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S5-Electronics-K12G-Tube-Amp-Kit-Schematic~2.pngS-5 Electronics K-12G Tube Amplifier Schematic11587 viewsSchematic for the S-5 Electronics K-12G Tube Amplifier Kit. This is a scan of the schematics that comes with the kit. The K-12G kit uses 10GV8 vacuum tubes.
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Bookshelf-Speaker-Modification.jpgModified cheap bookshelf speakers11322 viewsThese started as a $60 pair of speakers but with a new mylar ferro-cooled tweeter, a modified quality replacement cross over, binding posts and additional dampening they sound like 1 million dollars!
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DIY-Phono-Turntable-1.jpgDIY Phono Turntable11096 viewsDo-It-Yourself (DIY) phono turntable. I used MDF filled with concrete / latex added to mix then veneered with Quilted Maple. The bearing is High grade SS and the cup is made of Oilite. The spikes are 2 piece with a rubber damper inside. The Motor is powered by a UPS battery enclosed in the small matching box.
Doug M
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diy-cat5-speaker-cable.jpgDIY CAT5 Speaker Cables10941 viewsDIY Speaker Cables made using Category 5 (CAT5) network wire. The Cat5 cables are braided together as shown in the photo and terminated using banana plugs.
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John-DIY-Class-A-Mosfet-Amplifier.jpgSingle Ended Class A Mosfet Amplifier10930 viewsJohn's build of Mark's Single Ended DIY Class A Mosfet Amplifier.
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DIY-Class-A-Single-Ended-Amplifier-2SK1058-Mosfet.jpgDIY Class-A Single Ended (SE) Amplifier with 2SK1058 Mosfet10868 viewsImplementation of Mark's DIY Class A 2SK1058 MOSFET Amplifier Project. It was difficult to obtain good 10W non-inductive wire wound resistors, so a 12V 20W lamp was used in place of the load resistors. Like in ZenLite Amplifier. :)
Here is a link to more pictures of the amplifier.
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PE-Curved-Speaker-Box-Inside.jpgInside of Curved Parts Express Cabinet10779 viewsInside view of the 0.38 ft^3 Curved Parts Express Cabinet. The baffle fits in tightly and is held in place with four nuts.
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DIY-Phono-Turntable-3~9.jpgDIY Phono Turntable Project10525 viewsI used MDF filled with concrete / latex added to mix then veneered with Quilted Maple. The bearing is High grade SS and the cup is made of Oilite. The spikes are 2 piece with a rubber damper inside. The Motor is powered by a UPS battery enclosed in the small matching box.
Doug M
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Aussieamps-nxV200-V-Fet-200W-Class-D-amp.JPGAussieamps nxV200 V-FET 200W Amplifier10516 viewsI was given the task to assemble two complete stereo amps based on the Aussieamps nxV200 V-FET amp modules. These are exquisitely made extremely compact amp modules based on two large and very powerful V-FETs. The remaining components are surface mounted (SMT). To achieve 200W into 4ohms a +/- 56V was required. The toroid transformer has 40V windings and 20,000 uF 100V caps (per rail and snubbed) are used. Four fast high surge diodes (each snubbed) made up the rectifier.
OFC medium gauge speaker wire was used for hook-up with silver soldier. Large brass cones
hold the amp high off the ground for cooling and resonance control.
The sound is pristine, clean and clear. Stereo image is detailed and 3D holographic. This amp will play extremely loud when pressed showing no signs of harshness or stress. I recommend the amp modules.
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Fostex-FX120-Magnet.jpgFostex FX120 Speaker Mounted on Baffle10443 viewsThe Fostex FX120 Fullrange Speakers have a removable rubber ring that goes around the magnet. The baffle is 1" thick, so I used to router to make a 1/2" chamfer to give the driver some room to breathe. The hookup wire is plain 22 ga copper.
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Mike-DIY-Class-A-Mosfet-Amp1.jpgDIY Class A Mosfet Amplifier - Back10402 viewsRear view of the amplifier build. The amp follows Mark's DIY Class A Mosfet Amplifier Project. More information and pictures are available here.
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Fostex-FE103E-ZigmaHornet.jpgUnfinished Zigmahornets with Fostex FE103E10288 viewsZigmahornet Speakers with the Fostex FE103E fullrange driver prior to staining.
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DSCF1552~3.JPGTransmission Line boxes for Jordan JX92S10279 viewsThese were built by a Melbourne Audio Club member for a pair of Jordan JX92S fullrange speakers (see other image).
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2SK1058-2SK1057-2SK1056-IRFP240-classA-Mosfet-Amplifier.png2SK1058 / 2SK1057 / 2SK1056 / IRFP240 Class A Mosfet Amplifier Schematic10085 viewsSchematic of Ivan's modified version of Mark's simple DIY 2SK1058 Mosfet Amplifier. This version uses a 12V / 20W light for the load resistor.
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DIY-Hi-Vi-Tower-Loudspeaker-Project.jpgHi-Vi Tower-Speaker Project10057 viewsTower loudspeaker project using all Hi-Vi drivers. See the DIY Hi-Vi 3-Way Tower Loudspeaker Project page for more info.
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Goldwood-Open-Baffle-Speakers.jpg8" and 15" Goldwood Open Baffle Speakers10034 viewsGoldwood 8" full rangers whizzers and all (Qts 1.07) which should do the trick for the midbass lacking with the low Qts Fostex FE126E. The Goldwood 8 inchers have great bass in OB compared to the Fostex and really don't need that much bass augmentation.I ran the 8" full range and LP the 15" Goldwood subs in at 60hz. Nice deep bass, nice midbass punch and smooth highs. This speaker has a nice vintage tone that is definitely on the warm side. Just how I like it.
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Fostex-FE-103E-Zigmahornets.jpgZigmahornets with Fostex FE103E10007 viewsA pair of DIY FE103E Zigmahornet Speakers with Fostex FE103E fullrange driver.
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DIY-Interconnect-Wires.jpgDIY RCA Interconnect Cables9899 views24ga shielded silver plated OFC copper twisted pair with Teflon dielectric. Machined RCAs and hardware are from surplus auto interconnects. Including TechFlex and heat shrink, these cost under five bucks.
Related: DIY RCA Silver Interconnect Cables
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Jordan-JX92S-Transmission-Line-Speaker.jpgDIY T-Line Speaker with Jordan JX92S9888 viewsThis is a build of GM's Transmission Line for the Jordan JX92S. More information is available at the Tobler-ONE Jordan JX92S MLTL Speaker Project page.
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DIY-Hi-Vi-3-Way-Tower-Loudspeakers.jpgDIY Hi-Vi 3-Way Tower Loudspeakers9821 viewsDaniel's version of Adam's DIY 3-Way Hi-Vi Tower Speaker Project. Daniel reports that the speakers sound great. More pictures and info about Daniel's build is available at his webpage.
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