CLEANING
The power supply and Nyquist are only to be cleaned with a dry cloth, such as microfiber. Please
disconnect power supply from the mains before cleaning either chassis.
“Wet” cleaning must be avoided! Liquids may cause a short circuit or other electrical hazard inside
Nyquist or power supply.
The glass top cover should not be removed while Nyquist is connected to the mains.
WARNING: Dangerously high voltages inside, risk of electrical shock!
Failure to follow these safety precautions will void the Manufacturer’s Warranty of Brinkmann
Audio GmbH.
WARRANTY
Brinkmann Audio GmbH warrants this product to be free of defects in materials and workmanship
for a period of three (3) years from the Date of sale. This warranty doesn’t cover shipping costs eit-
her to or from our company for repair purposes.
Repairs and changes to Nyquist should only be performed by Brinkmann Audio GmbH or by Brink-
mann-authorized service facilities.
Brinkmann Audio GmbH may not be held liable for costs of repairs performed by non-authorized
service facilities.
Unauthorized changes or modifications to the Product, as well as improper use and connection of
the Product will void the Manufacturer’s Warranty.
Repairs or modifications performed by non-authorized service facilities will void Manufacturer’s
Warranty.
ATTENTION
Digital components are sensitive and need to be powered off when connecting or disconnecting
other components. Should this be forgotten and lead to problems, please switch off Nyquist and
switch it on again when everything is connected properly.
TUBES
Nyquist utilizes four (4) NOS (New, Old Stock) Telefunken PCF803 tubes (two per channel).
The PCF803 was developed in the 60s for use in colour television.
The company “Telefunken” in Berlin was known for highest quality and durability of their products
and for using state-of-the-art technologies for their production.
Each tube contains two internal circuits: one pentode and one triode.
The PCF803 in the Nyquist D/A Converter are used for the output stage and the analog gain control.
The PCF803 was designed to last for a minimum of ten years of hard use in a colour TV. As Nyquist
does not stress the tubes to this degree, tube life expectancy is much longer. Brinkmann maintains
extensive stocks of this tube, so replacements are readily available. Do not use tubes from other
sources, replace with original Telefunken PCF803—preferably a matched set—which are available
from Brinkmann.
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