Tube Amp Archive

Sorry I forgot to mention about the SS rectifier :roll: It’s planned in my build . As I will not use the channel 1 and to avoid butchering the faceplate all the pot from channel 1 will be replaced by the master / mid / maybe a presence as per Rob Rob mod and the bright switch could be a « glass «  s...

Hi , Thank you for your reply :wink: ! Currently the amp is a dead stock 69 bandmaster with his paktron components and white Mallory (although not sure the Mallory are stock). The amp sounds clean and « modern » not my taste , I miss that blackface sound. My goal is to convert it in a Vibroverb clon...

Hi guys, I want to increase the glassy tone of my amp. How could I tweak an AB763 circuit to implement a pot or switch to increase the "glass" tone of a Fender (actually a Vibroverb clone based on a 69 bandmaster). Which components are involved in the tone stack for that mod ? Any suggestion ? Thank...

Thank you Martin, much appreciated !

Hi guys, Can you advice which model (except SSS) of Dumble amp or Dumble modifications could improve an AB763 Fender Vibroverb to still keep that clean Fender scooped tone with add of that "magic" improved Dumble articulate definition ? I have an Altec lansing 15" speaker. On clean and crunch only ,...

Thank you very much Stratomaster ! Well appreciated
Will have a try inspired by your advices

Hello , Thank you for the interesting link , I agree totally and understand what you mean. Of course Stevie ‘s hands were the major Parts of tone but tech side we can approach his sound with well prepped amp and having fun. It’s just an interesting quest and passion to try improving an amp to a pers...

Hi , Thank you very much both for your replies, I used to modify my Vibroverb as per the tone quest article back then but not all the mods . However I used a master volume to achieve a cranked tone at low volume. Sounded great but nasal and muddy at high volume. I agree with stratomaster, the way St...

Hello everybody, I project to build a Vibroclone which includes major mods to achieve kind of Vibroverb tone on steroids I plan to use a silverface bandmaster and convert it , using chassis and also the wood from his large cabinet to build an accurate Vibro cabinet period correct. Here is the heart ...

Hello , Thank you for the kind reply , Apologize if I posted in the wrong section, I understood it early after but didn’t know how to do to move it in another section. About components I was not lazzy :wink: just I have not yet studied all the post . Anyway thank you ! And if someone got any news fr...

Hello everybody, I am new in this forum , longtime player and short time builder :? Fascinated by Dumble amp for decades although never build one because lack of knowledges . So with time I learn from you step by step. A long path full of humility and still a long way to go. I decided to try a build...