EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Schematic
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Power supply Schematic
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Delay Schematic
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Foamboard prototype
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Foamboard prototype, more tubes and parts
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Stack of PCB's with lone 6SN7
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Top View of the PCB being Assembled
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Completed PCB, Top View
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Bottom of the PCB, completed
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Getting Ready to make the prototype on the Hammond chassis
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Hammond Chassis all drilled out
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Underside of the prototype
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Rear of the prototype about to be fired up
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Home Made HV Rectifiers for testing solid state
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Winding up the amplifier
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Square wave at 10kHz at 60 Watts
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Square wave at 1kHz at 60 Watts
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Unibit used a lot on this project
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Rotabroach and Holecutter kits used
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Layout of chassis drilling
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Beginning drilling the holes
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Close view of the Holecutters work
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Close view of the Hammond Chassis all drilled out.
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Marking back panel
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Front and Back panels getting primer
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Self Etching Primer on chassis
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Back Panel with Self Etching Primer
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Chassis Bottom Panel Un-Painted
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Transformer mounting on top of unfinished chassis
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Top Panel After Primer
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Top Panel After Primer, Close
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Painting the Chassis
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Top panel after paint
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Completed back panel
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Back side of panel
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Front Panel with lamp socket
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Front Panel inside view with lamp socket
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Chassis assembly
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Chassis assembly
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Chassis Corner Detail Prior To Assembly
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Chassis Corner Detail
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Mounting Edcor choke
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Back view of assembly
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Top panel mounted with completed pcb, Back side
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Ugly finish on transformers
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Transformer Bells getting a nicer finish
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Heyboer transformer apart for paint
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Heyboer transformer getting newly painted bells
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Large Rubber Feet for the Heavy Amp
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Test fitting the bottom panel
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Chassis Bottom Panel
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Fitted Chassis
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Top panel mounted with completed pcb
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Assembled Chassis, needs tubes
EZ-125 Quad KT-88 : Bench Testing in Hammond Chassis EZ-125 Quad KT-88 : Assembled Chassis, top side of chassis

EZ125 Amplifier Project Gallery

This is the gallery of the EZ125 Quad KT88 amplifier. The target amplifier was for 125 watts and designed to be easily built in the spirit of the ‘EZ’ amplifiers that I have put together. The amp features timed soft start, tube or solid state rectification, regulated bias supply, and use of 6SN7’s as preamp, inverter, driver and the cathode follower. It can drive a quad of most anything from 6550’s, KT88’s or KT120’s if you have the correct power supply.

EZ260 Tube Amplifiers and Tube Projects