4-7-2017

UL40-S2 tested with modern tubes.

6-6-2017

The results of the TS-2016-project (design of 2A3/300B SE-amp) are available now.

17-05-2017

A new Trans-PP-amp from Eric Rabeuf (Fr)

16-05-2017

Video Masterclasses of Menno in NL, DL....

27-01-2017

The 2A3/300B-SE project of TubeSociety has started.

10-5-2016

New Trans Adventures with CCS operation point stabilization.

14-3-2016

The MCML05 modification with an ECC99 can cause some problems. Read here how to solve.

9-3-2016

The PR20HE amp with a special VDV-8070-CFB toroidal OPT.

3-3-2016

First announcement TRANS-ADVENTURES.

19-8-2015

Das neue Buch “Vanderveen Trans Röhrenverstärker” ist jetzt erhaltlich.

20-5-2015

New results are available about the TubeSociety Vatsea Project.

7-4-2015

Menno’s newest book about Trans Valve Amplifiers is available now.

18-2-2015

The POW80 is in stock again; the prices of POW80 and GIT80 have raised a little due to higher material costs.

2-12-2014

Schematic of Vatsea-Trans showed wrong diode (BYX96). Now replaced by 1N4007.

17-11-2014

The Tubesociety Students Project (called Vatsea) has started. Regular check for new results.

17-11-2014

POW80 is out of stock. When new supply is available, we will inform.

15-11-2014

The new book “Vanderveen Trans Valve Amplifiers” is available now in Dutch. Send a mail to info@mennovanderveen.nl for ordering. German and English editions will be available around May 2015, distribution by Elektor International Media.

15-7-2014

Chapter 3-A of Menno’s new TRANS book is is available now.

2-7-2014

The second part of chapter 2 about TRANS is online now.

12-6-2014

The first part of chapter 2 of my new book 4 is available.

12-6-2014

The Surges in the PR20HE amplifier have changed from 300 into 500 mA. See figure 3.

12-6-2014

Menno’s third book (Designing Tube Amplifiers) is also available in the Serbian language.

12-6-2014

DVD Entwurf eines Röhrenverstärkers nu in Duitse jetzt erhaltlich .

30-5-2014

Soon Menno will start a proof reading of parts of his newest book about “TRANS-VALVE-AMPLIFIERS”. Check every two weeks for new parts ..

1-10-2013

A new master class DVD (in Dutch) about a one valve amplifier is available.

1-10-2013

The third book of Menno is now available in English

20-06-2013

The PR20HE amplifier kit with KT120 valves is cheaper now.

4-7-2012

Modern Valve Electronics masterclass DVD's in three languages.

27-2-2012

Trafco manufactures and delivers Vanderveen toroidal transformers for East Europe.

13-2-2012

New advanced miniature electronic chokes, the MEC-50 and MEC-100.

26-1-2012

The price of the auto-bias unit is raised due to a new interlink cable.

5-9-2011

New AMPLIMO website: www.ringkerntrafo.nl

15-5-2011

New AES paper from Menno about micro detail losses inside audio transformers... download here.

26-4-2011

New protection for the E-choke. read more....

20-1-2011

The VDV-GIT80 and VDV-POW80 are in stock again.

12-1-2011

My 2011 January AudioXpress article has incomplete figures. Download the complete article here (pdf).

10-1-2011

Modification kit MCM-MOD-1 not available anymore. .

4-1-2011

Vanderveen-Tentlabs improved 2011 auto-bias module.

22-12-2010

USA dealer Xerocomm can not be reached anymore. Contact Vanderveen directly for your orders.

21-10-2010

VDV-GIT80 and VDV-POW80 are timely not on stock. for more info.

29-9-2010

Record buffer for the MCML05.

15-9-2010

New German Language Masterclass DVD "Audio-Röhrenverstärker 2".

15-9-2010

New book "Design valve amplifiers" in German and Dutch available.

15-9-2010

Book "High-end Valve Amplifiers 2" English version is now available.

7-9-2010

Worldwide addresses for ordering Vanderveen products.

15-4-2010

New DVD's of Masterclasses by Menno in English and German languages.

8-12-2009

New (second) modification of the MCML05 line stage

28-10-2009

Measurements on E-choke improved (thanks to Burkhard Vogel).

13-5-2009

Vanderveen Electronic Choke.

2-4-2009

Impressive MCML05 improvement with the MCM-MOD-1.

26-1-2009

PR20HE amplifier available in DIY KIT... read more...

6-1-2009

New information about Vanderveen 2009 Valve Masterclasses in Germany .... click here.

22-12-2008

German version of Menno's first book now as e-book available, click here.

22-12-2008

New valve-amp Masterclasses in Birmingham 2009, click here.

