RM BLA600 – Wideband HF 1.8-55 MHz Linear Amplifier


The BLA-600 is a compact 500 W transistor power amplifier for shortwave with built-in power supply. The amplifier works fully automated, no tuning required. Badfilter for all bands from 6 to 160 m are selected automatically.


The BLA 600 is a wideband compact linear amplifier for the HF bands and 6m, from 1.8 to 54 MHz. The BLA 600 is a 230 V AC amplifier, (configurable also for 115 and 240 V AC), The BLA600 is a 500 W solid state linear amplifier compatible with all modern transceivers. It features automatic band selection. HF & 6m coverage, 3 antenna outputs that can be assigned by the user to one or more bands. This amplifier features an illuminated display that shows the operating status, and two cooling fans located in the front of the amplifier.



The BLA-600 utilizes up-to-date NXP/Freescale MRF6VP5600H modules for power generation. These modules use 50 V supplies to achieve the best linearity and distortion free signals. The amplification factir is typicalyl 14 dB, a driving power of 20 to 5W is sufficient on 10 to 80, 30 to 40 W are required on 160 and 6 m. The amp works with all current transceivers, the PTT keying can be selected from various methods to accomodate keying against ground, open collector systems etc. For a noiseless transmit/receive switching the BLA-600 uses pin diodes, this enables even QSK operation at higher telegraphy speeds.

A 16×2 LC display shows the operating state of the amplifier, further LED bars show the output power level. Various protection circuits monitor several parameters, for example current intake, voltage, SWR, temperature, fan rotation etc. This ensures that the amplifer protects itself even when the antenna is malfunctioning. The BLA amp has three separate antenna connectors which can be assigned to different bands and which will be selected automatically. The built-in power supply can be adjusted to various input voltages, this makes this amplifier useful for international use, for example at DX-peditions.


  • Frequency: 1.8 – 30 MHz & 50 – 54 MHz
  • Power Supply: 110 – 230 – 240 V AC (Configurable)
  • Input Power: 20 – 25 W for 500 W O/P 80 – 10 m | 30 – 40 W for 500 W O/P 160 m & 6 m
  • Output Power: 500 W + PEP P1dB
  • Input VSWR: 1.1 – 1.5:1
  • Dimensions (L x W x H): 430 x 324 x 142 mm
  • Weight: 21.5 Kg

Additional information

Weight 22 kg