 3.8 | Blue/Clear |
-2 | 10 | Carbonyl Iron | 95 | 5 | 45 | 2.2 | Red/Clear |
-3 | 35 | Carbonyl Iron | 255 | 6.5 | 5.0 | 3.3 | Gray/Clear |
-4 | 9 | Carbonyl Iron | 280 | 5.0 | 17 | 2.2 | Blue/White |
-6 | 8.5 | Carbonyl Iron | 35 | 5.0 | 55 | 3.6 | Yellow/Clear |
-7 | 9 | Carbonyl Iron | 30 | 5.0 | 50 | 3.0 | White/Clear |
-8 | 35 | Carbonyl Iron | 255 | 6.5 | 5.0 | 3.1 | Yellow/Red |
-10 | 6 | Carbonyl Iron | 150 | 4.9 | 83 | 5.5 | Black/Clear |
-15 | 25 | Carbonyl Iron | 190 | 6.4 | 7.0 | 3.4 | Red/White |
-17 | 4 | Carbonyl Iron | 50 | 4.8 | 170 | 3.5 | Blue/Yellow |
2, ‐4, ‐6 & ‐7 Materials: These are the most popular carbonyl iron mixes. They will provide High Q up to 40 MHz and the most popular for amateur radio and variety of other communication applications. They are also useful for moderate band transformers in the 200 to 400 MHz frequency range
‐1, ‐3, ‐8 & ‐15 Materials: These materials are annealed carbonyl irons providing the highest carbonyl permeability. They are useful for high Q applications below 1 MHz and will provide the broadest band transformers covering a typical range from 50 to 500 MHz.
‐10 & ‐17 Materials: These materials are the highest frequency carbonyl irons. They will provide high Q up to 150 MHz and are a popular material for cable television applications. They will produce moderate band transformers covering 400 to 700 MHz.
‐0 Material: This is a non‐magnetic material. It provides a solid winding form for winding air coils. It has excellent temperature stability and will provide high Q up to the highest frequencies. It is also useful for moderate band transformer applications covering a typical range from 600 MHz to 1 GHz.
Mix 1 material
– Annealed carbonyl iron powder material
– Provides the highest carbonyl permeability
– Useful for high Q applications below 1 MHz
– Used for broadband transformers from 50 to 500 MHz.
– Permeability of 20μ
– Available in Toroid, Plain, Sleeve and Threaded Core shapes
Mix 2 material
– Industry standard for RF and Audio Applications
– Carbonyl Iron mix
– High Q up to 40 MHz
– Used for moderate band transformers 200 to 400 MHz
– Permeability of 10μ
– The low permeability results in lower operating AC flux density than
– other materials with no additional gap‐loss.
– For a slightly higher permeability consider -14 material.
Mix 3 material
– Annealed carbonyl iron powder material
– Provides the highest carbonyl permeability
– Used for high Q applications below 1 MHz
– Ideal for broadband transformers from 50 to 500 MHz
– Permeability 35μ
– Available in Toroid, Cup, Hollow, Plain, Sleeve and Threaded Core shapes
Mix 4 material
– Carbonyl Iron powder material
– High Q up to 40 MHz
– Used in amateur radio and RF communication applications
– Useful for moderate band transformers 200 to 400 MHz
– Permeability 9μ
– Available in Threaded Core shape only – custom shapes available
Mix 6 material
– Carbonyl Iron powder mix material
– High Q up to 40 MHz
– Popular for RF communication applications
– Useful for moderate band transformers 200 to 400 MHz
– Permeability 8.5μ
– Available in Toroid, Balun, Cup, Hollow, Plain, Rectangular Toroid, Sleeve and Threaded Core shapes
Mix 7 material
– Carbonyl Iron Powder Mix material
– High Q up to 40 MHz
– Suited for amateur radio and RF communications
– Used for moderate band transformers 200 to 400 MHz
– Permeability 9μ
– Available in Toroid, Hollow, Plain and Threaded Core shapes
Mix 8 material
– Annealed carbonyl Iron Powder material
– Provides the highest carbonyl permeability
– High Q below 1 MHz
– Used for the broadest band transformers from 50 to 500 MHz
– Low core loss and good linearity under high bias conditions
– Good high frequency material – premium priced
– Permeability 35μ
– Available in Toroid, E Core, Balun, Bus Bar, Cup, Disc, EH, EM, U, Plain,
– Rectangular, Sleeve and Threaded Shape cores
– Custom Shapes also available
Mix 10 material
– High frequency carbonyl Iron Powder material
– High Q up to 150 MHz
– Ideal material for cable television applications
– Suitable for moderate band transformers from 400 to 700 MHz
– Permeability 6μ
– Available in Toroid, Balun, Hollow, Plain, Rectangluar, Sleeve, and Threaded Core Shapes
– Custom shapes also available
Mix 15 material
– Annealed carbonyl Iron Powder material
– Provides high carbonyl permeability
– High Q applications below 1 MHz
– Suited for the broadest band transformers from 50 to 500 MHz.
– Permeability 25μ
– Available in Toroid Core shapes, custom shapes also available
Mix 17 material
– High frequency carbonyl Iron Powder material
– High Q up to 150 MHz
– Ideally designed for cable television applications
– Suited for moderate band transformers from 400 to 700 MHz.
– Permeability 4μ
– Available in Toroid, Balun, Plain, Rectangular and Threaded Core shapes
– Custom shapes also availableMix 17 material
Mix 26 material
– Carbonyl Iron Powder mix material
– Ideal, cost‐effective for a wide variety of power conversion and line filter applications
– High permeability ideal for PFC chokes <50 KHz
– Permeability 75μ
– Available in Toroid, E Core, Block Core, Bus Bar, Disc Core, EM, Hollow, U Core I Core and Plain Core shapes
– One of the most widely specified Power Conversion Materials
Reviews
There are no reviews yet.