Part 6: The universal amplifier of The Vanderveen Project
The figure on your screen probably will be too small to clearly see all the details. Click here to download the schematics as a full page pdf-file. Save this file on your computer, it will be often used.
Read more …Part 6: The universal amplifier of The Vanderveen Project
Part 7: How to build the universal amplifier of The Vanderveen Project
Everyone is free to construct The Project Amplifier as he/she likes, but maybe it helps when I tell how I did it. The next part in two weeks will reveal the details of how to order the special transformers and how the project will proceed.
Read more …Part 7: How to build the universal amplifier of The Vanderveen Project
Part 8: Ordering transformers and the organization of The Vanderveen Project
The transformers of the project can be ordered now. The prices mentioned at "order" are without VAT and packaging and transportation. Starting December 5 2006 these prices had to be increased due to extra material costs (cupper) and improved manufacturing. You can order by email at
Read more …Part 8: Ordering transformers and the organization of The Vanderveen Project
Amplifier 10: Pentode Push Pull Amplifier
I do have good reasons to start with amplifier 10 and not with amplifier 1. Everyone knows the old fashioned push pull pentode amplifier and therefore it is a good starting point. How to wire the wire boards is drawn in the standard form, which you can download by clicking 
here (form-10.pdf). The complete schematics of amplifier 10 is shown below. The high voltage supplies Vht1 and Vht2 are in parallel, together delivering a 370 V. Click the circuit diagram for full page view.
Amplifier 11: Ultra Linear Push Pull Amplifier
Inside amplifier 11 we apply local feedback at the screen grids. They are connected to taps at the primary and receive 1/3 of the alternating voltage at each corresponding anode. This local feedback lowers the amplification factor of the power tubes. Details of the circuit are shown below, while the standard form (click here) contains all the measurement results.