The 2 amplifiers pictured above are both fitted with my replacement block capacitor and other identical components including new valves ~ The amplifier with the replacement mains transformer now also had a faulty OPT which was temporarily replaced to match a pair I had just repaired for someone else so all 3 were closely matched apart from the new mains transformer and all tested and sounded similar The transformer was made by Majestic Transformers in Poole UK and was sized to fit the original case but it had been bolted directly to the chassis as pictured because it would not fit with the mounting cheeks in place I had supplied replacement block capacitors to the "repairer" of these amps and I was interested to see this new mains transformer which was causing the owner some concern Looking at the left hand side amplifier in the picture you would probably think the same thing The owner of an early pair of QUAD IIs was concerned that a repair to his amplifiers was "not quite right" The project pictured above and described below started when I was contacted and quizzed on how a modern replacement QUAD II mains transformer should or could be fitted Some transformer manufacturers offer replacement mains transformers and chokes for the QUAD II valve amplifier but there are few that make a replacement QUAD II output transformer (OPT) and only one I know which currently (Oct 2020) makes a replacement core that fits the original case (can) and performs better than the original or the new parts fitted in the IAG "quad classic" and its modern variants
~ QUAD II New Mains and Output Transformers ~
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