Inductors / Chokes / RF/IF Coils &Transformers


Toroid InductorsCup Core InductorsAdjustable Cup Core Inductors
Audio Inductors & 50/60 Hz Power Supply ChokesRF/IF Coils & Transformers

RF Chokes & Smaller Ferrite Core Inductors


I've begun listing some of my smaller inductors below, but will likely never finish with so many types and over 2700 from 0.01 uhy to 1000 mhy so let me know if you don't see what you need and I'll get back to you with what I have.

I indicate in 'Notes' when an image is of the actual inductor(s), but most simply show the style / type of inductor.

– Some of the used inductors have leads nearly as long as a new one, but most were removed from PC boards so have leads about 1/4" to 3/4" long depending on the type and size of inductor.

 

Images of the 3 Sizes Value Qty Ohms Size Notes
8.2 uH 79 <0.6Ω 3/4" sq. 0.5" lead spacing

 NEW

This is a complete listing of all of the square inductors like this that I have.

Lead Length on most is 1/2" making them best for PCB use, but a few have 1.5" leads that could be used most anywhere without having to solder on extension leads.

10/$230/$560/$8
or all 145/$15

10 uH 10 <0.1Ω 7/16" sq. 0.3" lead spacing
5 <1.5Ω 5/8" sq. 0.5" lead spacing
11 uH 2 2.5Ω 7/16" sq. 0.3" lead spacing
12 uH 3 2.0Ω 7/16" sq. 0.3" lead spacing
15 uH 8 2.3Ω 7/16" sq. 0.3" lead spacing
18 uH 2 3.2Ω 7/16" sq. 0.3" lead spacing
11 3.5 5/8" sq. 0.5" lead spacing
22uH 2 3.3Ω 7/16" sq. 0.3" lead spacing
27 uH 1 3.8Ω 7/16" sq. 0.3" lead spacing
30 uH 2 3.2Ω 7/16" sq. 0.3" lead spacing
43 uH 7 <0.2Ω 7/16" sq. 0.3" lead spacing
68 uH 1 5.6Ω 7/16" sq. 0.3" lead spacing
75 uH 3 5.6Ω 5/8" sq. 0.5" lead spacing
120 uH 4 <0.5Ω 7/16" sq. 0.3" lead spacing
470 uH 5 16 3/4" sq. 0.5" lead spacing

 