3-6-2008

Auto-bias largely improves base response and micro details reproduction.

2-6-2008

Improved drive of power valves in UL40-S2.

21-5-2008

New research from Menno and Hans about distortions in capacitors.

24-4-2008

DVD of valve masterclass by Menno van der Veen (Dutch language) is available.

15-4-2008

Click here for info about tube workshops in Vienna and Luzern.

3-4-2008

Complete application note auto bias unit is available now.

22-2-2008

Change the UL40-S2 into the UL40-S2P power amplifier.

18-1-2008

Two AES-papers from Menno (& Pierre) are added to publications.

29-11-2007

Tentlab and Vanderveen proudly announce their new advanced auto bias module.

28-11-2007

Vanderveen proudly announces the new all valve pre amplifier kit MCML05.

2-10-2007

How to build the PR20HE-S2 valve amplifier.

03-9-2007

Masterclasses in Germany with Rainer zur Linde, www.elektor.de

03-9-2007

High-End Röhrenverstärker" (German language) soon available: www.elektor.de

21-2-2007

Masterclass Valve Amplifiers.

19-2-2007

Price of the PR20HE-S2 is Euro 5980,- incl. VAT.

19-12-2006

The new PR20HE-S2 amplifier is published in the Elektuur Audio Special 1 and is in preparation for production.

6-12-2006

Starting December 5 2006 the prices of the POW80 and GIT80 have increased due to extra costs of materials (cupper) and improved manufacturing.

22-11-2006

Soon available, the Dutch language version of "High-End Valve Amplifiers 2" by Menno van der Veen.

25-8-2006

Pages 8 to 14 (chapter 3) of Menno van der Veen's Buizenboek-2 are now online.

11-8-2006

Pages 1 to 7 (chapter 3) of Menno van der Veen's Buizenboek-2 are now online.

21-7-2006

Pages 15 to 18 (chapter 2) of Menno van der Veen's Buizenboek-2 are now online.

30-6-2006

Pages 8 to 14(chapter 2) of Menno van der Veen's Buizenboek-2 are now online.

19-6-2006

Pages 1 to 7 (chapter 2) of Menno van der Veen's Buizenboek-2 are now online.

19-5-2006

MODIFY THE UL40-S2 STEP BY STEP

4-5-2006

THE CHALLENGE of The Vanderveen Project.

4-5-2006

Pages 22 to 25 (chapter 1) of Menno van der Veen's Buizenboek-2 are now online.

20-4-2006

THE MATRIX of The Vanderveen Project.

20-4-2006

Pages 15 to 21 (chapter 1) of Menno van der Veen's Buizenboek-2 are now online.

7-4-2006

Amplifiers 7-8-9: Single Ended with quiescent current compensation plus cathode feedback of The Vanderveen Project.

7-4-2006

Page 8 to 14 (chapter 1) of Menno van der Veen's Buizenboek-2 are now online.

24-3-2006

Amplifiers 4-5-6: Single Ended with quiescent current compensation of The Vanderveen Project.

23-3-2006

Page 1 to 7 (chapter 1) of Menno van der Veen's Buizenboek-2 are now online.

10-3-2006

Amplifiers 1-2-3: Single Ended with saturated OPT-core of The Vanderveen Project.

24-2-2006

Amplifier 20: High power push pull pentode with local cathode feedback of The Vanderveen Project.

10-2-2006

Amplifier 19: Push pull pentode with twice the output power of The Vanderveen Project.

10-2-2006

Page 23 to 25 (end of chapter 5) of Menno van der Veen's Buizenboek-2 are now online.

27-1-2006

Amplifier 18: Parallel Push Pull Pentode Amplifier of The Vanderveen Project.

27-1-2006

Page 17 to 22 (chapter 5) of Menno van der Veen's Buizenboek-2 are now online.

13-1-2006

Amplifier 17: Push pull triode cathode follower amplifier of The Vanderveen Project.

13-1-2006

Page 14 to 16 (chapter 5) of Menno van der Veen's Buizenboek-2 are now online.

30-12-2005

Amplifier 16: Triode push pull amplifier with cathode feedback of The Vanderveen Project.

30-12-2005

Page 11 to 13 (chapter 5) of Menno van der Veen's Buizenboek-2 are now online.

16-12-2005

Amplifier 15: Super Triode © push pull amplifier of The Vanderveen Project.

16-12-2005

Page 8 to 10 (chapter 5) of Menno van der Veen's Buizenboek-2 are now online.

2-12-2005

Amplifier 14: Pentode Push Pull Amplifier with Cathode Feedbackof The Vanderveen Project.

2-12-2005

Page 1 to 7 (chapter 5) of Menno van der Veen's Buizenboek-2 are now online.

