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hand-built and signed by Analog Mike himself (dated 3/23).This is the classic germanium treble booster based on the Dallas Rangemaster circuit — perfect for pushing a tube amp into that legendary Clapton/May territory.Features the 3-way toggle for Low / Mid / High frequency boost and the original gray hammer finish enclosure. No mods or repairs. Works perfectly, sounds incredible, and comes with the signed interior plate and original wiring intact.Includes: Original signed enclosure, fresh 9V battery.

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