Rupert Neve Portico 5024 - Quad Mic Amp User Manual
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Portico 5024: Quad Microphone Amplifier
Thank you for your purchase of the 5024 Quad Mic Amp. Everyone at Rupert Neve Designs hope you
enjoy using this tool as much as we have enjoyed designing and building it. Please take note of the fol-
lowing list of safety concerns and power requirements before the use of this or any Portico
Series product.
Safety
It’s usual to provide a list of “do’s and don’ts” under this heading but mostly these amount to common
sense issues. However here are some reminders:
The Portico 5024 dissipates about 15 watts, which means that it will get warm in use. The heat generated
is radiated through the case work. To avoid overheating Portico™ modules should not be stacked imme-
diately above or adjacent to other equipment that gets hot. Also bear in mind that other equipment may
radiate strong hum fields which could spoil the performance of your Portico module.
Don’t operate your Portico™ module in or around water! Electronic equipment and liquids are not good
friends. If any liquid is spilled such as soda, coffee, alcoholic or other drink, the sugars and acids will
have a very detrimental effect. Sugar crystals act like little rectifiers and can produce noise (crackles,
etc.). SWITCH OFF IMMEDIATELY because once current starts to flow, the mixture hardens, can get very
hot (burnt toffee!) and cause permanent and costly damage. Please contact support as soon as possible
at [email protected] for resolution.
Don’t be tempted to operate a Portico module with the cover removed. The cover provides magnetic
screening from hum and R.F. stray fields.
Power Requirements
Each 5024 unit has a high quality, low noise switching power supply that is further filtered and shunt
regulated for an exceptionally quiet and reliable power source for the audio circuits. The power sup-
ply is considered “universal” in the sense that it will accept 100V through 240V AC and complies with
standard mains voltages around the world. Be absolutely sure to disconnect mains power (remove
the power cable from the IEC power connector at the back panel) before checking the fuse. The fuse is
located in the IEC power input connector and is accessed by opening the small panel labeled “FUSE”.
The fuse should always be replaced with the correct value and type. The 5024’s power supply requires a
5x20 mm 2.5 amp fast acting ceramic body fuse Bussman type GDA 2.5A or equivalent.