The "Arpeggione" Triode Amplifier Based on the Walton Audio 300B MK1.5 SET amplifier. At the moment I use Osram L63, RCA 6J5GT, Svetlana 300B and Mullard GZ37 tubes.
		Amplifier schematic PSU Schematic My father at work.. Trying the IEC socket Cabinet contruction: Front View - Nude wood 3/4 View Volume knob case close-up IEC socket side Rear View - Nude wood Rear View: AN binding posts & IEC socket with mains switch Audio Note binding posts Front View with neon lamp & volume pot Close-up of the first PSU cap & IEC socket 3/4 Front View - Volume pot Volume wooden knob Volume wooden knob Ko-On Volume pot Audio Note silver plated sockets With 3mm aluminium top plate Aluminium under the film Trying the layout.. I made a paper template to center the holes T-nuts in the base for applying the spikes Drilling the tube socket holes... The step-drill in action, with some oil to avoid excessive heating Finishing the tube socket holes.. 51 and 64 mm Drill bits for the PSU capacitors All holes done! First polishing with Emery paper. We used 100, 220, 550, 800 & 1200 types Claeaning the plate with a spray de-greaser Washing accurately the aluminium.. The cabinet ready after the polishing The ASC 50uF bias cap for the 6J5 driver is placed inside the cabinet Applying rubber grommets for TXs mechanical insulation.. All grommets in place Screws with the grommets. All the screws used are non-magnetic inox ones Screws using grommets have to be blocked with some Loctite glue I use two little grommets for insulate the UX4 socket for the 300B The two half grommets are glued to avoid that the screw touch the socket Here you can see the socket screwed to the top plate Oil-Filled ASC PSU capacitor in place Sockets, bias res and cap in place It begins to look like an amplifier!!! Wooden sides screwed to the top plate AC wiring from the PTX Heaters wiring Heaters wiring Heaters wiring Silver ground buss in place 5% carbon resisitors have been selected and matched in pairs Each tag has been cleaned before the soldering Input & driver sections completed from the front Input & driver sections completed from the rear PSU section completed COMPLETED!! Rear view.. Front view.. Inside Left channel and Right channel I changed the humpot to a Clarostat because the Vishay was noisy The two channels just completed! Now they are perfectly silent And this is my little labo where I built them: 1,4 X 1,8 meters! The final result! A GREAT sound! Front view of the tubes In order: L63, 6J5GT, 300B, 5Z4C Some like it hot...