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LM3875-Gainclone-Breadboard.jpgLM3875 Gainclone on Breadboard6429 viewsLM3875 Gainclone. The circuit is the same as Mark's LM3875 Gainclone. Most of the parts are from Dick Smith which can also be found at Radio Shack.
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DIY-6AS7-Tube-Headphone-Amplifier.jpgDIY 6AS7 Tube Headphone Amplifier6423 viewsMy name is Laurie. I have been building and DIYing for 45 years now and happily will never stop. This tube headphone amp is from a thread in the Form.
The power connecting cable comes from a European Travel Iron I bought for $1.00 at junk shop. (220v/6A) They will be shortened when I find a perch for the amp and me. The sound is better than my ears have ever heard so I will be keeping this one for my retirement entertainment should such a time ever come. Wink It has worked from day one and continues to please me every time it is turned on. The tubes are JJ ECC88 / 6AS7 with a 5V4 rectifier tube. To spite it's small size the parts are quite easily accessed. I over built most components so it will outlast me I fear. The only change I anticipate may be the 6AS7 to a bottle neck glass to match the rectifier tube. I do have and use a 6080 tube, but i can tell no difference in sound. It will take more then a few hours of listening to get my ears better tuned.
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DIY-HiVi-Swans-M1-Speakers.jpgDIY Swans M1 Speakers - HiVi Research6419 viewsDIY build of the Swans M1 Speakers from HiVi Research.
See DIY HiVi Research Swans M1 Speakers
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NCDIYMeet042010a.jpgNorthern California DIY Audio meet Roseville, CA 04/24/20106406 viewsNice meeting with Sigfried Linkwitz guest speaker
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Diaphony7.jpg"Diaphony's" An open baffle design6386 viewsConstruction
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AMPTILT.jpgS5 Electronics K-12M Tube Amp Kit - Side View6367 viewsSide view of the K-12M Tube Amp Kit showing the circuit board underneath and transformers and tubes above.
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DSCF0800-C.JPGDIY-GENE Mark Levinson Clone 60Watt Class A Amplifier6336 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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DSCF0797-C.JPGDIY-GENE Mark Levinson Clone 60Watt Class A Amplifier6326 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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Pass_Aleph_4_DIY_Amp_Project.jpgVariant of the Aleph 4, a true 100W Class-A amplifier6317 viewsBuilt on a budget of less than £200 (mostly E-Bay). It generates some 400W of heat so the heatsinking is massive as are the power supplies. It uses 24 x IRFP244 MOS-FETs which are closely matched into groups of 6. This is the most exhaustive part of the build. Other than that the design is incredibly simple. PCBs are available from www.kk-pcb.com, although my article at diyAudio.com details the process and patterns that I used for my own build.
In the guise that you see in the photo, this amplifier runs at an internal temperature of 45 degrees C on a warm British Summer day, which is well below the 70-80 degrees that Nelson himself allows for his commercial products. The sound quality is simply STUNNING. I’m running an Arcam CD36 / Pumpkin-Shuntky Pre-amp / Passive Attenuator / B&W DM633 with Chord Chorus Silver Interconnects. The bass slam is accurate and endless, the sound stage perfect and the midrange just sweet as a nut. This replaced my A700, itself a clone of a Mark Levinson design, and absolutely knocks the ML into the ground.
The full project build can be seen at http://www.diyaudio.com/forums/pass-labs/172276-aleph-4-strickly-diy-project-build.html
Andy Freestone
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2-channel-Hi-Fi-Setup.jpgGio's Two Channel Hi-Fi Setup6310 viewsThis is my current 2-channel setup. NAD C521 CD player, NAD C162 preamp, DIY 50EH5 Tube Amp which drives Radio Shack 40-1310 Super Tweeters) and LM3886 Chip Amplifier (Gainclone) which drives a pair of BD-Pipes with Radio Shack 40-1197 drivers. The small box on the bottom right is a Slim Devices Squeezebox.
