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 NEW    Bruce Heran outlines the details and construction of his simple DIY 6DJ8 (ECC88) Tube Hi-Fi Headphone Amplifier Project.

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S5-K16LS-Tube-Amp-Kit-Mahogany.jpg
S5-K16LS-Tube-Amp-Kit-Mahogany.jpgK-16LS Tube Amp Kit (16W)4010 viewsThe S-5 Electronics K-16LS tube amplifier kit built into a Mahogany case. The tube amp kit was built with all the mods outlined in the forums here at diyAudioProjects.com. The circuit board was built with components (except the tube sockets) on the bottom side so just the tubes would be exposed. The front driver tubes is lit red with LEDs.

Charlie Mooradian
USA
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DIY-6s45p-300B-GU-48-Tube-Amplifier.jpgDIY 6s45p / 300B / GU-48 Tube Amplifier - 125 Watts3989 viewsMy 125W tube amplifier. The input tube is 6s45p which drives a 300B and is followed by a GU-48 (replacement for the 833 tube). The 6s45p input tube is DC coupled to a 300B. There are no resistors or capacitors in the signal path. The 300B is coupled to a GU-48 tube through a step-down interstage transformer. Driver and output tubes are fixed biased for more natural and dynamic result. Output tube is working at 1000V-250mA. Amplifier gives me 125W single ended sound in class A2 mode. It has very powerful deep bass, mids are very loud and lovely. Highs are very clear. I am feeling like in concert hall. The case is made from 20mm thick African Wenge wood. Chassis is 2 mm thick electrostatic painted steel. The total weight is 50 kg.
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12AU7-IRF510-LM317-Headphone-Amp.jpg12AU7 Tube / IRF510 MOSFET Headphone Amp3962 viewsSimple headphone amplifier with a 12AU7 (ECC82) tube voltage gain stage and a IRF510 MOSFET follower stage. A 12V SLA battery is used for the power supply. A LM317 regulator is used as a CCS to bias the MOSFET into class-A operation.

See the project page: 12AU7 (ECC82) Tube / IRF510 MOSFET Headphone Amplifier
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00003.jpgCustom PCB3946 viewsI know... its not a printed circuit board... because its not printed... but i made it with love.
You can see the rear of the LM3886 and the power cables.
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00094.jpgRectifier capacitors3937 viewsWired with the resistors, smaller caps and a cooper cable extension to make easier the soldering and assembly.
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Point_to_Point_Bride_of_Zen_Preamplifier.jpgBoZoaC - Bride of Zen on a Cap3926 viewsAfter building a number of Bride of Zen (BoZ) preamplifiers I realised the whole circuit could be built on larger parts of itself. Here the whole BoZ circuit is constructed on the large output capacitors. The output caps are 10uF 100V polypropylene types. These were taped together along with two 1000uF of low ESR storage caps. Parts have been reduced to minimum size to keep signal path short and super glued to the rest on the cct. Silver solder and wirewrap wire is used throughout construction. There are two switchable inputs and the preamp can be powered by internal batteries (3 X 9V lithium) or an external supply. A bitumen and Al lined, non-magnetic low resonance ABS plastic case was used. Mongrel Dog Audio
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6C33C-6S33S-Single-Ended-Tube-Amplifier.jpg6C33C (6S33S) Single-Ended Tube Amplifier3912 viewsMy new project, a 6C33C (6S33S) Single-Ended Tube Amplifier with 6E5P driver tubes. The power supply is contained in an external enclosure. Additional details are available in the 6C33C Tube Amplifier thread.
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DIY-Vacuum-Tube-Prototype-Bread-Board.jpgDIY Vacuum Tube (Valve) Prototyping Bread Board3881 viewsA simple DIY Vacuum Tube (Valve) Prototyping Test Board used to test single stage tube circuits.

