Stereomaster Adapter circa 1957-1960
The 135 was a completely passive device, that provided central control of two mono amplifiers.Controls included: AC power switching, Master Volume, Loudness compensation, stereo/mono function selector. Introduced the very narrow "H" case/chassis, later used on the 335 MPX Adaptor.The 135 was an innovative and inexpensive "stop-gap" solution that introduced the then-new (1957) concept of two-channel LP
stereo phono sources.It permitted Scott's installed base of monophonic users to protect their investment, while Scott engineers worked on integrated
Stereomaster designs like the 130 and 299.