18-11-2005

Amplifier 13: Super Pentode Push Pull Amplifier of The Vanderveen Project.

18-11-2005

Page 29 to 31 (end of chapter 4) of Menno van der Veen's Buizenboek-2 are now online.

4-11-2005

Amplifier 12: Triode Push Pull Amplifier of The Vanderveen Project.

4-11-2005

Page 22 to 28 (chapter 4) of Menno van der Veen's Buizenboek-2 are now online.

21-10-2005

Amplifier 11: Ultra Linear Push Pull Amplifier of The Vanderveen Project.

21-10-2005

Page 15 to 21 (chapter 4) of Menno van der Veen's Buizenboek-2 are now online.

7-10-2005

Amplifier 10: Pentode Push Pull Amplifier of The Vanderveen Project.

7-10-2005

Page 8 to 14 (chapter 4) of Menno van der Veen's Buizenboek-2 are now online.

23-9-2005

Part 8: Ordering transformers and the organization of The Vanderveen Project is now online.

23-9-2005

Page 1 to 7 (chapter 4) of Menno van der Veen's Buizenboek-2 are now online.

9-9-2005

How to build the universal amplifier of the The Vanderveen Project is online now.

9-9-2005

Page 22 to 27 (chapter 3) of Menno van der Veen's Buizenboek-2 are now online.

27-8-2005

The circuit diagram of the Project Amplifier is online now.

26-8-2005

Page 15 to 21 (chapter 3) of Menno van der Veen's Buizenboek-2 are now online.

1-8-2005

CHANGE OF ADDRESS INTO SASSENSTRAAT 21

18-7-2005

Part 5: The power transformer POW80 of The Vanderveen Project.

18-7-2005

Page 8 to 14 (chapter 3) of Menno van der Veen's Buizenboek-2 are now online.

1-7-2005

Part 4: The output transformer GIT80 of The Vanderveen Project.

27-6-2005

Page 1 to 7 (chapter 3) of Menno van der Veen's Buizenboek-2 are now online.

17-6-2005

Part 3: The Universal System (second section) of The Vanderveen Project

14-6-2005

Page 15 to 18 (end of chapter 2) of Menno van der Veen's Buizenboek-2 are now online.

3-6-2005

Part 3: The Universal System (first section) of The Vanderveen Project

30-5-2005

page 8 to 14 (chapter 2) of Menno van der Veen's Buizenboek-2 are now online

20-5-2005

Part 2: Introduction into the Universal System of The Vanderveen Project

19-5-2005

page 1 to 7 (chapter 2) of Menno van der Veen's Buizenboek-2 are now online

6-5-2005

Part 1: The philosophy of The Vanderveen Project

22-4-2005

Third announcement of The Vanderveen Project

12-4-2005

page 22 to 25 (end of chapter 1) of Menno van der Veen's Buizenboek-2 are now online.

30-3-2005

Second announcement of The Vanderveen Project

29-3-2005

page 15 to 21 (chapter 1) of Menno van der Veen's Buizenboek-2 are now online

14-3-2005

First announcement of The Vanderveen Project

11-3-2005

page 8 to 14 (chapter 1) of Menno van der Veen's Buizenboek-2 are now online

28-2-2005

page 1 to 7 (chapter 1) of Menno van der Veen's Buizenboek-2 are now online

24-1-2005

About the proofprint of Vacuum Tube Book-2
Last year I have published at my site the chapters 1-5 of my new book. These chapters contain the theory for the chapters following with practical applications. The new chapters are still unfinished and therefore not ready for publication. To fill the gap, the publication of the chapters 1-5 will be repeated. This will give me the extra time to finish my research and writing. Thank you for your understanding.

24-1-2005

page 23 to 24 (end of chapter 5) of Menno van der Veen's Buizenboek-2 are now

10-1-2005

page 20 to 22 (chapter 5) of Menno van der Veen's Buizenboek-2 are now

29-12-2004

Important screen grid modification

27-12-2004

page 17 to 19 (chapter 5) of Menno van der Veen's Buizenboek-2 are now

13-12-2004

page 14 to 16 (chapter 5) are now online

30-11-2004

Improvement in the UL40-S2 Super-Triode modification !

30-11-2004

page 11 to 13 (chapter 5) are now online

15-11-2004

page 8 to 10 (chapter 5) are now online

15-11-2004

mistake removed in figures 4 and 5 of UL40-S2 modification

11-11-2004

Modify the UL40-S2 into a Super-Triode amplifier

1-11-2004

page 1 to 7 (chapter 5) are now online

21-10-2004

page 29 t/m 31 (chapter 4) are now online

4-10-2004

page 22 t/m 28 (chapter 4) are now online