Vladimir Slajch built my portable positive organ at his workshop in Borovany near Ceske Budejovice in 2008.

The instrument has the following specifications:

Copula major 8′
Copula minor 4′
Principal 2′
Mixture II

range C–f′′′
tuning a′ = 440 Hz, Valotti temperament

The positive organ is assembled from two parts, so it is portable. It also has a transposition mechanism, permitting the use of both copulas with the tuning a′ = 415 Hz. This makes it the ideal instrument for performing solo works, concertos and chamber music.