via Swissdoc where you'll find additional details including some samples, the user manual, service manual & schematics."The Swissecho 2000 is a true stereo spring reverb with a bucket brigade delay (BBD) section to simulate the pre-delay and kind of early reflections missing in normal spring reverb systems. The BBD used is a TDA1022, actually 24 of them. They provide a delay time of 300 ms and by using a clock rate of 20.480 kHz a frequency response of about up to 10 kHz.
The unit was sold with 12 TDA1022 as normal configuration, by adding some additional boards it could be extended.The reverb tank uses 2 springs folded in a double Z configuration. The case is shielded by an anti-magnetic layer, most likely mu-metal. The tank as such looks pretty much like the tank used in the AKG BX15 reverb. I don't know if Uniton or AKG designed the tank, or who built them."
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