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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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1_phono_pre.jpgKit form Phono Preamp6835 viewsPaul's rendition of the MM Phono Preamplifier Kit is both neat and very serious looking. The small instrument case matches a 12AX7 Valve Amplifier of mine that Paul is now using. Paul, like me is very pleased with the sonic qualities of this inexpensive phono preamp kit. He did note it took a day or two to sell to a smoother sound.
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mURI_temp_f1d472f0.jpgDIY Speaker Cable6807 viewsThe cable in the beginning of the project.
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LM3875-Monoblock-Amps.JPGLM3875 Chip Amp Monoblock Amplifiers6805 viewsChip amp monoblock amplifiers based on a retro look and the LM3875 chip.
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New_Set-up_-_Copy.JPGCompleted home theater/living room set up6805 viewsFull range, DIY home theater system, 4 amplifiers, 16-15" passive radiators, and a lot of pride of ownership!
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AMPVIEW.jpgFinished K-12M Tube Amp Kit6791 viewsThe finished S-5 Electronics K-12 Tube Amplifier Kit.
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Mill_1.JPGFront View of the DIY OTL Tube monoblocks6772 viewsWeighing in at 18.5kg's each , these chassis are milled out of Aluminum plate and form part of the main heat sink for the tube sockets that are a precision fit . 6mm thick plate was used through out . The feet are solid with machined slots using cap screws to capture from the inside ( so no holes can be seen )
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DIY-2SK1058-Mosfet-Amp-Night.JPGDIY 2SK1058 Class A Mosfet Amp in the dark6764 viewsSergiy Makharchuk from Russia has put together a version of Mark's DIY Class A 2SK1058 Mosfet Amplifier. Here you can see it lit up in the dark.
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Copper_Steampunk_K-12GTube_Amplifier_Kit_2.jpgCopper Steampunk K-12G Tube Amp Kit - Rear6760 viewsThis is a K-12G tube amplifier kit that I built into a steampunk-ish enclosure. Had a blast with this one, and I'm amazed at the amount of wonderful sound that this little tube amp kit puts out!

I'll be posting construction photos on my blog site if you're interested in taking a look: www.coppersteam.com

Mike Cochran
Key West, USA
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dscf1832.jpgFostex FE127E FS Fonkens6746 viewsDriver is the Fostex FE127E. Veneer is Beeswing Saples. A royal PITA to work with.
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PreAmp.JPGOPA2134 based preamp with balance control.6736 viewsWith the case work complete it will not be long before this OP based preamp is singing along. The case is small about 115 X 85 and cast aluminum. Gain is 3 dB and a balance control has been included. Full details for this project are available at: DIY OPA2134 Preamplifier Project.
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K-8LS-Tube-Amplifier-Kit.jpgS-5 Electronics K-8LS Tube Amplifier Kit6735 viewsS-5 Electronics K-8LS Tube Amplifier Kit on the work bench for testing.
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dscf1833.jpgFostex FE127E FS Fonkens6734 viewsHere is the setup in the basement. The new Audio Nirvana Super 12s are what are sitting on the Fostex FE127E Fonkens. I am breaking them in and will be building bass reflex cabinets soon.
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DIY-HiVi-SP10-Subwoofers.jpgDIY HiVi SP10 Subwoofers6711 viewsDaniel's build following Adam's DIY HiVi SP10 Subwoofer Project. Daniel reports that the subwoofers produce low frequencies which are accurate and very well defined. There are many more pictures and information about Daniel's build at his webpage.
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2SK1058-SE-Mosfet-Amp.jpg2SK1058 Single-Ended (SE) Amplifier6692 viewsThis Class-A power amplifier with zero negative feedback and 5W output audio power was built based on the schematic of the DIY Class-A 2SK1058 MOSFET Amplifier project by Mark Houston.

The amplifier uses a custom handmade choke coil.
The power supply uses 4 x 15000 µF Towa capacitors designed for Adcom.
Two large heatsinks and one 88mm fan provide enough cooling to keep the temperature below 60°C.
The amplifier is used with custom made sensitive acoustics.
The sound is very precise and detailed. It has deep sound staging and amazing microdynamics.

For more pictures please visit http://alexkap.com/.
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sm-Mains_final_Crossover.jpg3-Way Crossover6664 viewsCrossover for my main speakers with twin Lambda 12 TDs mid woofers, 4 passive radiators, 2 scan speak mids, and HIVI research RT2II tweeter
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bass_table.jpgSubwoofer Coffee Table6660 viewsA subwoofer which has been transformed into a coffee table.
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Diaphony4.jpg"Diaphony's" An open baffle design6630 viewsConstruction
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Freds-Place-SAR-Labs-STA80.jpgListening Session at Fred's Place - April 20106618 viewsPhoto of the listening session over at Fred's place in April 2010. Components shown in the photo are:
SAR Labs STA80 KT88 Tube Amp with JJ KT88 Blue Glass tubes (top left)

OddWatt Audio DIY KT88 Push-Pull Monoblock Tube Amp Kits with Gold Lion KT88 tubes (bottom middle) put together by Gio.

The small speakers are from a Tang Band D4-1 DIY Back Horn Speaker Kit put together by Gio.

And the large Fostex FF85K Eminence Alpha 15A Open Baffle Speaker were built by Keith.
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Fostex-FE127E-DIY-Bass-Reflex-Speaker-1.jpgFostex FE127E DIY Bass Reflex Speaker6590 viewsClose up view of the finished bookshelf speakers. The speakers are based on the plans of Rabbitz Fostex FE127E DIY Bass Reflex Bookshelf Speakers.

The woodworking and painting of the cabinets were completed by a friend.
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Feastrex-NF-5-Bass-Reflex-Enclosure.jpgFeastrex NF-5 Bass Reflex Speakers6582 viewsThe lovely Feastrex NF-5 fullrange drivers on display at the 2011 Salon Son & Image show. The single fullrange drivers were housed in a bass reflex enclosure and driven by a Mastersound Compact 845 SET amp.

See the Feastrex NF-5 and NF-5ex Drivers SSI 2011 report for more details.
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