Lundahl Transformers

Tibeliusgatan 7, 761 50 Norrtälje

Phone: +46 176 139 30

Fax: +46 176 139 35

June 2015

What is LL4601?

June 17th, 2015|

 LL4601 is a high impedance line input transformer, 2:1+1. Pin configuration (as seen from PIN side) 4, 3, 1, 8, 7, 6, 5, Usage (1:1): in+ pin 8 in- pin 5 connect pin 6 + pin 7 out+ pin 4 out- pin 3 Faraday shield pin 1

How can I use the LL4501?

June 17th, 2015|

The LL4501 is a C-core line output transformer. Standard version is gapped for DC current. LL4501G is gapped for a smaller current and has been used in telephone hybrid circuits. Pin configuration (as seen from PIN side) 4, 3, 2, 1 8, 6, 5, LL4501 usage (turn ration 1 : 1) pin 1 primary signal [...]

I have some LL4202. What is it and how can I use it?

June 17th, 2015|

LL4202 is a high level mu metal core output transformer, turns ratio 1:1. Usage: in+ pin 1 in- pin 2 out+ pin 6 out- pin 5 Shields pin 4

LL3817

June 17th, 2015|

The LL3817 is identical to LL3814, a C-core line output transformer, turns ratio 3 + 3 : 1+1 except that height is 1 mm less. Usage, 3 : 2 In+ pin 1 + pin 6 in- pin 3 + pin 4 leave pin 2 + pin 5 Out+ pin 7 Out- pin 11 Connect pin [...]

LL3815

June 17th, 2015|

LL3815 is a small mu metal core microphone / line input transformer, turns ratio 1+1 : 5. Usage, 1 : 5 In+ pin 1 + pin 4 In- pin 2 + pin 3 out+ pin 8 out- pin 6 Shields pin 5 no pin at 7

LL3814

June 17th, 2015|

The LL3814 is a C-core line output transformer, turns ratio 3 + 3 : 1+1. Usage, 3 : 2 In+ pin 1 + pin 6 in- pin 3 + pin 4 leave pin 2 + pin 5 Out+ pin 7 Out- pin 11 Connect pin 12 + pin 8 Ground pin 10 no pin at [...]

LL3803

June 17th, 2015|

LL3803 is a very low impedance, high current output transformer. 2, 1 LL3803 5, 4, 3 LL3803 Usage (1 : 1.1) in+ pin 1 in- pin 2 out+ pin 3 out_ct pin 4 out- pin 5

LL3802, General purpose isolation transformer.

June 17th, 2015|

LL3802 is a ”600 : 600 ohm” general purpose isolation transformer, turns ration 2:1+1 Core: Mu metal, ED style. Usage 1:1 in+ 7 in- 9 out+ 1 out- 5 connect 2 + 4 Faraday shield 10 + 6 Usage 2:1 in+ 7 in- 9 out+ 1+4 out- 2+5 Faraday shield 10 + 6

LL2804

June 17th, 2015|

LL2804 is yet a microphone input transformer with turns ratio 1+1:7 (200 ohm : 10k) The LL2804 is discontinued and no data sheet is available. For replacements, please look at LL1530 or LL1576. Pin configuration: (Transformer seen from pin side. I am afraid I can not tell orientation, as our notes are incomplete and we [...]

I have some LL2801. What are they used for and is there any data sheet available?

June 17th, 2015|

Sorry, but there is no data sheet for the LL2801. LL2801 is a 600 ohm output transformer, turns ration 1:1 Core: Radiometal lamination, ED style. Usage: in+ 7 in- 6 out+ 9 out- 10