Been given one of these with a known issue to use as a Rx'r , works fine too . Decided to take a look at it and now having trouble sourcing the PA transistor pictured , it looks like the markings are AFT05MP075W maybe , in the mean-time after removing said magic-less smoke device i inserted a ceramic cap from the output of the driver to the input of the band-pass filters/network (where the output of the final is) and there is around 4W going up the coax . Sent QYT a email and looked big-time on the internet , nothing hence this post , anyone see one like that? , its supposedly a 75w vhf / 55w uhf transistor , there are those others that turn up on a search BUT not that style . tia & cheers , Paul .