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SC-1mk2 and SC-1mk500 Mic Preamp Kits

SC-1mk2 Preamp Kit	SC-1mk500 Lunchbox Preamp Kit

Monday, December 28, 2009

TS-2 Rev.B Preamp Redesign

Monday, December 28, 2009 11:04:46 PM (Central Standard Time, UTC-06:00) ( DC-DC Converter | DIY | PCB | TS-2 Preamp )

A flash of inspiration... I found a smaller footprint output transformer I can use... so I created an Eagle part library for that. (Tip: use a digital caliper when creating part libraries)

After some creative rearranging of parts, and I made this.

This is just the motherboard. Measuring about 6" x 6".

Ch-check it out!

2 Input Transformers - NEW FEATURE
2 Output Transformers - NEW FEATURE
Gain and Trim knob for each channel
2 VU Meters
4 Full size XLRs
Relay Controlled switching - NEW FEATURE
Bigger DC Converters - NEW FEATURE
... and better PCB layout by re-arranging parts.

Also, reduced the number of molex connectors from the original (7) to a single 10-pin Molex! That will be a big time-saver.... plus the use of PCB mounted XLR Neutrik Jacks.

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