RM Italy BLA703 500W HF Base Station Amplifier 25-30MHz, CB & 10m, SMPS, VOX/PTT, 100-240VAC

The RM Italy BLA703 is a high-performance, 500W AC-powered base station linear amplifier for the 25–30 MHz frequency range — covering the CB 27 MHz and 10-metre amateur radio bands. Driven by as little as 1W and up to 35W input, it delivers a maximum output of 500W, making it compatible with virtually any CB or 10m transceiver. The switch-mode power supply (SMPS) accepts 100–240V AC worldwide, is both lightweight and highly efficient, and eliminates the need for a separate heavy linear PSU. A large heatsink with two cooling fans ensures quiet, reliable thermal management during extended operation. Harmonic output is greater than −50 dBc — no additional filtering required for FCC compliance. Comprehensive protection circuits guard against excessive input drive, high antenna VSWR, over-temperature, and out-of-band transmissions. Supports both VOX (with SSB delay) and PTT switching modes.

Key Features

• 500W maximum output power
• Frequency range: 25–30 MHz (CB 27 MHz & 10m amateur)
• Input power: 1–35W (all modes)
• Switch-mode power supply: 100–240V AC worldwide
• VOX (with SSB delay) & PTT switching
• Harmonic output: >−50 dBc — FCC compliant, no additional filtering required
• Protection: excessive input drive, high VSWR, over-temperature, out-of-band
• Large heatsink with dual cooling fans for quiet, reliable operation
• Input VSWR: 1.1–1.5:1
• Dimensions: 415 x 305 x 170mm (L x W x H)
• Weight: 13kg
• Made in Italy by RM Italy

Technical Specifications

• Frequency: 25–30 MHz
• Power supply: 100–240V AC (SMPS)
• Input power: 1–35W max (all modes)
• Output power: 500W max
• Input VSWR: 1.1–1.5:1
• Harmonic output: >−50 dBc
• Switching: VOX (with SSB delay) & PTT
• Dimensions: 415 x 305 x 170mm (L x W x H)
• Weight: 13kg
• Country of origin: Italy