Chokes
We have a wide range of chokes and inductors for tube amplifiers, ranging from anode choke LL1667 (operating current from 5 mA) to filament current choke LL7233 operating at 3.4 A
Our chokes are built in our dual coil single C-core style. The use of C-cores with well-defined air-gap results in an almost constant inductance throughout the whole operating voltage range.
Most of our chokes can be ordered for operating current within about 10% of desired value (within a reasonable current range), even if this value is not presented in the data sheet. The column “Capacity” can be used to calculate the estimated resulting inductance for undocumented versions. For available sub-types of chokes, please click here.
For example the LL1638/300mA in serial connection will have an inductance approx. 1.5Vs / 0.3A = 5H.

When measuring/verifying the inductance in this type of chokes, make sure to use conditions similar to the operating conditions.

When calculation the signal headroom in a power supply choke, the ripple voltage from a rectified sinus signal is approx. 42% of original RMS voltage. As long as max voltage ratings are not exceeded, all our power supply chokes can be used in choke input configurations. In applications where the current consumptions is almost constant (such as a class A amplifier), the input current spikes will be significantly less compared to a capacitor input supply.



High current chokes, mostly used for filament supplies or for solid state application
Model
Current (A)
Configuration
series or parallel
Inductance
mH
Capacity
(I*L) (Vs)
Winding resistance
(ohm)
Weight
kg
Typical use
Price
USD
1 - 2
series
240 -120
0.24
1.8
0.83
Filament supply
80.00
2 - 4
parallel
60 - 30
0.12
0.45
0.83
Filament supply
80.00
1 - 2
series
700 - 350
0.7
3.4
1.35
Filament supply
102.00
2 - 4
parallel
170 - 80
0.35
0.9
1.35
Filament supply
102.00
0.5 - 1
series
200 -100
0.11
1
0.44
Small tube filament supply
78.00
1 - 2
parallel
50 - 25
0.05
0.25
0.44
Small tube filament supply
78.00
1 - 3
series
250 - 80
0.24
0.7
1.35
Low voltage power supply
112.00
2 - 6
parallel
60 - 20
0.12
0.3
1.35
Low voltage power supply
112.00
2 - 5
series
160 - 65
0.33
0.44
2.5
Low voltage power supply
147.00
4 - 10
parallel
40 - 16
0.15
0.11
2.5
Low voltage power supply
147.00
Very low current choke, normally used as a grid choke
Model
Current (A)
Inductance
H
Winding resistance

Weight
grams
Typical use
Price
USD
0.8mA
540
4.8K
88
Grid choke
63.00
Low current choke, normally used as anode chokes
Model
Current (mA)
Configuration
series or parallel
Inductance
H
Capacity
(I*L) (Vs)
Winding resistance

Weight
kg
Typical use
Price
USD
5 - 40
series
800 - 100
4.05
2.4K
0.75
High impedance anode choke
106.00
10 - 60
series
250 - 40
2.5
680Ω
0.75
Anode choke
101.00
LL1668AM
10 - 60
series
250 - 40
2.5
680Ω
0.75
Anode choke, amorphous core
252.00
LL1668Ag

10 - 60
series
250 - 40
2.5
680Ω
0.75
Anode choke, silver wire
1917.00
LL1668AgAM

10 60
series
250 - 40
2.5
680Ω
0.75
Anode chokem silver wire and amorphous core
2141.00
10 - 100
series
440 - 44
4.5
400Ω
1.35
Anode choke
115.00
LL2743AM
10 - 100
series
440 - 44
4.5
400Ω
1.35
Anode choke, amorphous core
295.00
LL2742Ag
10 - 100
series
440 - 44
4.5
400Ω
1.35
Anode choke, silver wire
2949.00
LL2743AgAM
10 - 100
series
440 - 44
4.5
400Ω
1.35
Anode choke, silver wire and amorphous core
3217.00
Model
Current (mA)
Configuration
series or parallel
Inductance
H
Capacity
(I*L) (Vs)
Winding resistance
(ohm)
Weight
kg
Typical use
Price
USD
150 - 400
series
10 - 4
1.5
36
1.35
Power supply
106.00
300 - 800
parallel
2.5 - 1
0.8
9
1.35
Power supply
106.00
100 - 200
series
20 - 10
2
60
1.35
Power supply
106.00
200 - 400
parallel
5 - 2.5
1
15
1.35
Power supply
106.00
100 - 200
series
17 - 9
1.7
130
0.75
Power supply
97.00
200 - 400
parallel
4 - 2
0.8
32
0.75
Power supply
97.00
100 - 300
series
42 - 14
4.2
160
1.35
Power supply
113.00
200 - 600
parallel
10 - 3
2
40
1.35
Power supply
113.00
500 - 1000
series
6 - 3
3
11
4.9
Power supply
174.00
1000 - 2000
parallel
1.5 - 0.7
1.5
3
4.9
Power supply
174.00
Medium current choke, normally used in anode power supplies
To place an order, please click here