See the DIY Vacuum Tube Prototyping Board post for additional details.
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50EH5-DIY-Tube-Amp-Rear.jpgDIY 50EH5 SE Tube Amp - Rear View3880 viewsThis tube amp is based on Giovanni's DIY 50EH5 SE Tube Amplifier. The enclosure is a black painted metal cookie tin.
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0006sa0w.jpegOTL 6082 amplifier3867 viewsThis is my latest (work in progress) amplifier. It is a transformerless design using 6082's in the output stage. 6082's are 26.5 volt 6AS7GA's which were originally designed for series pass regulator service. More information can be found at the bottom this webpage.
http://userpages.bright.net/~geary/misc/radiohandbook.html

Steve Geary (z-strat)
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00095.jpgMaking the chassis, rear view3866 viewsPutting together the plastic and the metal, rear view.
STA1-12AU7-ECC82-DIY-Tube-Preamp-Kit.jpg
STA1-12AU7-ECC82-DIY-Tube-Preamp-Kit.jpgSTA1 DIY Tube Preamp Kit (12AU7/ECC82) - inside3775 viewsInside view of a STA1 tube preamp kit from Lighthouse Electric. This a three stage design using 12AU7 tubes.
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DIY-KT88-Single-Ended-Tube-Amp~2.jpgDIY KT88 Single Ended Tube Amplifier3766 viewsSingle Ended Tube Amplifier after Mikael Abdellah's Single Ended (SE) KT88 Tube Amplifier Schematic.
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IMAGE_145.jpgOne valve (tube) 60W guitar amplifier3746 viewsThis guitar amp comprises of one $1000 radio transmitter valve which runs on 700Volts. The driver cct. is on the left and is a multi-stage transistor unit. The OPT on the right was wound by the owner using a primary/secondary interlace config. and then vacuum impregnated. A fan is required at the base of the valve to stop the ceramic socket over-heating. Very loud!
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TSpecial.JPG6T9 4.7W DIY Tube Amplifier in a Baking Pan3744 viewsA Tube amp kit based on Spare Time Gizmo's printed circuit boards which are plated through, solder masked and screen printed. I sourced common components from the local electronics shop but used a pair of NOS GEC 6T9, Alps potentiometer, solid brass knob and a Hammond power transformer. The chassis is a Teflon coated backing pan ($7). The OPTs are custom wound toroidals. The amp is a little bass shy. Doubling the 100uF power caps helped increase bass. See the 6T9 Tube Amplifier Project for more details.
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CSS-FR125SR-Fullrange-Speaker-Drivers.jpgCSS FR125SR Fullrange Speaker Drivers3735 viewsA pair of CSS FR125SR drivers by Creative Sound Solutions. These are nice looking drivers that unfortunately have a few problems. See the CSS FR125SR fullrange driver page for more information and Thiele / Small parameter measurements.
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DSCF0794-C.JPGDIY-GENE Mark Levinson Clone 60Watt Class A Amplifier3734 viewsFor those that are less willing to create their own cases. Here is a completed DIY-GENE Mark Levinson Clone 60Watt / Ch Dual Mono Amplifier. It is hernia inducing weighing in at nearly 50Kg. The kit comes with most of the amplifier electronics built and tested and with all the casing components. All you need to do is to build the PSUs and put it all together. This example has 2 x 65-0-65V at 10A each. It runs very HOT as you would expect a high output Class A amplifier to run. Great care must be taken to mount the 12 x Output Transistors correctly, a small mistake cost me over £60.00 in burnt components. Note the Capacitor connections and the extremely BEEFY PSU.

Built by Andy Freestone
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00119.jpgFinished, inside view3730 viewsEI transformer, rectifier, star ground (just above the left cap of the rectifier), LM3886...
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IMG_3492.jpgTesting of active crossover3726 viewsThe active crossover is using Rod Elliot's P09 design and is 24db/octave Linkwitz-Riley crossed at 3500Hz. Op amps are cheap TL072 and the sound is still great. Transients are not lost whatsoever.
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DSCF0795-C.JPGDIY-GENE Mark Levinson Clone 60Watt Class A Amplifier3726 viewsFor those that are less willing to create their own cases. Here is a completed DIY-GENE Mark Levinson Clone 60Watt / Ch Dual Mono Amplifier. It is hernia inducing weighing in at nearly 50Kg. The kit comes with most of the amplifier electronics built and tested and with all the casing components. All you need to do is to build the PSUs and put it all together. This example has 2 x 65-0-65V at 10A each. It runs very HOT as you would expect a high output Class A amplifier to run. Great care must be taken to mount the 12 x Output Transistors correctly, a small mistake cost me over £60.00 in burnt components. Note the Capacitor connections and the extremely BEEFY PSU.

Built by Andy Freestone
614 files on 31 page(s) 17


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