Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: p2pAmps on April 03, 2020, 05:35:37 pm
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Hello team,
This is a project I'm just starting to play with. An AB763 / One Channel / no-tremolo. A few things you will see is the 1M resistor missing in the reverb circuit. I will be adding a dwell control in place of that thus the extra set of brown and yellow twisted wire. The 51K resistor you see is a tremolo load resistor.
So... I am all ears for you experts that see my short comings. Please come fourth and tell me what I may have missed or just plain messed up.
Cheers and stay safe
Mike
(https://images.squarespace-cdn.com/content/v1/56fbe87462cd94ff6ec9d02c/1585953093338-RJ9UPA680FL0IHOANFN5/ke17ZwdGBToddI8pDm48kI92NeKnLg7XBAc64xNsWpR7gQa3H78H3Y0txjaiv_0fDoOvxcdMmMKkDsyUqMSsMWxHk725yiiHCCLfrh8O1z5QHyNOqBUUEtDDsRWrJLTmLLxGPZs9cXJqW7PQ94qJw5O9wQm9af9u3DSkF--A8RYMyAtpGhc92cTkcSDMVHln/IMG_9816.JPG?format=2500w)
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Clean and neat as always. Schematic tells all.
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Hello team,
This is a project I'm just starting to play with. An AB763 / One Channel / no-tremolo. A few things you will see is the 1M resistor missing in the reverb circuit. I will be adding a dwell control in place of that thus the extra set of brown and yellow twisted wire. The 51K resistor you see is a tremolo load resistor.
So... I am all ears for you experts that see my short comings. Please come fourth and tell me what I may have missed or just plain messed up.
Cheers and stay safe
Mike
Mike,
What chassis are you going to use? Are you using a Cap Board and where will you mount it?
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I did a 1-channel AB763 circuit sans verb and trem, and instead of pre-amp attenuation I changed the TS to a James TS, which is set up in such a way to give flat response with pot rotation at 50% and wide range or adjustment for treble and bass. Also has a 'raw' (TS lift) switch for really basic extra grunt.