THE preamp
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1997 This preamp is realisation of many ideas that had been floating around, about the "best" way to do things. The aim was to exclude semiconductors, feedback and electrolytic capacitors, series switching connections and potentiometer wipers from the audio path and power supply. The result is a preamp with valve rectification (EZ80), shunt regulated HT supply (12BH4, 12AX7), anode follower input (ECC81), and SRPP type of output (ECC88, E88CC, ECC288). It also incorporates some unusual (or just odd) features because I wanted to see how they performed. The output stage gain is set by 5k1 resistor after the output decoupling caps (20uF). The input selection and volume control are both shunt. |
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The pre, user interface.Inspired industrial design, fully LVD compliant etc. No I didn't have any small children when I built this device! |