Value Style / Type Qty mA/A Ohms Manuf. / P/N Approximate Size Notes
10 uH 30   <0.2Ω   3/16" dia. x 1/2"  NEW
7   2.2Ω   3/16" dia. x 1/2"  NEW
2   <0.8Ω   3/16" dia. x 3/8"  NEW
24   <0.8Ω   3/16" dia. x 3/8"  
11 uH 1   <0.5Ω   3/16" dia. x 1/2"  NEW
12 uH 1 404 mA 1.1 Bourns / JW Miller
9310-38
5/32" x 3/8"  NEW
15 uH 1   1.5   1/4" dia. x 3/8"  
3   <0.8Ω   1/8" dia. x 1/2"  
2   1.4   1/8" dia. x 1/4"  NEW
8   1.0   1/8" dia. x 3/8"  NEW
18 uH 5   6.2   3/16" dia. x 5/8"  NEW
7
20 uH 3   2.4   5/16" x3/8"  $0.75 ea.
21 uH 6 0.600 2.7Ω Ohmite
Z-28
3/8" dia. x 1-3/4"  NEW
RF Plate Choke
22 uH 52   <0.5Ω JW Millar
L-100248
5/16" dia. x 15/16" Leads formed for PCB use with 1.2" spacing.
3 229 mA 1.9 Hammond
1530B225
1/8" dia. x 1/4"  NEW   $2 ea.
4   2.2   1/8" dia. x 3/8"  NEW
1   2.8   1/8" dia. x 1/4"  NEW
1 0.52A 1.0Ω RS 1/4" dia. x 7/16"  NEW
6   <0.6Ω   5/32" dia. x 5/16"  NEW
27 uH   2   1.4Ω   5/32" dia. x 5/8"  NEW
30 uH 1   3.4Ω   1/4" dia. x 7/8"  
33 uH 3   1.0Ω   3/16" dia. x 5/8"  NEW
15   1.0Ω   3/16" dia. x 5/8"  NEW
1   <0.5Ω   1/4" dia. x 3/4"  
8   <0.9Ω   5/32" dia. x 5/16"  
4   1.2Ω   3/16" dia. x 7/16"  
3   2.4Ω   3/16" dia. x 7/16"  
1   <0.4Ω   1/4" dia. x 1"  
36 uH 1   3.4Ω   1/4" x3/8"  $0.75
43 uH 1   <0.5Ω   1/2" dia. x 3/4"  
39 uH 1 300 mA <0.65Ω JW Miller
4628E
3/8" dia. x 1-1/8"  
47 uH 6   7.4 SC10 1/8" dia. x 3/8"  NEW
1   2.5   1/8" dia. x 3/8"  NEW
11   2.4   3/16" dia. x 3/8"  
3   1.3   3/16" dia. x 7/16"  
1   2.9   3/16" dia. x 7/16"  
50 uH 1 6.6A 0.034 Hammond
1539M04
3/4" dia. x 7/8"  NEW   $5
1   <1.0 CL10013 3/4" dia. x 2"  NEW   $5
Porcelain - 55g
51 uH 1   3.6   1/4" dia. x 5/8"  $0.75
6   2.5   5/32" dia. x 3/8"  
56 uH 10   3.3 Delevin & DEC
491311
3/16" dia. x 7/16" 5%
2   3.5   3/16" dia. x 7/16"  
1   2.5   5/32" dia. x 3/8"  
3   1.0   5/32" dia. x 5/16"  
58 uH 1   1.0   1/4" dia. x 5/8"  
62 uH 1   1.5   1/4" dia. x 5/8"  
82 uH 3   4.9   1/8" dia. x 1/4"  
100 uH 2 139 mA 4.8 Hammond
1530B104
3/16" dia. x 1/4"  NEW   $2 ea.
2   5.3   5/32" dia. x 1/2"  NEW
1   <0.4Ω   5/32" dia. x 9/16"  
3   <0.4Ω AE 24-103 7/16" dia. x 5/8"  NEW
11   1.2   5/32" dia. x 5/16"  
1   <0.2Ω   3/32" dia. x 1/4"  NEW
25   3.1   3/16" dia. x 7/16"  
4   3.9   3/16" dia. x 7/16"  
4   1.8   3/16" dia. x 7/16"  
2   2.5   3/16" dia. x 7/16"  
2   4.0   3/16" dia. x 7/16"  
120 uH 6   5.2   3/8" dia. x 1/2"  NEW   $0.75 ea.
4   4.5   3/16" dia. x 3/8"  
2   4.7   3/16" dia. x 7/16"  
1   4.1   3/16" dia. x 7/16"  
130 uH 2   6.3   1/4" dia. x 5/8"  
2   4.8   3/16" dia. x 3/8"  
150 uH 8   3.2   3/16" dia. x 7/16"  
3   5.1   3/16" dia. x 3/8"  
2   3.7   3/16" dia. x 7/16"  
220 uH 2 114 mA 9.2 Hammond
1530B224
3/16" dia. x 1/4"  NEW   $2 ea.
1   4.4   3/8" dia. x 5/8"  NEW
350 uH 17   <0.5Ω   3/8" dia. x 1/2"  NEW
Ferrite Bobbin Core
310 uH 2   9.0   7/16" dia. x 3/8"  NEW   $0.75 ea.
470 uH 2 95 mA 22 Hammond
1530B474
3/16" dia. x 1/4"  NEW   $2 ea.
1   27   1/8" dia. x 5/16"  NEW
42   23 SC10 1/8" dia. x 3/8"  NEW
4   <0.3Ω RENCO
 RL-1951
3/8" dia. x 7/8" Ferrite Bobbin Core
510 uH 1   12Ω   1/2" dia. x 1/2"  NEW   $0.75
1   8.1   7/32" dia. x 1/2"  
560 uH 2   9.1Ω   3/16" dia. x 7/16"  
2   12   3/16" dia. x 7/16"  
680 uH 8   8.7Ω   3/16" dia. x 7/16"  
2   9.8   3/16" dia. x 7/16"  
1.0 mH 1 79 mA 20Ω Hammond
1530B103
3/16" dia. x 1/4"  NEW   $2
5   32Ω   3/8" dia. x 3/8"  
2   61   1/8" dia. x 1/4"  NEW
2   15   3/16" dia. x 7/16"  
2   1.6 AE 24-104 7/16" dia. x 5/8"  NEW
38   14   3/16" dia. x 1/2"  NEW
2   10   1/2" dia. x 1" $5 ea. 2/$8
2 100 mA 22 I'm guessing
100 mA
5/8" dia. x 1-1/2" $7 ea. 2/$10
1.2 mH 1   2.6   3/8" dia. x 7/8"  $0.75
2.0 mH 12   25   3/16" dia. x 1/2"  NEW
2.2 mH 2   34   .24"w x .2"D
x .24"H
 $0.50 ea.
3.3 mH 1 53 mA 40   5/16" dia. x 3/8"  NEW   $2
4.0 mH 1   3Ω   11/16" dia. x 1-1/8"  $0.75
4.7 mH 1 48 mA 50Ω Hammond
1530C473
1/4" dia. x 3/8"   $2
2 125 mA 40 Miller #978 7/8" dia. x 7/8"
( 1-1/8" high with
screw and top
phenolic washer.)
 $2.50 ea.
5.2 mH 1   45   1/4" dia. x 3/4"  $0.75
7.0 mH 1   53   1/4" dia. x 3/4"  $0.75
12 mH 2   53   5/16" dia. x 3/4"  $2.50 ea.
22 mH 1   22 Aladdin
83-225
3/8" dia. x 1"  NEW   $2
1   53   5/16" dia. x 3/4"  $0.75

