Entries by Kevin Carter

New Lundahl Audiophile Transformer and PS Chokes

Lundahl Transformers will shortly announce the availability and pricing for three new parts.  The data sheets are linked below: LL2766 – a compact (LL1660 size) low power output transformer for tube amplifiers, SE or PP.  Think SE 45/46/47 or PP 6V6GT and many more low power possibilities… LL2771 – a big (1A, 3H) power supply choke.  Would […]

Gerus Audio is using Lundahl Transformers in their Amplifiers

Scott Gerus has been building tube amplifiers for some time now, but recently retired and has created a website (www.300Bamps.com) to make his designs more broadly available.  He has designed and built several monoblock and stereo single-ended and push-pull amplifiers, which can be viewed on his website.  Interestingly, he does the woodworking and metalworking for his […]

Erhard Audio uses Lundahl Output Transformers in their designs

We are happy to note that Erhard Audio (formerly Tube Nirvana) has auditioned Lundahl amplifier output transformers in their models and, as a result, are using Lundahl output transformers now in production.  You can read their take on these and other parts decisions here:  www.erhard-audio.com/Blog.html and see power the amplifiers here: www.erhard-audio.com/Ray.html www.erhard-audio.com/Elvis.html www.erhard-audio.com/Buddy.html and a headphone amplifier: www.erhard-audio.com/Billie.html […]

New Lundahl Catalog Available

Lundahl Transformers has compiled a new catalog in .pdf format that is downloadable from their website.  It includes data sheets for the newest models, as well as the older ones that we have relied on for great sound over twenty years.  It can be viewed or downloaded here:  http://www.lundahl.se/technical-information/

Fall Inventory Reduction Sale on Raleigh Audio Products

Dave Davenport of Raleigh Audio has announced a Fall inventory-reduction sale. While inventory lasts, assembled DACs and Preamps are being offered at a 20% discount. As is usual, the Preamps are a fixed configuration, while the input configuration of the DACs are custom. Below are listed some sample configurations with their sales prices. You can […]

Monoblock PP Amplifier Using New Amplifier Kits

I’ve designed and begun the assembly of a PP KT120/150 monoblock amplifier that uses the new capacitor-coupled 6J49P PP input stage and one of the new power supply kits.  The power supply is choke input for low noise and uses a lower cost, over-sized toroidal power transformer.  The output stage is operated Class A1 with […]

New Interstage Transformers Designed for Single-Ended Amplifiers

Lundahl Transformers has quietly introduced a series of new transformers that were designed specifically for SE use as interstage transformers. While the LL1660, LL1692A, and LL1671 have been great transformers in my hands and in those of many others, there was performance to be gained by designing new transformers whose winding geometry has been optimized […]

Audio Transformer Basics 101

We’ve added a new series of reference documents under the “Transformers” menu heading, labeled “Transformer Basics 101”.  These articles were developed and authored for Lundahl Transformers by a well-known pro audio designer, Ken DeLoria.  These provide an excellent introduction to audio transformers:  rationale for use, applications examples, construction/manufacturing, and a bit of transformer theory and […]

Amplifier Input Stage and Power Supply Kits

These kits are now all in stock ready to go.  They make amplifier construction using the output stage of your choice straightforward and sonically rewarding.  A few early adopters have already built PP amps using the interstage transformer input stage and a variety of output tubes, including PP 6C33C and PP KT150 tubes.  Pictures and […]