This package includes three boards: one board for gain stages 1 & 2 (BA189), the second board for the output amp (BA283AM) and the third board for the entire 1073 EQ/filter section, including make-up gain. Add small parts to the boards, transistors, inductors, wire up your input and output transformers, a gainswitch and a few connectors: voilà! Build it yourself and save a bunch. The configuration is based on the BA189+BA283AM -- instead of the BA284+BA283AV, as found in the original 1073.
I found that this 3-board topology (borrowed from the 1290) worked best. All stages are functionally equivalent. For example, the second half of the BA284 i. The make-up gain is included on the filter board.The circuit is otherwise 100% faithful to the original Neve circuits. The top layer is for chassis ground; the bottom layer is for signal and audio ground. All discrete paths, approaching star-ground for the grounding scheme. Isolation is of the utmost importance and all wiring points have shield connections. The traces are thick and curved -- no sharp bends or abrupt intersections.
The measurements are a follows. BA283AM -- 78mm x 88mm. BA189 -- 61mm x 82mm.2-74 Filter Board -- 100mm x 140mm. Schematics and a Bill of Materials will be provided.
The item "DIY Neve 1073 PCB Set - preamp with EQ - BA189 BA283 1290 LO1166 80dB gain" is in sale since Tuesday, January 9, 2018. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Preamps & Channel Strips". The seller is "yudlidl" and is located in Mountshannon, Co. This item can be shipped worldwide.