RM ITALY - BLA600 - COMPACT LINEAR AMPLIFIER COVERING H.F. + 6 METERS BANDS (1.8-54 MHz) - OUTPUT POWER: 500 WATT

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

The BLA-600 utilizes up-to-date NXP/Freescale MRF6VP5600H modules for power generation. These modules use 50V supplies to achieve the best linearity and distortion free signals. The amplification factor is typically 14 dB: a driving power of 5 to 20W is sufficient on 10 to 80, 30 to 40W are required on 160 and 6m. 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 QSK operation even at higher telegraphy speeds.

A 16x2 LC display shows the operating state of the amplifier, and LED bars show the output power level.
Various protection circuits monitor several parameters: 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 on DX-peditions.

TECHNICAL SPECIFICATIONS

• Frequency: 1.8-30 MHz & 50-54 MHz
• Active Device: NXP / Freescale MRFE6VP5600H (50V)
• Output Power: 500W+ PEP P1dB
• Input Power: 20-25W for 500W O/P 80-10m 30-40W for 500W O/P 160m & 6m
• Power Gain: Typical 14dB +/- 1dB (80-10m)
• Output Harmonic / Spurious Distortion: HF >-45dB 6m >-60dBc
• Input: 50 Ohms Unbalanced UHF SO239 Female
• Input Matching: <1.5:1 VSWR (160-6m)
• Output: 3x 50 Ohms Unbalanced UHF SO239 Female
• Teflon Insulator, Gold plated terminal.
• Supply Voltage: 120 Vac +5-5%
• 230 Vac +6-10%
• 240 Vac +10-6%
• 50/60Hz 1200VA max
• AC Input Fuse: 5 x 20mm F LBC 250V (Fast Blow)
• 240Vac Supply 5A
• 230Vac Supply 6A
• 115Vac Supply 10A
• PA Current: 27A max (hardware protected)
• Metering: Drain Current (Id), Drain Voltage (Vd),
• Relative Output Power, Input Power (Pin),
• Relative Load VSWR, Heatsink Temperature,
• Transistor Temperature, PSU Temperature. 26
• PTT Input: Close to ground TX, Open Circuit RX,
• (Suitable for Open Drain / Collector / Relay switching)
• Output +5V S/C current <15mA in TX.
• ALC Output: Negative going voltage, (0 to –10V), Adjustable.
• Dimensions: 430mm x 142mm x 324mm (Width x Height x Depth)
• Weight: 21.5 kg

IN ORDER TO ELIMINATE ANY AMPLIFIED HARMONICS FROM THE TRANSMITTER WHICH COULD CREATE INTERFERENCE TO TVs AND OTHER DEVICES WE SUGGEST WITH EACH AMPLIFIER THAT OPERATES WITHIN 30 MHz THE USE OF AN ADDITIONAL LOW PASS FILTER SUCH AS OUR EXCELLENT 35/600 SHOWN BELOW AMONG THE ACCESSORIES

- NOTE: FOR THIS AMPLIFIER THE FILTER HAS TO BE REMOVED WHEN OPERATING ON 6 METERS