Archive for transformer

Universal Audio 1108 & 508

Posted in Racked Modules, Restored with tags , , , , , , , , , , , , , on October 7, 2012 by AnalogAudioRepair

This is a set of vintage Universal Audio (UA / Urei) 1108 discrete transistor microphone preamplifiers with matching 508 passive equalizers.  The preamps are transformer in and out and sound amazing.  The EQs use passive capacitors and inductors for simple but smooth EQ.  Restored and racked with phantom power and gain pots.

Yamaha PM1000

Posted in Modded, Racked Modules with tags , , , , , , , , , , , on September 19, 2012 by AnalogAudioRepair

Yamaha PM1000 discrete transistor console strips cut down, recapped, modded, and racked as mic pres with EQ.

GE 4BA1 Preamp

Posted in Restored with tags , , , , , , , on August 5, 2012 by AnalogAudioRepair

Vintage GE 4BA1 vacuum tube mic preamp.  Recapped (electrolytics inside the old can), re-tubed, and wired up with a restored GenRad regulated power supply.

Trident FlexiMix Board

Posted in Restored with tags , , , , , , , , , , , , on August 5, 2012 by AnalogAudioRepair

Trident FlexiMix console 10x2x2.  Restored and sold.  Note the three types of EQ modules.

RCA BA-31 Preamps

Posted in Racked Modules with tags , , , , , , on August 5, 2012 by AnalogAudioRepair

A pair of vintage RCA BA-31 discrete transistor microphone preamps with Daven output attenuators.