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A Spring Line Reverb Unit

From the 1972 a spring line reverbration unit using a spring reverb unit.
A fairly straightforward design using the following transistors: BC108 BC109 AC128 and AC127. All of which are still readily availiable.
The Spring Line Unit specified is obviously not availiable but alternatives can be obtained. Try the following site http://www.accutronicsreverb.com/ who manufacture the units. Their site also gives information and history on spring reverb.
The site has data for the units availiable and using the data from the article it is fairly straightforward to alter the design to suit.