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Stereo_and_Seas_FA22RCZ_in_Open_Speaker_Enclosure.jpgSeas FA22RCZ Fullrange Speakers6309 viewsShown in the photo is my hi-fi stereo setup with and new pair of open cabinet speaker which I built. The diy speakers use a single Seas FA22RCZ driver per cabinet. The Seas FA22RCZ is a 200 mm (8") diameter fullrange driver with a sensitivity of about 94dB. The cabinet has an open bottom, see the Seas FA22RCZ Fullrange in Open Speaker Cabinet photo for more details.
The sound is very clean, open and free of compression artifacts, similar to open baffle speakers. Nevertheless, it has a satisfying bass depth.
See my blog for more information. It is written in German but you can use the Google translate tool on the right side of the page to translate.
Kind regards,
Carsten Bussler from Germany
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Hiraga-Super-Class-A-Amplifier.jpgJean Hiraga's Super Class-A Amplifier6274 viewsRear view of a 58W version of the Jean Hiraga "Super Class-A 30W" Amplifier. The amplifier uses a higher rail voltage along with Toshiba 2SA1943 and 2SC5200 transistors. For full details about this project, see the Jean Hiraga's Super Class-A Amplifier page.
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LM3875-Chipamp-Enclosure.jpgLM3875 Chipamp Enclosure6271 viewsThis is my LM3875 DIY Chipamp / Gainclone . Please see the other pictures for more details.
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dual_channel_2sk1058_2sj162_Mosfet_Power_Amplifier.jpgDual Channel 2sk1058 2sj162 Mosfet Power Amp6264 viewsThis is a dual channel 2sk1058 / 2sj162 mosfet power amplifier, built to be used a main L+R amplifier for my system. I had the amplifier tested after construction to ensure it was within rated specs - each channel is 200W (8 ohm) / 320w (4 ohm) @ 0.003% THD. I have designed a remote turn-on circuit to integrate with my receiver. Each channel has its own power supply with soft start on the line side of toroidal transformers. Cooling is achieved by tunnel heatsink assembly and a PWM fan controller. At start-up fan speed is 30%. Small thermistors are attached to the inside of the heatsinks to monitor temperature. Inputs are electronically balanced.
Ashley Webber
Brisbane , Australia
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K12G-Tube-Amplifier-Kit-Zach.jpgZach's K12G Tube Amplifier Kit6238 viewsFront and rear views of the K12G Tube Amplifier Kit put together by Zach.
For more information about these inexpensive tube amp kits, see the S-5 Electronics DIY Tube Amplifier Kits page.
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P37aFinishedS.jpgElliott Sound Discrete transistor preamp P37A6234 viewsI made this for a very loyal customer with nothing but a schematic and vero-board. Worked first time. Low current draw (~3mA @ +/- 16V). The sound is very clean and flat. This preamp will definitely please the purist solid state amp lovers.
See the project page for the schematic: Minimalist Discrete Hi-Fi Preamp - Project 37, Revision A
More information about this build is available from the Elliott Sound Products Discrete SS Minimalist Hi-Fi Preamp thread.
Mark Houston
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AMPWOOD.jpgWood Frame for Tube Amp Kit6230 viewsBubinga and Walnut wooden frame finished with Tung Oil.
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DSCN0746.JPGK-16LS Customized Tube Amplifier Kit6219 viewsAdded silicone dampers to the tubes and upgraded the lamp-switch power cord to an IEC jack.
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DIY-HiVi-Tower-Loudspeakers.jpgDIY HiVi Tower Loudspeaker 6207 viewsSee the HiVi 3-way tower loudspeaker project page for full details of this speaker. Uses the HiVi F8 woofers, HiVi F5 mid-woofers and HiVi SD1.1A tweeters. Crossover is 2nd order at 500 Hz and 4000 Hz.
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K-16LS-Tube-Amplifier-Kit.jpgK-16LS Tube Amplifier Kit from S-5 Electroncis6206 viewsThis is a stock build of a K-16LS Tube Amplifier Kit available from S-5 Electronics. The tube amp kit comes with a pine board so you will need to find a suitable enclosure you can fit the amp in or you can build you own enclosure.
See the DIY Tube Amplifier Kits page for more information about the various S-5 Electronics kits.
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