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Ferrite Bobbin Range
  Ferrite Core Bobbins

Four sizes of Ferrite Bobbins suitable for winding custom value Inductors as used in loudspeaker crossovers. Designated as Type A through to D.
A 'guide' to usage is as follows:-
Type A: FBA1823 Small value Inductors for Tweeter frequency modifications / tweeks.
Type B: FBB2728 Low power Bass and Tweeter crossovers to 50w rms max. system power.
Type C: FBC2535 Medium power Bass and Tweeter crossovers to 80w rms max. system power.
Type D: FBD3040 Medium power Bass and Tweeter crossovers to 100w rms max. system power.

Air Cored Bobbins
  Air Core Bobbins

Three sizes of Glass reinforced polyamid coil formers suitable for the DIY constructor to wind custom coils for that special project.

Using 1.0mm copper wire the following inductance ranges can be achieved.
Type 1 Bobbin (0.1 - 0.39)mH,
Type 2 Bobbin(0.1 - 0.91)mH,
Type 3 Bobbin 0.47 - 2.2)mH.



Air Cored Coils
  Air Core Inductors

Air cored coils wound on hard glass-reinforced Polyamid formers.
Type 1 Bobbin (0.1 to 0.39)mH, (17 * 40)mm,
Type 2 Bobbin (0.1 to 0.68)mH, (15 * 47)mm,
Type 3 Bobbin (0.47 to 2.2)mH, (25 * 58)mm.
Centre boltdown with M4 Nylon bolt or fix with Silicone.
Tolerances +/- (10%, 5% or 2%).

Loudspeaker Components, Crossover Inductors

* Ferrite Bobbins. All dimensions are in mm and are approximate.

Order Code Height Max Diam. Max Core Diam. Core Height Price 1 to 5 Price 6 to 10
FBA1823 18 23 13 12 0.78/ea 0.71/ea
FBB2728 27 28 17 18 1.51/ea 1.36/ea
FBC2535 25 35 20 17 1.96/ea 1.77/ea
FBD3040 30 40 20 21 2.02/ea 1.81/ea

* Ferrite Crossover Coils, Type C. Price per piece.

Order Code Description Price GBP each    
  Ferrite Inductors, Type C Bobbin. Tolerance 10% 5% 2%
FBCC47 0.47mH, 0.8mm Wire, DCR 0.14 Ohms 3.55 3.94 4.26
FBCC56 0.56mH, 0.8mm Wire, DCR 0.16 Ohms 3.65 4.01 4.38
FBCC68 0.68mH, 0.8mm Wire, DCR 0.17 Ohms 3.80 4.19 4.67
FBCC75 0.75mH, 0.8mm Wire, DCR 0.18 Ohms 3.85 4.24 4.69
FBCC82 0.82mH, 0.8mm Wire, DCR 0.19 Ohms 3.90 4.29 4.71
FBCC91 0.91mH, 0.8mm Wire, DCR 0.21 Ohms 3.97 4.36 4.74
FBCC10 1.00mH, 0.8mm Wire, DCR 0.22 Ohms 4.04 4.44 4.84
FBCC12 1.20mH, 0.8mm Wire, DCR 0.24 Ohms 4.25 4.67 5.09
FBCC15 1.50mH, 0.8mm Wire, DCR 0.27 Ohms 4.45 4.89 5.32
FBCC18 1.80mH, 0.8mm Wire, DCR 0.31 Ohms 4.55 5.00 5.46
FBCC22 2.20mH, 0.8mm Wire, DCR 0.35 Ohms 4.69 5.15 5.62
FBCC25 2.50mH, 0.8mm Wire, DCR 0.38 Ohms 4.88 5.36 5.85

* Air Cored Crossover Bobbins.

Order Code Description Price GBP 1 to 5 6 to 10 11 to 20
ACFRMS1 Air Core Bobbin Height 17mm. Diam 40mm. 0.54/ea 0.50/ea ******
ACFRMS2 Air Core Bobbin Height 15mm. Diam 47mm. 0.67/ea 0.64/ea ******
ACFRMS3 Air Core Bobbin Height 25mm. Diam 58mm. 0.80/ea 0.77/ea ******

* Air Cored Crossover Coils.
* Air core coils, Type 1 Bobbin, (17 * 40)mm. Price per piece.

Order Code Description Price GBP each    
  Air Cored Coils, Type 1 Bobbin. Tolerance 10% 5% 2%
ACC110 0.10mH, 1.0mm Wire, DCR 0.12 Ohms 3.39 3.72 4.06
ACC115 0.15mH, 1.0mm Wire, DCR 0.16 Ohms 3.62 3.97 4.33
ACC122 0.22mH, 1.0mm Wire, DCR 0.20 Ohms 4.21 4.63 5.06
ACC133 0.33mH, 1.0mm Wire, DCR 0.25 Ohms 4.42 4.85 5.31
ACC139 0.39mH, 1.0mm Wire, DCR 0.29 Ohms 4.54 4.99 5.44




* Air core coils, Type 2 Bobbin, (15 * 47)mm. Price per piece.

Order Code Description Price GBP each    
  Air Cored Inductors, Type 2 Bobbin. Tolerance 10% 5% 2%
ACC210 0.10mH, 1.0mm Wire, DCR 0.13 Ohms 3.39 3.72 4.06
ACC215 0.15mH, 1.0mm Wire, DCR 0.16 Ohms 3.61 3.97 4.33
ACC222 0.22mH, 1.0mm Wire, DCR 0.20 Ohms 4.20 4.63 5.06
ACC233 0.33mH, 1.0mm Wire, DCR 0.25 Ohms 4.42 4.85 5.31
ACC239 0.39mH, 1.0mm Wire, DCR 0.27 Ohms 4.54 4.99 5.44
ACC247 0.47mH, 1.0mm Wire, DCR 0.30 Ohms 4.65 5.11 5.58
ACC256 0.56mH, 1.0mm Wire, DCR 0.34 Ohms 4.99 5.48 5.99
ACC268 0.68mH, 1.0mm Wire, DCR 0.38 Ohms 5.33 5.86 6.39


* Air core coils, Type 3 Bobbin, (25 * 58)mm. Price per piece.

Order Code Description Price GBP each    
  Air Cored Inductors, Type 3 Bobbin. Tolerance 10% 5% 2%
ACC347 0.47mH, 1.0mm Wire, DCR 0.30 Ohms 4.65 5.11 5.58
ACC356 0.56mH, 1.0mm Wire, DCR 0.34 Ohms 4.99 5.48 5.99
ACC368 0.68mH, 1.0mm Wire, DCR 0.38 Ohms 5.33 5.86 6.40
ACC375 0.75mH, 1.0mm Wire, DCR 0.41 Ohms 5.59 6.15 6.71
ACC382 0.82mH, 1.0mm Wire, DCR 0.45 Ohms 5.85 6.42 7.01
ACC391 0.91mH, 1.0mm Wire, DCR 0.49 Ohms 6.19 6.79 7.43
ACC310 1.00mH, 1.0mm Wire, DCR 0.51 Ohms 6.53 7.20 7.83
ACC312 1.20mH, 1.0mm Wire, DCR 0.60 Ohms 7.21 7.92 8.66
ACC315 1.50mH, 1.0mm Wire, DCR 0.64 Ohms 7.90 8.68 9.47
ACC318 1.80mH, 1.0mm Wire, DCR 0.71 Ohms 8.27 9.04 9.91
ACC322 2.20mH, 1.0mm Wire, DCR 0.81 Ohms 8.61 9.48 10.36

All Prices include VAT @ 17.5%.   See carriage charges for further information.