Built in February 2007, it takes about 4w input and transmits 60w out using a single BLW60c RF power transistor. The kit was designed by Anthony Nailer G4CFY. It comes with a die-cast box with a LED and is either on or off with no other controls. The amp worked first time, was easy to build and align and is well within intermediate level construction skills.
I found soldering difficult visually because the PCB is tinned and very reflective. I would have prefered more details about how a kit works (Walford kits are a particularly good example of this). Harmonics were tested and found to be good at better than -50dB. However with Classic FM being on 101MHz this is quite a challenge for 6m. I put a couple of ferrite beads on the +13.8v line as connects to the board and will try further measures to reduce that harmonic further.
See Anthony's web page below and look for TA6SB kit. If it doesn't show try http://www.spectrumcomms.co.uk/amateur.htm
