Linear Amp Gemini 23 – 1296MHz 250W Solid State Linear Amplifier

  • Solid state design
  • 250W output (1dB compression point >200W)
  • Integral 50V Linear Power supply
  • Drive requirements 8W
  • Advanced cooling for MGM operation
  • Full protection for overdrive/swr/temperature
  • Switchable preamp output voltage on RX with bias tee option
  • N Type connectors on input and output
  • All aluminium chassis
  • Compact dimensions – just 270w x 300d x 120h mm
  • Weight just 10Kg
  • UK Manufactured by us here on the Welsh Borders

Price excl VAT: £1,165.83
incl VAT: £1,399.00



Housed in the same chassis as the rest of the range the Gemini 23 RF section has been designed from the ground up to meet new standards in performance.

The Gemini 23 uses the latest NXP BLF6G13L-250P LDMOS device for high performance and maximum ruggedness.

A lot of hours have been spent designing the output filter network to provide the highest standard of harmonic rejection with minimal insertion loss. The Gemini 23 incorporates a LPF providing >70dB rejection of the 2nd and higher harmonics. A band stop filter active above 4GHz enhances this further. No other amateur 23cms amplifier can match this performance although it does come at the cost of very slightly lower power output and efficiency than less well considered designs. Excellent rejection of harmonic products is increasingly important, particularly with the current and planned intensive use of the 2.6GHz band by mobile phone systems.

This, combined with built in protection for overdrive, High SWR and over temperature ensures solid reliable clean signal performance at high outputs for long periods.

The 1296 MHz Gemini 23 incorporates a front panel switchable 13.8v preamplifier supply on receive. This can be selected by the operator to be either an output voltage on the rear panel or a coax bias-T feed as required.

GEMINI 23 is a complete turnkey solution incorporating an integral 50V linear power supply so no external PSU is required.


Frequency coverage 1275-1305 MHz
Power output @ 1dB compression >200W
Power output @ saturation up to 250W
Input power 8W
Spurious outputs <-70dB wrt 200W
Input return loss >20dB
Efficiency (RF) >45%
RF Device 1 x NXP BLF6G13L-250P
Protection Overdrive, SWR, Over Temperature
Relays Coaxial Output, on board input
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



Available on back-order

Mains Input Voltage

Front Panel Colour