Description
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MKS RF AMPLIFIER 53-S23A-64
MODEL# 53-S23A-64
CUSTOMER PART# 4522 131 45827
RF DECK
MODEL# ARX-X282
POWER SUPPLY
MODEL# APX-X143
The amplifier is linear and fully automatic. It is capable of delivering up to 25 kW (64 MHz) or 15KW (42 MHz) into a load VSWR of 1.5:1. Typical gain at 25 kW output will be 74 dB; typical gain at 15 kW output will be 71.8 dB.
The amplifier consists of a four-stage solid-state preamplifier/driver followed by a two‑stage, grounded‑grid, vacuum-tube amplifier. The vacuum-tube stages provide approximately 25-dB gain. The balance is supplied by the solid-state preamplifier/driver.
All major functions are controlled and monitored by a microprocessor (uP) based control system. The uP provides amplifier and MRI system protection from excessive average- and peak-power operation. The amplifier is remotely controlled via a serial interface during normal MRI system operation.
PRODUCT DESCRIPTION
The models 53-S23A-64 and 53-S24A-42 are linear, pulsed, RF power amplifiers intended for use
as part of a Magnetic Resonance Imaging (MRI) system.
These models are Class 1, type B, ordinary equipment without applied parts. They are to be used
in an area where no flammable anesthetics or gasses are used.
Both models are UL Listed under UL 2601/ CSA 601 (file #E199620). Both have been
investigated for compliance with the International Electrotechnical Commission Standard for
Medical Electrical Equipment, IEC 601-1.
The individual amplifiers do not comply with EMC requirements until the unit is installed in the
MRI system. Verification of EMC compliance must be done after system installation.
Each amplifier must be enclosed in an outer cabinet when operated in patient vicinity.
SAFETY CONCERNS
The amplifier must be installed, operated, and serviced by qualified personnel.
The model 53-S23A-64 is capable of delivering in excess of 25,000 watts peak RF power at 64
MHz into a 50-Ohm load. The model 53-S24A-42 is capable of delivering in excess of 15,000
watts peak at 42 MHz. These power levels can cause severe RF burns and other injuries if
misused. Never operate the amplifier without properly terminating it with a suitable load.
The user accepts full responsibility for the proper use of the amplifier and for all safety issues
concerning the use of RF power for medical purposes.
SAFETY WARNINGS
LETHAL VOLTAGES ARE PRESENT INSIDE THE AMPLIFIER. DO NOT OPERATE
THE AMPLIFIER WITH THE COVERS REMOVED. CONSULT THE
MANUFACTURER BEFORE ATTEMPTING TO SERVICE THE AMPLIFIER.
DO NOT PLACE HEAVY OBJECTS OR LIQUIDS ON TOP OF THE AMPLIFIER.
DO NOT BLOCK THE AMPLIFIER COOLING AIR INTAKE OR EXHAUST PORTS.
UNITED RF, LLC IS NOT RESPONSIBLE FOR
INCORRECT INSTALLATION, APPLICATION, USE, OR FOR PATIENT SAFETY WHEN
THIS AMPLIFIER IS USED IN A MAGNETIC RESONANCE IMAGING OR OTHER
SYSTEM.
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