Aclam Dr Robert Pedal

THE MOST ACCURATE REPLICA OF THE ORIGINAL UL730 PREAMP

Dr Robert is a guitar overdrive pedal based on the Normal channel of our Vox® UL730 S/N: 3042. This amp in a box pedal was designed to be the closest replica of the amp’s soul and character. A meticulous process of tracing the original tag board circuits and measuring each component’s value has resulted in a sonic approach never reached before.

DR. ROBERT PEDAL MAIN FEATURES

Sometimes you can’t trust the internet or an old schematic! We’ve found major discrepancies between the published schematic and the real thing, such as component types and values, so we can assure you this is the closest you can get to the rarest Vox amp! Following the preamp, there’s a custom FET-based circuit emulating the saturation produced by the UL730 EL84’s tube power amp section. Additionally, the circuit works with the same voltages found on the original amp thanks to a charge pump circuit which takes the 9VDC from the battery or DC plug and converts it to 18VDC.