Ver. 1.1 - ©Phædrus Audio Ltd. 2011 All rights reserved.
A 12V AC supply is required for the Phædrus Audio PHAB, PHAME and PHI units. A direct current
(DC) supply is NOT suitable and will damage the unit. If a supply is sourced el sewhere than from
Phædrus Audio, it must have the following specifications:
•
12V AC, 12 Watt supply or greater (> or = 1000mA supply current)
•
Must be suitable for connection to the appropriate mains vol tage
•
Must be Class-II, double-insulated
•
Must have 30% regulation or better
•
Must contain one-shot thermal fuses, resettable fuses, or Polyswitches for over-current
protection.
UK and Euro units should comply with
EN 60950-1
and
CE
requirements and
only PSUs with UL
and CSA
approvals should be provided on North American units. Units supplied to other countries
should be verified to comply with the relevant standards which obtain in those territories.
User Access & Servicing
Phædrus Audio equipment employs thermionic valve (vacuum-
tube) technology and employs hazardous vol tages for the high-
tension supplies. THE USER SHOULD NOT ATTEMPT TO
SERVICE THE UNIT. ALL SERVICING SHOULD BE REFERRED
TO QU ALIFIED SERVICE PERSONNEL OR FACTORY ONLY.
The PHAB and PHAME preamplifiers and the PHI DI-Box should
NEVER be connected to the external power supply or in any
other way energised when the case is opened and/or the circuit board is accessible.
PHI – Exposed valve (vacuum tube) safety
The Phædrus Audio PHI DI-Box has an exposed 12AU7 (ECC82) valve (tube). In order to ensure
safety, in all circumstances - even if the glass envelope of the valve (tube) were smashed, the
exposed vol tages ensure touch-current is limited to a safe value. Nevertheless keep this product
away from babies, children and pets. DISCONNECT THE EXTERNAL PSU AND ALL OTHER
CONNECTED EQUIPMENT WHEN REPLACING THE VALVE (TU BE).
Ground (earth) issues
Phædrus Audio Ltd.'s PHAB, PHAME and PHI products are all powered by external (12V AC) power
supplies which should be double insulated, class-II types (see above). It should therefore be
appreciated that,
A CONNECTION TO EITHER THE PHAB, the PHAME of the PHI product CAN NEVER
BE RELIED UPON PROVIDE A PROTECTIVE OR SAFETY EARTH (GROU ND). This
advice obtains IRRESPECTIVE OF THE SETTINGS OF ANY "EARTH OR GROUND
LIFT" SWITCHES
.
General Safety Instructions
•
Do not operate Phædrus Audio equipment near any source of water or in excessively moist
environments.
•
Keep your Phædrus Audio equipment away from babies, children and pets.
•
Do not let objects do not fall, or liquids be spilled, into the enclosure.
