Tube Amp Archive

YOU BETTER PLACE AN ORDER FOR A DUMBLE AMP INSTEAD POSTING ON FACEBOOK IN THE NAME OF MR. DUMBLE.

ALEX HOWARD DUMBLE- ROCK'N ROLL DOCTOR-LITTLE FEAT DUMBLE ON STAGE.... ENJOY THE WELLKNOWN SOUND http://www.youtube.com/watch?v=HMEkR3YRUnQ THANK YOU ALEX... THIS IS IT...

Try to replace the output transformer with a bigger one. Do not change values in the schematic .. increased core section will give you more lows... [/b]

Do you think that HAD covered with goop that part of the b oard accidentally? You can identify the source of the microfonic noise using the hammer test...take a drumstick as you hold a pencil in your hand and kick the preamp 's caps one by one until you find the source of noise... may be even the fi...

Sorry, but you made a mistake...i noticed it at the first sight... your coupling caps must be turned 180 degrees ,cos in this manner you have hum noise ... the marked side must be soldered to the plate...AM I RIGHT OR WRONG? [/b]

Hi there...Easter Rabbit wants to bring you the new Q&E new amp cradles, designed to help you work faster and easier, suitable for all chassis sizes from standard, to longer ones as steel string singer, or reverb and dumbelator equiped ones .Waiting for opinions..TURNING AMP CRADLE.also a new propos...

Hi everybody..i feel the need to install a simple footswich for simple volume boost on my Dumble .. Can any body give me some suggestions about the best stage that can host this function ?... I want to keep the classic 1979 schematic , that seems to me best sounding.. Will it be good if i'll tweak t...

REALLY MAY BE AN OLD MODDED FENDER AMP.. I WONDER HAD DID SUCH THINGS.IN THREE YEARS , ON THIS FORUM , I DID NOT FIND A VINTAGE TREMOLO DUMBLE.

LOL

thank you for resonating, ANDY , ... my design professor was trained in Columbus Ohio Design Institute.May be you can help me to get the patent for it..

HI EVERYONE, What about a new issue? THE INVENTOR'S PLANET.. Wouldn't it be nice to hear about new crazy things? HAD will be the first one who will post on it.. No doubt about your creativity.

hello again.. i most enjoy the pictures .. and schematics...even hand drawed sketches.. have fun.. some are placing the swich xlr on the front ..

Hi everyone.. please take a look at my schematic .. waiting for suggestions..

BEST SOLUTION IS TO HAVE READY WIRED SIMETRICAL 6.3 V AC SECONDARIES,MIDDLE GROUNDED , SEPARATE FOR PREAMP AND SEPARATE FOR 6L6 . OTHERWISE , TWO 100 OHM 1W RESISTORS FOR 12AX7 , AND TWO 150 OHM 5W FOR 6L6 END GROUNDED, AS USUAL , BUT THIS CLASSIC SOLUTION MEANS ENERGY WASTED , TRANSFORMED IN HEAT.F...