Overview
The Model 158 Broadhead RF Power Supply is a broadband, low-frequency RF drive system engineered for ultra-high mass ion transmission. Based on the proven Model 151 RF Power Supply architecture, the Model 158 extends operation into dramatically lower frequency ranges to support ion transport at m/z values in the millions to hundreds of millions of Daltons.
As analytical systems push into megadalton regimes and beyond, lower RF frequencies become essential for maintaining stable ion confinement. The Model 158 was specifically developed to meet this emerging need.
Key Features
- Broadband low-frequency operation for ultra-high m/z ion stability
- Demonstrated ultra-high mass transmission capability
- Model 151-based architecture with configurable high-voltage RF output
- Designed for high-capacitance ion transport structures and custom integration
Broadband Low-Frequency Operation
- Frequency range: 10 kHz to 500 kHz
- Requires external sine wave frequency source
- Optimized for ultra-high m/z ion stability
- Suitable for large ion funnels and RF-only ion guides
Ultra-High Mass Transmission Capability
- Demonstrated ion transport from hundreds of thousands to hundreds of millions of Daltons
- Stable confinement at reduced RF frequencies
- Designed for high-capacitance ion transport structures
Technical Specifications (Model 151-Based Architecture)
The Model 158 extends the proven Model 151 architecture into lower-frequency operation while preserving the core RF power and integration approach for demanding ion transport applications.
RF Output Characteristics
- Dual RF outputs, 180 degrees out of phase
- High-voltage RF output up to approximately 2,000 V peak-to-peak (configurable)
- Low-voltage command input: 0 to +5 V
- Linear amplitude scaling
- External DC offset capability (depending on configuration)
Load Compatibility
- Standard capacitive load range: 20 pF to 360 pF
- Extendable to greater than 1000 pF with factory modification
- Suitable for RF-only quadrupoles
- Suitable for ion funnels
- Suitable for multipole ion guides
- Suitable for custom high-capacitance structures
Control and Integration
- External frequency input (sine wave generator required)
- Rear-panel vacuum interlock input
- +5 V logic enable/disable control
- Optional fast on/off capability via interlock interface
Electrical and Mechanical
- Universal AC input: 100-240 VAC, 50-60 Hz
- Rack-mountable 19-inch form factor
- High-voltage rated MHV/SHV output connectors (configuration dependent)
- Designed for proper earth-ground chassis integration
Designed for Emerging Ultra-High Mass Applications
Traditional MHz-range RF supplies are optimized for small to moderate m/z ranges. The Model 158 Broadhead RF Power Supply fills the critical gap for systems targeting:
- Native mass spectrometry of large protein complexes
- Megadalton biomolecular assemblies
- Viral particles and macromolecular structures
- Ultra-high mass ion funnel systems
- Research platforms extending beyond conventional quadrupole limits