Chris van Lint

A couple of months ago I picked up a 7A22 differential amplifier at a fleemarket. I have only just now had time to have a play with it and It seems to work well and appears like an ordinary horizontal amplifier. Can anybody tell me what marvellous things I can do with this device that I cannot do with other 7A types. Is this in fact the type of plug-in to use instead of a floating earth, that has been subject to so much discussion?


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