Owner manual

LYDKRAFT ApS
Mose Allé 20, DK2610 Rødovre
Denmark
1
TUBE
-
TECH EM 1A
Program equalizer Module
DESCRIPTION
The
TUBE
-
TECH program equalizer EM 1A
contains a passive filter and a tube (va
lve)
based amplifier to restore the loss from the filter.
The filter has a low frequency boost/attenuate section with 4 selective frequencies, a high
frequency boost section with a variable bandwidth and 10 selective frequencies and a high
fre
quency atte
nuation section with 3 selective frequencies.
The filter is placed directly after the input transformer there
fore eliminating noise from the
amplifier when boosting either low
-
or high frequencies.
The amplifier consists of two tubes (valves) in push
-
pu
ll con
figuration (one ECC 83 as the
pre
-
amp and phase splitter, and one ECC 82 as the output stage),
and an output
transformer.
Both input and output are balanced and fully floating.
The in/out key switches the filter in and out without clicks and chang
es in level, while the
amplifier remain in the signal path.
The power supply for the pre
-
amp and phase splitter are stabilized and the heaters of both
tubes (valves) are fed with a stabilized DC voltage.
The whole amplifier (including input and output tr
ansformer) and the power supplies are
placed on one PC
-
board.
(071221)