positive grid bias professional v1.1.0.3.7.4

#Positive grid bias professional v1.1.0.3.7.4 mods

With the Treble and Bass tone controls set to minimum the tone curve is (Treble, Mid, Bass) tone stack sets this mid frequency scoop. The AB763 blackface tone is known for its 'mid scoop.' You can firm up the Deluxe Reverb with a larger firstįilter capacitor or even an upgraded power transformer but you will lose some of Have higher output power supplies that do not suffer from the Deluxe Reverb's The other AB763 amps like the Twin Reverb The AB763'sĬlean, clear tone comes from the use of lots of negative feedback.ĭeluxe Reverb is known for its under rated power supply which gives the ampĪ lot of feel and touch response but leads to a loose low end and even 'farting This trait also makes the AB763 circuit very pedalįriendly-it can play loud and clean to let the pedals do their thing. Ubiquitous voice are its mid scoop tone and loud and clear, but not too sterile character, especially when compared

Some of the elements that give the AB763 Deluxe Reverb such a Output Transformer are attached to the bottom of the chassis. The AB763 Deluxe Reverb ChassisĬontrols in front, Circuit Board inside, tubes on bottom and out of view. Page dedicated to the magical 5F6-A tweed BassmanĪmp and the ever popular 5E3 Deluxe. Tube theory and other introductory material here so check it out if you have Tubes work in the very simple Fender 5F1 Champ. I recommend you take a look at my How Tube Amps Work and How Vacuum Tubes Work webpages for a detailed The 'blackface' nickname comes from the control panel Of how the amp circuit works, what each component does, and how changing those I will try my best to give a not-too-technical explanation Vibroverb, Tremolux and no-reverb Deluxe. The '763' in the model name comes from the circuit change dateĭeluxe Reverb, Twin Reverb, Super Reverb, Bandmaster, Showman, Pro, Vibrolux, 'AB763' was Fender's internal model designation for the 1963Ĭircuit. Have comments or corrections? Email rob at: robinette at

#Positive grid bias professional v1.1.0.3.7.4 mods

DRRI & 68 CDR Mods ] ] How the Fender AB763 Blackface Deluxe Reverb Amp Works The non-electronic tech's guide to understanding the classic AB763