Stefan Dellemann (4)

1-01-2011 | There have of course been numerous designs for headphone amplifiers before this one, either more or less successful and simpler or more elab...

1-07-2006 | Short-wave listeners often are not able to, or allowed to, install a long-wire antenna or other large dimension antenna in or around the hom...

1-07-2005 | ‘Valve sound’ is not just an anachronism: there are those who remain ardent lovers of the quality of sound produced by a valve amplifier. Ho...

1-07-2003 | Most shortwave receivers for use ‘in the shack’ have a 50-Ohm coaxial input (usually a SO239 socket) which is not directly suitable for the...