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Home Brew EPI Valve Jr. Clone 12AX7 + EL84 - $200 (Stonehenge, Raleigh NC)
Farnborough near Howard
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This is a 2013 build that has been used in a studio, along with other vintage equipment, and now up for sale. Utilizing a 12AX7 preamp with an EL84 (6BQ5) output tube, its output is around 5-watts using an Epiphone Valve Jr as the base circuit with a few “tweaks”.
Single input jack with a volume control and 4/8/16 ohm impedance outputs. All P2P (Point to Point) wiring using a tag-board and tag strips. My goal was building a much smaller version of EVJ that you could hold in your hand or display on a shelf.
DIMENSIONS:
• LENGTH: 9.0”
• HEIGHT: 4.75”
• DEPTH: 5.0”
The primary EPI-VJR modification is adding a “Conjunctive Filter” circuit as used by Mike Zaite (AKA Dr. Z who founded Dr. Z Amplification) on his Carmen Ghia model. From the interview below: “…allows frequencies to be very flat, or balanced. From say, 100Hz to 3K, the amplitude is the same. So from the high E to low E strings if your pick attack is the same, you'll get the same volume from the notes…”
DR. Z Interview Regarding Corrective/Conjunctive Filters:
https://www.tdpri.com/threads/the-secret-of-dr-zs-amp-mojo-rca-conjunctive-filtering-design-guide.310494/
LOCATION-RALEIGH-STONEHENGE Demo/pickup from our open garage or driveway in the Stonehenge subdivision of Raleigh about 3 miles north of Crabtree Valley Mall off of Creedmoor Road.
Thanks for looking!