means “Messtechnik + Elektronik Waiblingen”.
A very small manufacturer which only
produced 60 units of this integrated amp which uses 18 tubes (world record?)
and 2 transistors (for the microphone preamp).
This amp is very, very hard to find and was designed with very few
compromises and according to the latest technologies of the 60s
(unfortunately printed circuit boards were modern and used in this amp).
There is even a choke for the DC filament heating of the
most interesting thing on this amp is the circuitry. This is the only
classic German hifi amp using a “PPP” output
stage (de Cneudt, Belgium - in German also known as the “Pickie
Markovski” circuit). No real output transformer,
“only” a coil (“Autotransformer”) with the output taps and – in series - the
output tubes connected through a capacitor. In turn this requires a power
transformer with 4 secondary windings for B+ and another one for the driver
stages. So, where is the benefit?
input and control section is pretty similar to the K+H
Telewatt VS71/110 and offers the same (unnecessary) tone controls,
filters and switches. To maintain the gain the signal has to pass through 13
tube sections when you listen to phono… And then
goes into the PPP output stage… As the Telewatt
the PIC-35 allows to connect a remote control for volume, but here it can
not be used as power amp input (as possible with the
Telewatt), as it is located in the middle of the preamp (before some
switches and the tone controls).
the original case and EL34 tubes the amp gets pretty hot when operated. This
way many owners got their amps converted to work with EL503. These have
lower plate dissipation and do not get so hot, but are really hard to find