Amateur Radio 2m High Power 300W Amplifier v2 Assembled PCB

By popular demand, we have decided to make the Enigma 300W 2m V2 amplifier available to our customers as an assembled and tested version without a heatsink, for those that already have a heatsink or to save on postage cost.

The Enigma 2m 300W high power amplifier has excellent specifications. Using one of the new generation, highly rugged RF mosfet transistors at its core, the design has several features not offered by other similar products.

Supplied with comprehensive instructions, this amplifier is supplied fully assembled and tested, ready for mounting to a suitable heatsink. 

We recommend either the Enigma HS150 or HS200 which should be purchased in addition to the amplifier PCB  if you do not have a suitable heatsink available. A heatsink with a thermal resistance of at least 1.2º/W is recommended. 

Also available on a heatsink  here.

Features:

-Fully assembled kit supplied with high quality PCB

-Mixed use of through-hole and SMT parts. All SMT parts already professionally mounted

-High quality components used throughout

-Latest high-ruggedness MRFE6VP6300H RF mosfet

-High efficiency design

-Broadband, requires no tuning

-On-board low pass filter. Excellent spectral purity

-On-board directional coupler and precision thermistor for SWR and temperature monitoring

-Dual-mode bias shutdown facility with bias indication

-Suitable for FM & SSB

Specifications:

-Power Gain:  >22dB @48V/ 50mA bias (2W input required for >300W output)

-Efficiency: Approx. 70% @350W/ 48V

-Harmonic output: <-70dBc, 140-150MHz

-Current draw: Typical 10A at 48V

-Mismatch ruggedness: >SWR 65:1. Tested into open and short circuit loads at the output without damage.

-Size: 150 (L) x 75 (W) x 35 (H)mm (Completed PCB)