Electro Research Corp. Model A 75 Iverson power amplifier.

as_audio

Member
2008-05-13 6:18 pm
Last week in my workshop : the "legendary" Iverson Power Amplifier.

Pictures of front and backside. The original time counter has been replaced
by one made in Germany and has already counted more than 8000 hours.

Speaker posts and RCA sockets are not original.
 

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Last edited:

as_audio

Member
2008-05-13 6:18 pm
More pictures

Top and bottom cover can be removed for full access to the self supporting chassis.

The main caps are not original. Somebody added a supply and regulator for the fan.

Mains transformer has a primitive EI core. Driver board in front is separated from the
current amps on the heatsinks. The big caps seem to be assigned l and r, but share
the same rectifier.
 

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