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Universal Audio 175A, variable mu compressor Schematic

Universal Audio 176, variable mu compressor Schematic

Universal Audio 177, variable mu compressor Schematic

Urei LA 2A Schematic

Urei LA 3A Schematic

Urei LA 4, this is the "black faced LA4, uses 846 op amps Schematic

Urei LA 4A, silver LA-4, uses all 4136 op amps Schematic

Urei 1176 original "blue stripe" page one, page two

Urei 1176 LN mod, hand drawn schematic of LN board Schematic

Urei 1176LN series D, "Black face", single ended class A output Schematic

Urei 1176LN series F, "Black face", push pull class AB output page one, page two, page three

Urei BL 40, Modulimiter page one, page two, page three,
whole schematic (pdf)
Complete Manual (pdf) 5MB, not available on JBL site
I just found the BL-40 manual on the JBL site, its buried in a directory and not linked, who knew. It is a more recent copy than what I have posted and includes newer and older schematics, mine is the original only. JBL site manual (pdf)

Urei 527 Equalizer Schematic

Urei 533 Equalizer Schematic

Urei 537 Equalizer Schematic

Urei 545 Parametric Equalizer Schematic

Universal Audio 1108 Mic Pre hand drawn schematic (pdf) Schematic

Universal Audio 1108 Mic Pre and notes from manual Schematic and notes (pdf)

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