Recently I needed to "upgrade" my 23cm transverter to produce more power to drive my 400W+ 23cm amplifier. My present transverter was using one of the "older" generation mitsubishi modules that produce around 17W. I needed 50-60 W to drive my 8@XRF286 amplifier. Whilst a single XRF286 will produce this comfortably, it would require 28 V and I wanted the transverter to remain a 13.8 V ONLY unit for portability. About this time VK3PY (Carlo) had completed a 2 X Mitsubishi module 23cm amplifier that was delivering my exact requirements: 50-60 W. After a closer inspection of the amplifier I decided to build it. It features a single board with the appropriate splitters and combiners etched on the 1 circuit board.
Recently VK3PY's article was published in "AR" (the WIA's magazine) and a full description can be found here: (sorry - link not yet available)
Some photos of my completed unit appear below. The unit was attached to the top of my transverter and suitable connectors route the DC and RF to and from the main unit.
Anyone wishing an amplifier requiring little drive will find this a relatively easy and very reproducible design.
This Amplifier is based on the circuit board designed by VK3PY - Carlo Gnaccarinni