As a suitable supplement to my new Elecraft KX2, I built myself a 10Watt 144/28 MHz transverter. Wolf, DK1HW gave me the tip to order the ready assembled board from www.transverters-store.com for
30 USD + 7 USD shipping. For the operation you need an ATTENUATOR BOARD for only 10 USD additional.
I have developed my own board with HF VOX and other helpful extras. In the housing, the transverter weighs only 160gr. The power supply is a clone of the KX2 Lithium Pack.