February 2020
September 2019
Using the LL1545E
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 [...]
August 2019
New version of our popular LL1545 input transformer!
The LL1545A is an excellent sounding line input transformer used in both pro audio and audiophile applications. However, one of the frequent critics regarding the LL1545A is the pinout. The fairly small LL1545A has in total 15 pins in two tight rows, and is probably too flexible for most users.In the new version of the [...]
July 2019
New ”Chokes” page!
This year we have extended our range of chokes and inductors, and therefore restructured our web page where the chokes are presented. The chokes are separated into four different categories based on operating current. As there is no fundamental difference between chokes intended for power supplies applications or for anode choke applications, anode chokes can [...]
May 2019
Conrad Johnson and Lundahl
“I just wanted to let you know that I absolutely love the build quality and sound quality of your transformers.” Statement received from Jeff Fischel at Conrad-Johnson, together with a link to their new power amplifier, the ART27A Thank you, Jeff, for sharing your opinion! We are really happy that you like our transformers.
April 2019
Stereophile review
At Axpona last week we met up with one of our customers, Victor Kung of VK Music, who was displaying amplifiers with Lundahl iron in his booth. One amplifier on display, the Elekit TU-8600R just received a very positive review in the Stereophile April issue.
APL Hi-Fi & Lundahl
“Thank you for enabling me to obtain such a sound quality through your amazing transformers! Your exceptional transformers are mentioned and pictured too.” We received the above words in an email from Alex Peychev at APL Hi-Fi, with a link to a (very favorable!) review. Thank you Alex for the super nice words!
March 2019
The Lundahl “bible”
Our downloadable catalogue is back! Upon request, an updated version of our downloadable catalogue is now available under technical papers or click here to start the download. The catalogue is a pdf file with a selection guide, all datasheets for our transformers and some technical papers. Enjoy! If you prefer to work online, you can [...]
November 2018
Designer’s comments on EL34 push-pull amplifier project.
One of the most popular projects among our collection of amplifier schematics is the EL34 push-pull amplifier designed and described by Claus Byrith. Based on feedback from builders of this amplifier, Claus has now written a short “Designer’s comments”. You can find the project and the comments here: https://www.lundahltransformers.com/old-fasioned-30w-push-pull-amplifier/
October 2018
The “Magic” LL1527
LL1527, one of our oldest audio transformer designs, is still in production and still very popular. Many sound engineers have a couple of LL1527 laying around to be used when problem arises. Frequently engineers tell us: “I had some hum in my system, but as soon as I installed one of your magic LL1527, the [...]