There's also a few large RFI Filter Chokes

25 uH RFI Filter Chokes
removed from mobile 2-way radios.

A ferrite rod core wound with #18 AWG
making these good for at least 10A.

Qty: 3$2 ea. or 3/$5

 

4 RFI Filter Chokes
from a 30A AC Line Filter.

(2) 150 uhy - Dale IHV-30-01
#8 AWG on a 1-3/4" dia. x 2-1/4" ferrite rod

(2)  27 uhy - Dale IH-15
#12 AWG on a 15/16" dia. x 1-1/4" laminated steel core.

All 4 for $10


Toroid Inductors


Photo Qty Value Ohms Core Color Labelled Coil Size Notes / Cost
1 40 uH <1.0 Ω Blue 104-000-176 1-3/4" dia. x 3/4" #14 AWG Wire
1 65 uH <1.0 Ω Blue T208D 1-3/8" dia. x 9/16" #14 AWG Wire
1 250 uH <1.0 Ω Blue T108D 1-3/8" dia. x 1/2" #20 AWG Wire
1 800 uH <1.0 Ω Blue 104-000-178 1-1/4" dia. x 9/16" #20 AWG Wire
2 220 uH <1.0 Ω 3-1/4" dia. x 5/8"
320g
#20 AWG Wire
$10 ea.
2/$15
2 0.8 mH
&
1.7 mH
<1.0 Ω Blue 1-1/4" dia. x 1/2"
3/4" total height
2 Windings
PCB Mntg
2/$5
2 1.4 mH 2.6 Ω Yellow 7/8" dia. x 5/16" 2/$5

Cup Core Inductors


2 x 54 uH, ≈ 0.3 Ω
1 x 150 uH, < 1 Ω
1 x 180 uH, < 1 Ω

1-5/8" sq. x 1"
Actual Cup-Core is 1" dia. x 9/16"

$4 ea.
or all
4/$10

# 84-7830

2 x 3.6 mH, 2 Ω

3/16" x 1-3/8" x 9/16" H
Actual Cup-Core is 11/16" dia. x 1/2"

2/$5
1 x   6 mH, 0.5 Ω
1 x 13 mH,  13 Ω
1/2" dia. x 3/8" 2/$3

1 x 1.5 mH, < 1 Ω

1 x 3.0 mH, < 1 Ω

7/8" sq. x 11/16"
Actual Cup-Core is
11/16" dia. x 1/2"
# TC7   F-2238

$1 ea.
(Similar Image) 2 x 200 uH, < 1 Ω 11/16" dia. x 7/16" 2/$5

Adjustable Cup Core Inductors


 Adjustable Cup Core Inductors

3.6 to 4.6 mH  -  2.3 ohms
1-3/8" dia. x 7/8" with a 1-1/2" dia. x 1-1/8" Al Can Enclosure

Qty: 13$5 ea.  - or -  all 13/$30


Audio & 50/60 Hz Iron Core Power Supply Chokes


'Click' P/N for
Larger Image
Qty Value Amps Ohms P/N - Manufacturer Size Notes Cost
1 8 uH —  A < 1 Ω 056-64 13/16" x 11/16" x 5/8"

Inductance Measured
using an L/C Meter IIB

.015kg

$2
1 500 uH —  A < 1 Ω E6191 5/8" x 5/8" x 3/4"

Inductance Measured
using an L/C Meter IIB

.015kg

$2
1 4 mH —  A < 1 Ω TLP-6652 1-5/8" x 1-1/8" x 1-1/4"

  NEW Inductance at 10 kHz

.112kgSee Note 1

$4
2 5 mH —  A < 1 Ω 188-847B
Similar to
260-188294-002
1-1/16" x 15/16" x 13/16"

