Lundahl Microphone Transformer, LL1940
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  • Lundahl Microphone Transformer, LL1940

Lundahl Microphone Transformer, LL1940

LL1940
54,87 € Без НДС
66.94 € с НДС для покупателей из ЕС
Lundahl Microphone Transformer, LL1940
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Tube microphone output transformer LL1940

LL1940 is a high turns ratio transformer designed for tube microphones. Conventionally, this type of transformer has a mu metal lamination core for minimum distortion and maximum transparency. For the LL1940 we have chosen a silicon iron C-core (with approx 10 times as high distortion compared to mu metal) to add more transformer character to the signal. The transformer has an internal Faraday shield for optimal output balance, but no housing.

Dimensions
(L x W x H above PCB, in mm)

31 x 25 x 16

Weight

35 g

Turns ratio

9 : 1 + 1

Spacing between pins

3.81 mm (0.15")

Spacing between rows of pins

22.86 mm (0.9")

Rec. PCB hole diameter:

1.5 mm

Static resistance of primary (pins 1-4):

1.5 k?

Static resistance of each secondary (pins 6-7, 9-10):

34?

Max primary signal level.

18V RMS at 20Hz
45V RMS at 50 Hz

Primary no load impedance

30 k? at 50 Hz

Frequency response. Source impedance 10k. Load 600 ohms Secondaries connected in parallel

20 Hz 50kHz + 0 / - 3 dB
40Hz 30 kHz + 0 / -1 dB

Frequency response. Source impedance 50k. Load 600 ohms Secondaries connected in parallel

50 Hz 40kHz + 0 / - 3 dB

Distortion. Source impedance 10k.

Approx 1% THD at 50Hz, 20dBU primary level.

Isolation between windings/ between windings and core:

4 kV / 2 kV
LL1940
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