Musical Fidelity Amplifier Repairs

Musical Fidelity A1

Musical Fidelity A1

They were designed by Tim de Paravicini and create a huge amount of heat even though they are only rated at 20 Watts per channel.

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The above pictures are from a Swedish Mk I with a 2 piece top heat-sink. It is in very good condition internally considering it reaches 50-60°C!

The Mk II (below) has perforated side plates. If I used one regularly then I would remove the side plates to provide ventilation through the internals of the amplifier when powered up. This one also had a one piece top\heat-sink. The switches needed cleaning and a capacitor needed replacing, thankfully Musical Fidelity decided to use 105°C caps in this and later versions so it hadn't dried them all out. An output transistor was faulty in one of the amps, they are 2N3055\2955 complementary pairs.

Musical Fidelity A1 Musical Fidelity A1 Musical Fidelity A1 Musical Fidelity A1 Musical Fidelity A1