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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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The_SetUp.JPG
The_SetUp.JPGLow noise mic preamp5468 viewsAfter preforming an on street recording of a classical busker with my Cowon mp3 in Florence I decided I wanted to do more recording. The Sony ECM-MS957 stereo mic (not made any more) had too low output to drive my mp3 player line-in or laptop digitizer so I made this low noise, two stage transistor (BC549) preamp (red lid). Because I used large 10uf polypropylene capacitors to ensure high quality sound recordings the preamp, though portable with internal batteries (12V), is quite large. Now I can use my mp3 player (128kps) to make quality recordings anywhere. There is no hiss or processing noise at all. The preamp is dead quiet. The preamp from the ESP site and is extremely easy to build. I use silver wire and silver solder throughout and gold connectors where possible. You can use 10uF electrolytic capacitors where I used polies but for the very best sound use the polyester capacitors. The designer suggests this in his text.

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2-channel-Hi-Fi-Setup.jpgGio's Two Channel Hi-Fi Setup5449 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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S5-Electronics-K12-Tube-Amp-Kit1.JPGS-5 Electronics K-12 Tube Amp Kit (220V)5410 viewsAnother S-5 Electronics Tube Amplifier Kit from down under. This one uses a 220V transformer from Gammatron at Salisbury. The amp is dead silent and has fantastic bass and the sound stage is better than anything I have heard.

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Underside.JPGPartial Wiring Close up5407 viewsPoint to point wiring is a must in my opinion to achieve what you owe yourself , when it comes to turning the piece of art on . I just wish I could of shown my grandfathers what I have built. This shot shows some of the input stage power supply , Hexfreds , Precision resistors from PRP , and a snippet of the output power supply cap banks for the + / - DC rails that make up the 140 VDC supply.
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K-12G-Tube-Amp-Kit-S5-Electronics.jpgS5 Electronics K-12G Tube Amplifier Kit5404 viewsA completed K-12G Tube Amplifier Kit by Jason Sartor from Temple Arizona. The kit uses 10GV8 tubes and is housed in a nice looking DIY enclosure.
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DIY-Zigmahornet-Loudspeakers-Merrill-4_4-drivers.JPGZigmahornet Loudspeakers with Merrill 4.4 Fullrange Drivers5403 viewsThis was my first attempt at speaker building. They are Zigmahornet Speakers with Merrill 4.4 fullrange speakers instead of the Fostex FE103E. I chose black paint because it fit with the TV and TV stand/stereo cabinet that I have plus it hides my questionable workmanship. All in all, I really enjoyed making them and with the Merrill drivers they sound great with a surprising amount of bass from such a small driver.
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DIY-TDA2050-Mini-Gainclone-Chipamp.jpgTDA2050 Hi-Fi Chip Amplifier (chipamp)5400 viewsInside view of my "Mini Gainclone" - a TDA2050 Hi-Fi Chip Amplifier (chipamp). Output is about 25W and the amplifier is built on a protoboard. The power supply contains a 120VA torroidal transformer, 10,000uF capacitors and generally follows the "snubberized" gainclone power supply design. For full details, see the DIY TDA2050 Hi-Fi Chip Amplifier project page
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NCDIYMeet042010a.jpgNorthern California DIY Audio meet Roseville, CA 04/24/20105382 viewsNice meeting with Sigfried Linkwitz guest speaker
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DIY-HiVi-Swans-M1-Speakers.jpgDIY Swans M1 Speakers - HiVi Research5378 viewsDIY build of the Swans M1 Speakers from HiVi Research.

See DIY HiVi Research Swans M1 Speakers
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MicroStudio.JPGDIY Mini Recording System5375 viewsBased around the Sony ECM-MS957 stereo microphone (discontinued) and Cowon i6 mp3 player, I built a quality mic preamp to complete this mini-recoding studio. All components are high quality and excellent recordings can be made with no other equipment required. The idea is to keep this portable but to retain quality of recordings. From microphone to digital transfer provides clean, crisp, noise free recording. All battery powered the system sits easily on a table top at your local jazz club to record the music and the vibes.
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AMPWOOD.jpgWood Frame for Tube Amp Kit5369 viewsBubinga and Walnut wooden frame finished with Tung Oil.
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K-12G-Tube-Amp-Kit-Wine-Box.jpgK-12G Tube Amp Kit in a Wine Box5365 viewsA K-12G Tube Amplifier Kit built into a wooden wine box.

Thread: K12G In A Wine Box ..
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IMG_2158.JPGNoyMark CS8412 + 8 x TDA1541A parallel battery powered nos dac project5355 viewsI built a few big power set tube amps with big triodes such GM70, 833. I wanted to do something different and completed my first diy nos battery powered DAC project. It use CS8412 as digital receiver and 8 X PHILIPS TDA1541A parallel as dac circuit. As buffer, i used two mono opamps OPA627. It uses no digital or analog filter. Sounding incredible natural (even one of my friend describing it as organic), warm and also detailed. Very silent background. I am very happy to do this equipment, otherwise i had to pay very big money for same sound. After charging the batteries, it works more than 10hours continuously. When i turn off the dac, it charges the batteries automatically. You can see other photos below:
http://stereomecmuasi.com/forum/viewtopic.php?f=46&t=965
http://stereomecmuasi.com/cihazlar/muziksayi3/noymarkdac.htm
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PeerlessSeas2way~0.jpgPeerless and Seas 2-way Towers in Zebrawood5353 viewsThe fun part about building these speakers was the crossover design with a Zobel and Baffle Step Compensation (BSC). I wanted to try a larger driver than a 6.5 inches. I am really pleased with the sound and image. Unbelievable sound for the cost. The crossover uses open air inductors and Solen capacitors. The Veneer is Zebrawood adhesive backed. I was able to match the grain on both sides and the fronts. One coat stain and finish followed by paste wax. The speakers are drying in the garage awaiting the living room. Next is a pair of open baffle 3 way with active cross using DIY chip amps.
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6SN7-6L6-Tube-Amp-4.jpg6SN7-6L6 Tube Amp Top View5345 viewsTop view 6SN7, 6L6 Tube Amp.

Link to the schematics for this tube amp: Williamson 6SN7 - 6L6 (KT66) Tube Amplifier
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Finished-AMP6-T-Amp-Front.jpgAMP6 T-Amp (Class-T) - Front5327 viewsFront view of finished DIY AMP6 T-Amp kit.
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Diaphony7.jpg"Diaphony's" An open baffle design5319 viewsConstruction
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Diaphony3.jpg"Diaphony's" An open baffle design5317 viewsConstruction
K-16LS-Tube-Amplifier-Kit.jpg
K-16LS-Tube-Amplifier-Kit.jpgK-16LS Tube Amplifier Kit from S-5 Electroncis5316 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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Nigel-K-12G-Tube-Amplifier-Kit-Build~1.jpgK-12G Tube Amplifier Kit Build5292 viewsNigel's build of a K-12G Tube Amplifier Kit.

For full details of Nigel's build, see his K-12G Tube Amp Kit Build thread.
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