Lundahl Transformers

Tibeliusgatan 7, 761 50 Norrtälje

Phone: +46 176 139 30

Fax: +46 176 139 35

June 2021

New mains transformer!

June 18th, 2021|Products|

Our new mains transformer LL2792 is specifically designed for 300B tube amplifiers. The 350V  secondaries can be used with full wave or with bridge rectifiers. All secondaries can be used individually except for the 2 x 75V windings. These should either be used in series or in parallel, not individually.

April 2021

New transformer in the making!

April 8th, 2021|News, Products|

Our newcomer, LL1968 is a small size transformer with flying leads designed for microphone design or repair/upgrade. Turns ratio is 2:1, and a center tap is available on the "1" side for phantom power.

March 2021

LL2793NC

March 18th, 2021|News, Okategoriserade, Products|

Our first transformer with nanocrystalline core, LL2793NC,  is now available for purchase. It is a line output transformer, similar to the LL1680 or LL1689 (9+9 : 1+1+1+1), but with turns ratio 4+4 : 1+1+1+1. Nanocrystalline is so far the most exclusive core option in our transformer range. From Rumen Artarski at Thrax Audio, one of our [...]

December 2020

Nanocrystalline C-cores

December 3rd, 2020|News, Products|

Finally our new nanocrystalline C-cores have arrived! We have been looking at nanocrystalline C-cores before, but we have not been satisfied with their quality. These kids looks so much better!!! Initially we plan to develop an interstage and a line output transformer using these C-cores.

October 2020

PCB

October 29th, 2020|Products|

This small PCB is designed for some common applications using a few of our pin compatible transformer models. Typical applications would be galvanic isolation or balanced-to-unbalanced conversion. The PCB can be used in combination with a DIN housing, or can be screw mounted without any housing.In addition to the transformer, the board has two holes [...]

Rubber Vibration Isolators

October 15th, 2020|Products|

We have been working hard to eliminate mains transformer buzz generated in the windings and isolation material.But the core hum/vibration, caused by so called magnetostriction is not possible to totally eliminate in iron cores.A way to reduce the mechanical coupling between the transformer and any resonating chassis is to use vibration isolators.Therefore, for your convenience, [...]

August 2020

Mains transformers

August 20th, 2020|Products|

Lundahl Transformers are first of all well known for audio signal transformers. But we also make a range of mains transformers, so far primarily for tube amplifier applications.Making quiet mains transformers is a challenge. Although we are proud of how quiet our mains transformers have become today, we continue to improve our manufacturing process and [...]

June 2020

New transformer

June 4th, 2020|News, Products|

A new star is born!LL9226XL, the newest member of our MC SUT family.Despite the young age, the LL9226XL is a big sister to the LL9206 and the LL9226. The LL9226XL is of course very similar to the LL9226, with the same winding structure and the samt pinout, but the amorphous cobalt strip core size has [...]

February 2020

September 2019

Using the LL1545E

September 5th, 2019|Products|

After last week's presentation of the new LL1545E we have received some questions on grounding issues and on how to connect the transformer.The purpose of an input transformer is to provide unbalanced/balanced conversions, AND to provide galvanic isolation. If the incoming unbalanced cold is connected to the local ground (for instance to the chassis through [...]