Transistor linear amplifier for QRP rigs

Somewhen more power is required, e.g. at times of declining sun spot activity. The PA show here is ideally suited for QRP rigs like FT-817, IC-703, K2, SG-2020 etc.

HLA-305V, Transistor KW-PA 160-10m, 250 Watt

HLA-305V

The HLA-305V operates from 1.8 - 30 MHz and its output power is 250W, with an input power of 1-10 Watt. There are 6 filters built-in to suppress harmonics, which are switched automatically but can also be switched manually for special operating conditions.

At the front panel there is a switchable input attenuator as well as a LC-display which can show input power, output power, heat sink temperature or output SWR. The intensity of the background light is adjustable. The CPU monitors input power, temperature and VSWR. Any error status are saved so that the manufacturer or authorised reseller can read them out for diagnose purposes. The PA has a PTT input (use for SSB recommended), but also a built-in HF-VOX.

For optimal heat distribution the PA transistors are mounted on a large copper heat spreader (200x60x3mm). The HLA-305V has an oversized heatsink with two temperature-controlled fans and therefore remains cool during operation. The DC cable is removable.

For operation the PA requires 13.5V at max. 34A, dimensions are about 240x420x80 mm and weight 4,3 Kg.

Order No.
HLA-305V KW Power Amplifier 250 W with Fans 669.00 € Buy now
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HAL-1200 MKII: Transistor KW-PA 160-6m, 1200 Watt

HAL-1200 MKII

This KW Transistor-PA is 'as light as a feather'. The HAL-1200 produces 1200 W PEP from 10-75 input power (45 W typ.) on 160-10m and at least 600 W PEP on 6m.

The device is processor-controlled and therefore has all the abilities this technology offers: the processor provides automatic band switching, transmitter/receiver switching without power to conserve relais contacts, controls the input attenuators (ALC is not needed) and monitors all operating states of the PA, of course.

The LC-display with background light shows operating states of the PA (Ready, Standby, On Air, Protect, Warning) as well as input and output power, SWR, temperature and so on. The firmware of the processor can be updated for future add-ons, such as an automatic antenna tuner that is planned.

The PA provides seven automatically switched, 5-pin output filters. The PA transistors are run with 50V and therefore very linear. The far range power supply for 100-260V~ is built-in.

This compact PA (260x330x150mm) weights with power supply only about 9 Kg, which also makes it predestined for DXepidtions.

The new version 'MkII' of the HAL-1200 amplifier has been improved in some details. For example the cooling system could be improved while lowering the noise level. Some design details have been changed to give the amp a fresher look, and internally some minor changes were introduced. The overall characteristics and operating procedures have notchanged in comparision to the previous version.

Order No.
HAL-1200 MkII: Shortwave /6m Amplifier 1200 W 2739.00 € Buy now
40062.15M 15-pin connector (Male), suitable for HAL-1200 2.80 € Buy now
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HLA-150Plus / HLA-150V-Plus / HLA-300V-Plus


Shortwave Power Amplifiers 150/300Watt
Compact and handy linear power amplifiers for all HF bands from 1.8 to 30MHz, with approx. 150 or 300 W output power. These amplifiers work real linear amplifiers and not as a C class device, as many simple CB type amps do. A special feature the amplifiers have a six-way output low-pass filter, which is switched automatically by micro processor. Additionally this filter can be switched manually (e.g. when receiving).

The relative output power is shown on a bar graph on the front panel. The amplifiers have a protection circuit against high SWR. Transmit/Receive switching can be done either be HF Vox or a PTT cable. The controls on the front panel allow a selection of the Vox hold time, additionally a 3 dB input attenuator can be selected, which reduces the amplification by about 50%.

Connectors: IN/OUT 2x PL, PTT: cinch socket, active low.
The model HLA-150V-Plus has two temperature controlled fans, good for continous operation. The model HLA-300V-Plus has three temperatur controlled fans. On high frequencies the output power is slightly reduced, the model HLA-300V-Plus reaches approx. 250W.

Weitere Daten:
Model HLA-150-Plus HLA-150V-Plus HLA-300V-Plus
   
Frequency Range 1.8 - 30 1.8 - 30 1.8 - 30 MHz
Operating Voltage 12 - 14 12 - 14 12 - 14 V DC
Power consumption 24 24 40 A
Input Power 1 - 10 1 - 10 1 - 15 W
Input Power SSB 2 - 20 2 - 20 2 - 20 W
Output Power typ. 150 150 300 W
Temp. controlled Fan No Yes, 2 Yes, 3  
Fuses 2 x 12 2 x 12 4 x 12 A
Dimensions 191 x 290 x 66 191 x 290 x 80 191 x 450 x 80 mm
Weight 1.8 1.9 3.3 Kg
Price 325.00 € 355.00 € 460.00 €
Order No.
HLA150-PLUS HF Amplifier 150 W w/o ventilator 325.00 € Buy now
HLA150V-PLUS HF Amplifier 150 W with ventilator 355.00 € Buy now
HLA300V-PLUS HF Amplifier 300 W with ventilator 460.00 € Buy now
SPS-1050S Power Supply 50A, suitable for HLA300V-PLUS and other amps 199.00 € Buy now
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Download: Instructions HLA-150-Plus (PDF, IT/EN, 230B)
Download: Instructions HLA-150V-Plus (PDF, IT/EN, 190KB)
Download: Instructions HLA-300V-Plus (PDF, IT/EN, 130KB)

BLA-350: 300 W Transistor Amp for HF with built in power supply


BLA-350 BLA-350

In contrast to many small amplifier for 12V operations, the BLA-350 is an mosfet-amplifier for your station desk. It covers all HF bands from 1.5 to 30MHz and all modes (SSB, CW, AM, FM) and is well suited for QRP transceivers like FT-817, IC-703 etc., but also to get more power from 100 W class transceivers, which can then be operated with a lower output power.

Manally switched low pass filters care for a good suppression of harmonics. Of course the amplifier does not need and heat-up time, and except for then band selection no tuning is required. The max. output power is 300W, with a max. allowed input power of 14 W with the input attenuator switched on. An LC Display shows various operating parameters.

The amplifier BLA-350 has an ALC output and a PTT input for transceiver connection, but can also be operated by HF vox. The coaxial connectors are SO-239 sockets (PL sockets). The built-in power supply is suitable for use with voltages from 200 to 250V AC. Multiple protection circuits support trouble free operation: automatic switch-off at too high SWR or too high temperature.

Additional technical data

  BLA-350
Output power 300 W ± 1dB
Frequency Range 1.5 - 30MHz
Input Power 12 W (typ), 14 W max.
Output impedance 50 Ω
Operating voltage 200 — 250V AC
Power consumption max. 800 VA
Fan internal
Dimensions 355 x 155 x 270mm
Weight 13 kg
Order No.
BLA-350 300 W Transistor Amp with power supply 715.00 € Buy now
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Ameritron 500 W Transistor PA


Bild ALS-500MXCE

Compact solid state amplifier for 12V supply, suitable for mobile/expedition operations. Output power 500 W PEP, 400 CW. No tuning required, just switch on and go. Electronic protection against high SWR and over temperature. Power consumption about 80A peak at 14V, separate supply lines 4A for control electronics. Temperature controlled fan, transistors used: 4x 2SC2879. Weight only 3.5kg, size 9 x 22 x 38cm.

Order No.
ALS-500MXCE 1195.00 € Buy now
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Cinch (RCA) cables for PTT and ALC, please see Cables and accessories.