Is it ok if I use unshielded hook up wire for audio connections such as transformer to XLR, transformer to PCB etc? Having the 10468 (VTB9045) too close to LO1166 (VTB9049)Īlso check the resistor values around the gain switch. Running mic input wires too close to line output wires (especially unshielded) ☺Īt higher gain settings, all I get is a very high pitched noise, or screeching, audio drop out?Īh, the sound of oscillation. How much does it cost to build one channel, complete with case and power supply?Ĭount on about $200-$300 per channel, not exactly free, but a good deal nonetheless. Other than that it is a great substitute: ĭon’t use the L’s. One important detail about using MPSA18 in place of BC184C is that MPSA18 will need to be mounted backwards (rotated 180 degrees on its vertical axis) on the PCB. You should be able to find them on eBay if you’re really wanting to use BC184. Other than that it’s Carnhill or bust in my humble opinion.īC184C is now obsolete. Ives or Marinair 10468 and LO1166 would be a good start. Drill those with a 1/8″ drill.Ĭan I use some other transformers besides the Carnhills?

Then put the connector in the hole (use a carpenter’s square to align the connectors straight on the case) and mark the small 4-40 flat screw holes. I laid it out with a ruler and center punch, pre-drilled with 3/8″ drill and then punched with a 15/16″ Greenlee punch. Some helpful tips from designer Martin Adriaanse:

Checkout the GroupDIY thread detailing this build.The 1290 number originates from Neve’s very own 1290 preamp which was essentially a 1073 sans EQ” – Martin Adriaanse, designer.Īnalog Classics does not provide build support on this project. “The EZ1290 is a carefully designed replica of the classic Neve 1073 preamp without EQ and Line-‐Input. Please refer to the documentation tab for the BOM and other build docs. This build is very well documented and sounds amazing. This DIY EZ1290 PCB is the same circuit found in the Neve 1290 preamp which is popular because it serves as the preamp for the famed Neve 1073 module.

Neve 1073 preamp pcb