THE AMPLIFIER INSTITUTE

4 July 2011 Updated
The Design of Active Crossovers
OUT NOW

5 Mar 2015 Updated:
Electronics World Article Index

7 Jan 2016 UPDATED
The Wireless World Archive
Rumble filters added

16 June 2016 NEW
AES Powerpoint presentations

21 June 2016 Updated:
My articles etc


THE MUSEUM OF RETROTECH

21 July 2017 Updated
The Liquid Engines

28 Sept 2017 Updated:
Voicepipes & Speaking Tubes

5 Oct 2017 Updated:
Mercury engines

6 Oct 2017 Updated:
Rotary Steam Engines

12 Oct 2017 Updated:
Water Motors

15 Oct 2017 Updated:
The Hewitt Engine


UNUSUAL RAILWAY LOCOMOTIVES

7 June 2017 NEW
The Roadrail System

14 June 2017 Updated
Pearson's 9-footer

17 June 2017 NEW
The Rorailer Concept

27 Sept 2017 Updated
The Nichols boiler

7 Oct 2017 Updated
Strange chimneys

14 Oct 2017 NEW
The Druitt Halpin boiler