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Quickest & most compact way to build a 1290/1073 mic pre.

Only need to solder 36 parts to motherboard PCB.

BAX83NV & BAX83AM modules fully built and tested.

BAX83AM trim pot preset for Neve LO1166 & JLM111DC

output transformer.

 

 

 JLM Micro1290 Kit

Reviews from some Web Forums on the JLM Micro 1290 Mic Pre kit & PCB

JLMMicro1290.PCB above is 4" (102mm) x 1.6" (43mm).

JLM BAX83NV & BAX83AM PCBs are both 1.6" (32.7mm) wide x 1" (25.4mm) high. Modules come fully assembled and tested. With the BAX83AM module trim pot preset for Neve LO1166 & JLM111DC output transformers.

If you can not open the PDF's below you will need Acrobat reader 7.0.

New Back panel layout below for New 1290 everything kit. See NEW overlay above for delays.

 

JLM111DC Output transformer

Can be used for Neve LO1166 or API 2503 type DIY projects. The transformer is DC gapped and has 3 identical 150ohm windings that are trifilar wound. So can use as 1:1:1 or 1:2 or 2:1 applications. It is physically the same size as the LO1166 except the the top terminal plate is narrower so it will fit on its side in 1 unit high racks which have a 38mm internal height. Each winding has its connections opposite each other and one side is marked Red+ and the other Yellow-. 

  • For 1:1 use any winding for primary and any other winding for secondary.
  • For 1:2 you could use winding 1 for primary and wire +2 to -3 and take  +3 & -2 as the secondary.

JLM GO Between & JLM DI kits can be used to give JLM MIcro1290 module extra mic pre features.