Linear Amp Gemini 4 – 50/70MHz DUAL BAND 300W Solid State Linear Amplifier

  • DUAL BAND Operation on 50Mhz and 70MHz
  • Solid state design
  • 300W output (270W on 50MHz)
  • Freescale MRFE6VP6300H LDMOS
  • Integral 50V Linear Power supply
  • Drive requirements 2.5/10/25W (specified at purchase)
  • Advanced cooling for MGM operation
  • Full protection for overdrive/swr/temperature
  • N Type connectors on input and output
  • Rear panel SMA 0dBm predistortion linearisation output option
  • All aluminium chassis
  • Compact dimensions – just 270w x 300d x 120h mm
  • Weighs just 10Kg
  • UK Manufactured by us here on the Welsh Borders

Price excl VAT: £749.17
incl VAT: £899.00


Designed, manufactured and assembled entirely the UK, the  GEMINI 4 linear amplifier is a solid state DUAL BAND linear amplifier with 300W output on 70MHz and approx 270W on 50Mhz

The amplifier can now also be specified with a rear panel 0dBm SMA socket for predistortion linearisation for use with the latest generation of SDR’s.

Designed to fill a market gap between the low power outputs of transverters and smaller rigs and the 1kW plus amplifiers that not all users want or can afford the Gemini range combines low drive requirements with instant on solid state performance in a compact stylish package.

The Gemini RF section uses the Freescale MRFE6VP6300H LDMOS device for high performance and maximum ruggedness. This, combined with built in protection for overdrive, high SWR and over temperature ensures solid reliable performance at high outputs for long periods. The unique RF design architecture has resulted in fully automatic DUAL BAND capability giving both 50-54MHz and 69-72MHz coverage without any external bandswitching.

Furthermore GEMINI is a complete turnkey solution incorporating a complete 50V linear power supply so no external PSU is required.



Frequency coverage 50-54MHz and 69-72 MHz
Power output @ 1dB compression 300W (270W on 50MHz)
Power output @ -30dB IMD3 >250W (220W on 50MHz)
Input power 2.5/ 5 / 10/25W (specified when ordered)
Spurious outputs <-70dB wrt 300W
Input return loss >13dB
Efficiency (RF) >65%
RF Device 1 x Freescale MRFE6VP6300H
Protection Overdrive, SWR, Over Temperature
Relays Coaxial Output
Metering RF output
Power requirements 230V AC  50/60Hz
Dimensions mm 270w x 300d x 120h
Weight 10Kg



Linear Amp Gemini solid state amplifier internal view


Linear Amp Gemini 4 70MHz solid state amplifier rear viewGemini 4 at 250W output for 2W drive

Download a brochure HERE

Available on back-order

Input Drive Level Required  

Rear panel 0dBm SMA output

Mains Input Voltage

Front Panel Colour