Elad FDM DUO sdr 6m amp test B.N.O.S 6M AMP 50WATT OUTPUT

Hi grabbed this amp at a ham fest for my Elad fdm duo while 5 watts is ok and i have worked vk to zl (1800 klm) with 5 watts on 6m 45 or 50 watts is better. its an old british amp they are sensitive and will cut out at high swr but it seem to work even on my yu7ef 5 element yagi @ 52 mhz where i can transmit on 6m. the pre amp is similar to a cb amp pre amp more testign later 73 vk3meg