DIY-Central.com - Go Create something! - PCB Design, Electronics - Sony Preamp

Sony MXP-3036 Preamp + EQ

DIY-Central.com Administrator — Sun, 11 Feb 2007 00:46:24 GMT

It's done... some pictures. Using my custom PCB for the power supply, and an MCI output transformer on the outputs to convert it to balanced outs.

It works... sounds nice and clean! The EQ lets you sculpt the sound nicely. No hum, no noise. It's great!

DIY: Racking Sony MXP Preamps and EQ modules - Part 2

DIY-Central.com Administrator — Fri, 26 Jan 2007 03:14:48 GMT

This is a continuation of my Sony Racking Job. Click here for previous article.
http://diy-central.com/DIYRackingSonyMXPPreampsAndEQModules.aspx

Things are progressing nicely. Some photos.

Finally cut the hole for the EQ section... took about 2+ hours... it's a pain doing this. And I have to be careful not to make the square holes too big because the tolerances are very tight.

Some closeup photos of the Preamp and EQ module.

DIY: PSU PCB

DIY-Central.com Administrator — Fri, 26 Jan 2007 02:48:53 GMT

This is a continuation from this article.
http://www.diy-central.com/DIYSplitPowerSupplyWith48VPhantomPower.aspx

Well, I received the PCBs today but it seems there was a manufacturing error. Everything is flipped/mirrored... Here's how the top layer looks like... the bottom layer is also flipped/mirrored.

BUMMER!

I sent this picture to the manufacturer along with what the Eagle board is supposed to look like. I emailed them... and within a couple of hours, I got a call from them on the phone apologizing for the mistake and they found out where in their process they had the mistake... they're going to remanufacture my boards and resend them to me at no charge! Talk about great service! The quality of the boards and it's workmanship do look very nice too, and their prices are great.

This is my first order from them, and even if they did screwed this up, I think I'll use them in the future. I like how they handled the problem very well and took steps to correct it.

I'll keep you guys updated about the progress.

DIY: Racking Sony MXP Preamps and EQ modules

DIY-Central.com Administrator — Sat, 20 Jan 2007 22:31:43 GMT

I decided to rack the few remaining Sony MXP preamp and EQ modules I have. This particular mic pre module is using a discrete opamp enclosed in some green colored epoxy or something.

I've already racked a previous Sony mic pre and EQ, so I want this 2nd unit to match the layout of the first one I did. The only difference is this particular project, the mic pre does not have the Jensen transformers, and instead is using some discrete opamp, and will be in a black 1u case.

Here are some preliminary pictures.

The Mic Pre and EQ module I'll be racking.

Preparing the 1u front panel for drilling holes.

Having a drill press makes the job so much easier than using a hand drill. Safety first... don't forget to use goggles. Freak accidents happen, like a drill bit breaking and flying into your eye! (good thing I had the goggles!) So no matter show "quick" a job it is, don't forget your safety glasses or goggles.