TekShack LD500-MOS Linear Amplifier

Built in the USA by Rocketbox, the TekShack LD500-MOS is a rugged low drive CW transmitter engineered for high-efficiency RF transmission across 26–30 MHz. This 500-watt amplifier is designed for export, industrial, and scientific applications, offering stable performance with selectable power levels and a built-in preamp.

The LD500-MOS is compatible with AM, FM, SSB, and CW modes, and operates on a 12–14.5V DC power supply with a 50A current draw. The unit requires a dead key input of 2–4 watts and allows a maximum PEP swing input of 15 watts. A well-tuned antenna with an SWR of 1.5 or less is mandatory for safe and effective operation.

Specifications  
- **Frequency Range:** 26–30 MHz  
- **Power Supply:** 12–14.5 VDC (Do not exceed 14.2V)  
- **Current Draw:** 50 Amps  
- **Input Power:**  
  - Dead Key: 2–4 watts  
  - Max PEP Swing: 15 watts  
  - Max SSB Input: 20 watts  
- **Output Power:** Rated for 500 watts  
- **Operating Modes:** AM, FM, SSB, CW  
- **SWR Requirement:** 1.1 to 1.5 or less  
- **Connections:** Red = Hot, Black = Ground  
- **Warranty:** 2-Year Manufacturer Warranty (Transistors not included)  

Key Features  
- • 500W low drive transmitter for serious RF applications  
- • Includes built-in preamp and 3 selectable power settings  
- • Supports multiple modes including SSB, CW, AM, and FM  
- • Durable, precision-built  
- • Final-sale only with manufacturer-direct warranty support  

**Important Use Restrictions:**  
- For industrial, scientific, medical, or export use only  
- Not legal for use on CB or Amateur bands in the U.S.  
- All sales are **final** – no returns or exchanges  
- Use a proper SWR meter and tune the antenna before operation  
- DO NOT exceed 14.2V supply voltage  
- Always modulate the transmitter to full power before adjusting SWR  

The LD500-MOS delivers the performance, build quality, and control flexibility required by professionals needing clean, stable high-output RF transmission.