Lundahl Transformers

Tibeliusgatan 7, 761 50 Norrtälje

Phone: +46 176 139 30

Fax: +46 176 139 35

June 2015

You have a data sheet for LL5801?

June 17th, 2015|

LL5801 is a 1+1 : 2 audio isolation transformer originally designed for Kungliga Dramatiska Teatern (Royal Theater) in Stockholm. Sorry, no data sheet. A modern replacemen is LL1527 or LL1588. LL5801 pinout and usage: Pin configuration (transformer seen from component side with label readable) 4, 3, 2, 1 LL5801 8, 7, 6, 5 (I am [...]

Calrec line output transformer LL5606

June 17th, 2015|

LL5606 is a line output transformer designed for Calrec Audio, probably used as a 1:1 transformer. LL5606 has an internal Faraday shield. Pin configuration (as seen from PIN side) 6, 5, 4, 3, 2, 1 12, 11, 9, 8, 7 Usage (2 : 1): in+ pin 1 in- pin 4 connect pin 6 + 3 [...]

Calrec line output transformer LL5602

June 17th, 2015|

LL5602 is a line output transformer designed for Calrec Audio, probably used as a stepup output transformer, turns ratio 1 : 1.6 or 1 : 3.2. Pin configuration (as seen from PIN side) 6, 5, 4, 3, 2, 1 12, 11, 9, 8, 7 Usage (1: 1.6): in+ pin 1 in- pin 4 connect pin [...]

Line output transformer LL5011

June 17th, 2015|

LL5011 is a pin version of LL5008, normally used 1 : 1 Very low leakage inductance. Pin configuration (as seen from PIN side) 5, 4, 3, 2, 1 10, 9, 7, 6, Usage (1:1): in+ pin 1 in- pin 4 connect pin 2 + pin 5 out+ pin 10 out- pin 7 connect pin 9 [...]

I have some output transformers LL5008. Is there a data sheet?

June 17th, 2015|

LL5008 is a low profile, low leakage inductance line output transformer. Connections are made through short flying leads and not through pins. This was a solution to save board height. I am afraid we have no data sheet for this type. For similar function, please study the LL1524 or LL7401. Pin configuration (transformer seen from [...]

LL4902

June 17th, 2015|

LL4902 is a high turns ratio (1+1 : 22) microphone input transformer with double Faraday shields. LL4902 was designed for a customer in Australia, and is probably suitable for a 75 ohm : 10k application. The LL4902 is discontinued and no data sheet is available, but we do actually have approx. 100 x (non-ROHS-compliant) LL4902 [...]

LL4901

June 17th, 2015|

LL4901 is a 200 ohm : 5 k microphone input transformer, winding turns ratio 1+1:10. The LL4901 is discontinued and no data sheet is available. For replacements, please study LL1538. Pin configuration (transformer seen from component side with label readable) 4, 3, 2, 1 LL4901 8, 7, 6, 5 LL4901 Usage (1:5) in+ pin 1 [...]

LL4604

June 17th, 2015|

LL4604 is a general purpose isolation transformer with a mu metal lamination core. Turns ratio 1+1 : 1ct. Usage: in+ pin 1 in- pin 2 in+ pin 4 in- pin 5 (Pins 1, 2, 4, 5 can be used in series or in parallel) out+ pin 7 out centertap pin 3 out- pin 9 Shields [...]

Line input transformer LL4603

June 17th, 2015|

LL4603 is an improved LL4601, normally used 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 LL4602?

June 17th, 2015|

The LL4602 is a C-core line output transformer for unbalanced (single-end) drive. Internal structure is similar to the LL5402. LL4602 usage (turn ration 1 : 1) Pin 1 + Pin 5 primary ground pin 2 + pin 4 primary signal in (+) pin 3 not used pin 7 out + pin 10 out - pin [...]