QED amplifier

I am a fan to british amplifiers. Onix and Tony Brady. Exposure and John Farlowe.I d like to know who created qed amplifiers like the a240sa or the 270.

Is it possible to have a contact with the engineer who created led amplifiers ?
 
The QED A240CD amplifier which I passed on to my son to use in his video production is still functioning perfectly - a tidy and reliable design.

QED was founded by Bob Abrahams and Ian Vine in 1973.

I read that Russ Andrews was involved in the design of their amplifiers.

In the early eighties, Russ was involved in developing QED products including amplifiers, tuners, turntables, cartridges and loudspeakers.
My source of information is: Russ Andrews - Hi-Fi mains and cable specialist