Looking for a reliable RM amplifier that delivers top performance? The RM KL-703 is a professional linear amplifier with a maximum transmit power of no less than 500 watts. Specifically designed for use in the 25-30 MHz spectrum , this amplifier is the ideal choice for serious HF users who require power, control, and reliability.
The KL-703 operates on 12V and features four 15A automatic fuses for maximum safety . Thanks to its flexible power settings—from just 1W to 35W input —you can tailor the output to your specific transmission needs. The three power levels (LOW, MID, HI) are easily adjusted via the front switch, giving you maximum control at all times.
What makes this RM linear amplifier unique?
- High transmission power up to 500W for powerful HF transmissions
- Adjustable input from 1 to 35W, suitable for all transmission modes
- Built-in RX preamp for better reception of weak signals
- Two fans and robust cooling fins ensure excellent heat dissipation
- Compact and robustly built, ideal for mobile or fixed use
Smart power, sustainable use
The RM KL-703 is designed for long-lasting performance. Its intelligent power management prevents overheating and maintains a clean signal, even during intensive use. The amplifier works best at around 400W output with an input of 25-30W – perfect for a stable connection without overloading the transistors.
Note: The amplifier does not have automatic protection against excessive input or incorrect antenna tuning. Therefore, always ensure a correct VSWR (<1.5:1) and use a suitable 50-ohm antenna for optimal performance.
Please note: This amplifier does not come with an RM DC power connector (connection block); you can order one separately.
Manual and information
Under the "Manual" tab on this page you will find, if available, the manual or a data sheet for the product.
Reliability first
Whether you work daily on SSB, CW, or FM, the KL-703 delivers consistently reliable performance. Thanks to the integrated RX preamplifier, you can receive even the weakest signals clearly. The amplifier is designed for use in demanding conditions – exactly what you would expect from an RM linear flagship.
Please note: The use of linear amplifiers is subject to specific laws and regulations that may vary from country to country. It is the user's responsibility to know and comply with these regulations. The dealer and manufacturer accept no liability for unauthorized use.
Ready to take your transmitter to the next level? Order the RM KL-703 today and experience the power of a professional linear amplifier!
Why Deltron?
💚 18 years of experience in communications equipment and accessories
Our knowledge is your security. Since 2007 we have been helping professionals and enthusiasts with reliable solutions.
💚 Fast delivery from stock. Ordered today = fast delivery. No waiting time, but certainty.
💚 100% original A-brand products. At Deltron you only buy original, certified products from renowned brands - no counterfeits, no worries.
💚 Buy on account for business customers (B2B). Easy and trusted payment via invoice. Specially for companies and governments.
💚 Pay afterwards or in 3 installments with Klarna and iDeal-in3. Order safely and quickly online at Deltron and pay afterwards with Klarna or choose iDeal-in3 and pay in 3 installments without interest and BKR registration.
💚 Certified webshop with reliable reviews. Deltron is Webshop Keurmerk-certified and reviewed via Trustpilot - so you can be sure that you order safely and reliably.



