:: well-audio-labs.com || transformers

LUNDAHL Transformers

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Type Model DC Inductance Prim. Load Secondary Loss, dB Power

current Impedance connection

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Single-End output transformers. (Max power @ 30 Hz)

LL1623 90mA 30H 5.6k 8, 16 0.2 13W

3.0k 4, 8, 16 0.5 25W

1.6k 4, 8, 16 0.8 50W

LL1627 140mA 12H 2.3k 8, 16 0.2 13W

1.2k 4, 8, 16 0.5 25W

650ohm 4, 8, 16 0.8 50W

LL1663 100mA 17H 5.0k 8 - 8W

LL1664 100mA 17H 3.0k 8 - 10W

( for 211 / 845 )->LL9202 23k : 8 / 16 ohm 13w

11k : 4 / 8 / 16 ohm 25w

6.5k : 4 / 8 / 16 ohm 50w

Push-Pull (Max power @ 30 Hz)

LL1623 210mA 150H 5.6k 8, 16 0.2 62W

3.0k 4, 8, 16 0.5 125W

1.6k 4, 8, 16 0.8 250W

LL1663 160mA - 5.0k 8 - 40W (UL)

ĄĄ

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Type Model Turns Primary Recommended Connection Freq.

Ratio inductance DC current Response

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Interstage / Line output

LL1671 1+1+1+1 : 2+2 35H 30mA 4 : 1 10k : 600ohm

35H 30mA 1 : 1 30Hz - 30kHz 3k ohm

10H 60mA 1 : 2 40Hz - 25kHz 1k ohm

10H 60mA 1 : 1 + 1 40Hz - 25kHz 1k ohm

High current Interstage (for 300B driver tube)

LL1677 1+1+1+1 : 4+4 24H 80mA 1 : 2 23Hz - 34kHz 1k ohm

(1.2 Tesla saturation)

Line output

LL1680 9+9 :1+1+1+1 UTC LS27, 5mA

18:04 210H 33V RMS Alt A 15Hz - 50kHz 15k : 600ohm Bal. output

18:04 210H 33V RMS Alt B 15Hz - 40kHz 15k : 600ohm un_Bal. output

18:02 210H 16V RMS Alt C 15Hz - 55kHz 15k : 150ohm Bal. output

18:02 210H 16V RMS Alt D 15Hz - 40kHz 15k : 150ohm un_Bal. output

Mains chokes

LL1673 10H 200mA

2.5H 400mA

LL1673 20H 100mA

5H 200mA

Filament choke or used in choke input power supplies

LL1694 1.5A + 1.5A or parallet 3A

Preamp Mains

LL1683 115 + 115 : 250 - 0 - 250V 80mA or 0-250 x2

48V 100mA 6.6V 3A

5.2V 3A 6.6V 3A

5.2V 3A