  NEW Inductance at 1 kHz

.045kgSee Note 1

$4
ea.
3 15 mH —  A < 1 Ω 260-188438-001 1-3/4" x 1-1/4" x 1-3/8"

  NEW Inductance at 1 kHz

.160kgSee Note 1

$4
ea.
1 20 mH —  A 1.5 Ω 25B82142-H01 13/16" x 11/16" x 5/8"

Inductance at 1 kHz

.020kgSee Note 1

$2
6 20 mH —  A 1 Ω 260-188294-002 1-1/16" x 15/16" x 3/4"

  NEW Inductance at 1 kHz

.045kgSee Note 1

$4
ea.
1 130 mH —  A 6.8 Ω 25C84810-A01
Sim. to 25B82142 image

but w/ pins for PCB Mtng.
13/16" x 11/16" x 5/8"

Inductance at 1 kHz

.020kgSee Note 1

$2
1 150 mH —  A 7 Ω 25C82878-A09
Sim. to CH-A194 image
13/16" x 11/16" x 5/8"

Inductance at 1 kHz

.021kgSee Note 1

$2
1 620 mH —  A 0.2 Ω TLP-112-1 1-3/4" x 1-3/8" x 1-3/8"

  NEW Inductance at 1 kHz

.190kgSee Note 1

$4
1 670 mH —  A 23 Ω TLP-112-3 1-3/4" x 1-3/8" x 1-3/8"

  NEW Inductance at 1 kHz

.195kgSee Note 1

$4
1 3.0 H —  A 58 Ω 352-7056 2" x 1-5/8" x 2"

Inductance at 60 Hz

.400kgSee Note 1

$4
1 3.5 H .100 A 39 Ω 1-031-0105 2-1/4" x 1-3/4" x 2-5/8"

Inductance at 60 Hz

.690kgSee Note 1

$5
1 4 H .050 A 360 Ω C-4X Triad
Similar to C-6X
1-3/4" x 1-1/4" x 1-3/8" .150kg $10
ea.
1 5 H .065 A 330 Ω C-6X Triad 2" x 1-3/8" x 1-5/8" .260kg
1 8 H .100 A 259 Ω 157M Hammond  

.450kg

$15
ea.
1 10 H .100 A 245 Ω 158M Hammond   .560kg
1 13 H —  A 570 Ω L11 1-3/4" x 3/4" x 1-1/4"

Inductance at 300 Hz

.080kgSee Note 2

$4

Note 1: Inductance was calculated from impedance at noted frequency using method on this web page.

Note 2: Inductance was calculated using a capacitor and parallel resonant circuit at noted frequency.

In both cases, 1 & 2, current rating of measured inductor, if any, is simply an educated guess.


RF/IF Coils & Transformers


There's numerous trays of coils, coil forms, cans, etc. plus many more with vaious forms of ferrite coils and bare ferrite cores.

Listing all these items would take more time then I have plus it's not really worth doing so considering what they are worth, but e-mail if you're interested in a number of a particular type, inductance range or some other parameter to help me select which one's you would prefer and be most useful to you and I'll put together a bag full for $5 or so.


Above - There's only a small assortment of spare RF coil metal cans left which are all PC board mounting type, as are all of the other remaining cans with a coil, except for the cans on the 3 RF coils with chassis mount type cans seen below.

Left - Sorry, but all the Miller I.F. coils, "Vari-Loopsticks"
and other coils in the upper top row of the image have been Sold.

 

For those who asked or may be interested in how I manage to store and keep track of so many items ...........
The secret to storing so many items in limited space is to use storage trays and boxes that are all the same length and width and vary in height by the same incremental size (i.e. 2, 3 or 4 times the height of the smallest) as this makes grouping and stacking them very easy in the least amount of space. I also built custom sized storage shelves that are the same the depth and 2 to 4 times the width and height of a box to further maximize storage space. I began by using envelope boxes as they were a convenient size and free from many companies that regularly mail large numbers of invoices, or whatever, and then simply crush, bail & recycle countless numbers of these perfectly good, like new, reusable boxes. The boxes are too large for smaller items for which I use trays with dividers made from sheets of cardboard obtained from large cardboard boxes also available for free. A bottom and 4 side pieces make up the actual tray and by cutting evenly spaced 1/8" wide notches 1/2 the height along divider pieces allows sliding the pieces together for divider assemblies that are then simply dropped into each tray. Hot glue is used to hold everything together and by using a table saw to cut numerous pieces at the same time of each different cardboard piece required allows a number of trays to be built very quickly.


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