Home made (DIY) Overdrive HRM Bluesmaster
From this CERIATONE layout
I bought this chassis from : http://cepedals.com/Dumble-Style-Chassis.html (very well made using 0.125'' thick aluminium, welded corners, black powder paint and nice silk screen job, highly recommend seller). Found this seller on the Amp Garage forum : http://ampgarage.com
This chassis is made with four octal sockets holes for a ''100 Watter amp'' but I'm building it with four 6V6 power tubes (or two 6L6 family tubes). I stripped my 5E3x2 amp ( http://jeangodbout.com/5E3x2/5e3x2.html ) to ''steal'' the transformers, choke, sockets, tubes, switchs etc... The tone stack of a Tweed Deluxe is very primitive with only two volumes and a single tone control so I wass looking a way to mod the circuit with more controls when I realise that I could swap the parts into this Dumble clone.
I made the circuit boards using regular printed circuit bords available to any electronic store, I remouved the brass coating in etchant acid, than I glued a layer of 0.020'' rosewood veener and regular 1/8'' D. eyelets press fit are use.
Power transformer is a 290DX Hammond 120 VAC 60 Hz. 325-0-325V @ 200ma, 50V bias tap, filament 6.3V @ 4A, rectifier filament 5V @ 3A, Hammond replacement for Fender Super Reverb, Fender Pro Reverb, Fender Bandmaster Reverb, Fender Tweed Bassman, 125P5D & 022798. Equivalent to the Weber W022798.
Output transformer is a Hammond 1750M, 4,200 C.T. secondary 2, 4, 8 Ohms, Push-Pull 50 Watts, Fender General Replacement 125A13A & 022871. Equivalent to the Weber W404248.
The choke come from an old Silver face Fender Bandmaster (1974) that I converted into a Vibroverb amp : http://www.jeangodbout.com/vibroverb/clone-1-en.html
Here a You Tube clip play by Gregor Hilden on a DUMBLE amp
Click this picture for more resolution
The two relays switchs work on 5VDC, so I used the 5VAC from power transformer (normally use to aliment the filaments of the tube rectifier) the 5VAC is rectified than it go into a voltage doubler (I have 12.75 VDC witch is use for the 12 Volts led light) than it go into a LM7805 Voltage regulator to aliment the relays and the foot switch at 4.98 VDC. I still had to connect the two relays when I took the picture, other than that, it is ready to fire-up :-)
Trim pots are 1 Watt rating, cost about $4 or $5.00 each from Mouser, but they are nice and strong.
The orange drop capacitors are the PS series rated at 600V.
Pine cabinet, finger joints + hard wood dowels
This is Stevie Ray VAUGHAN (Number two) Dumble
This Dumble belong to Gregor HILDEN
NEW : Trainwreck Express 4-4-0
NEW : Fender Princeton Reverb clone
OVERDRIVE HRM BLUESMASTER - DUMBLE clone amp
Tube condenser microphone
John LENNON Gibson Les Paul Junior Custom clone or style
Rosewood Telecaster clone (by far my favorite guitar)
Terry KILGORE tube scam with the complicity of George METROPOULOS (METRO AMP)
+ Marshall JTM45 clone
Jumping into modernity, Parker Fly Style guitar
Experimenting pickups winding
My Fender Vibroverb clone amp
Fender Tweed Deluxe (5E3) clone
TWIN Tweed Deluxe or 5E3x2
Fender Telecaster clone building page
Fender Stratocaster clone guitar
Here a funny Telecaster with a double personality
Oh yes ... I also build acoustic guitar, here my take on a Martin clone (000-42 Style)
Front 1 - Front 2 - Back - With Jacques MICHEL