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DIY-Granite-Speakers.jpgDIY Granite Speakers5907 viewsThese are granite speakers that Radoslav from Slovakia has put together. The bookshelf sized loudspeaker uses the Seas G17REX/P woofer and Seas 27 TFFC tweeter with a 2nd order XO at 2500 Hz.
For full details, see the DIY Seas Granite Speaker project page.
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6L6-5881-SE-Tube-Amp.jpgSingle-Ended (SE) 6L6 / 6L6GC / 5881 Tube Amp5904 viewsCutoff pentodes (6SJ7 or 6SD7) are used to drive 6L6 or 5881 output tubes. Tungsram 6SJ7 and Sovtek 5881WXT tubes are shown in the photo. The power supply is solid state and DC is used on the tube heaters.
The OPT covers are made from copper clad board and the enclosure is all aluminum and hand made.
See the DIY Single-Ended (SE) 6L6 / 5881 Tube Amplifier project page for more information.
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K-12G-Tube-Amp-Kit-finished-cmetzner~1.jpgFinished K-12G Tube Amplifier Kit5900 viewsA S-5 Electronics K-12G tube amplifier kit built into a diy enclosure. The small vacuum tube amplifier sounds terrific with high sensitivity 6" Audio Nirvana speakers.
For more information about these inexpensive tube amplifier kits see the S-5 Electronics DIY Tube Amplifier Kit reviews.
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Finished-AMP6-T-Amp-Front.jpgAMP6 T-Amp (Class-T) - Front5881 viewsFront view of finished DIY AMP6 T-Amp kit.
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Nelson-Pass-Bride-of-Zen-BoZ-Preamplifier.jpgNelson Pass Bride of Zen (BoZ) Preamplifier5880 viewsThis is my slant on Mr Pass’s Bride of Zen (BoZ). Big Ruskie 0.1uF 40y-9 PIO military caps handle front-end de-coupling while 10uF polypropylene caps sit at the back. The 40y-9 caps are foil, paper in oil, glass encapsulated then metal encapsulated and sound divine. An Alps blue velvet potentiometer attenuates the input controlled by a 4 oz solid brass knob. Metal film resistors and silver plated wire wrap wire add quality to the custom build. This preamp is built on a strip board. The JFETs are 2SK170 BL. The RCA plugs are gold plated, 5% WBT silver solder is used throughout. Two 10,000uF caps (snubbed) ensure a dead quiet supply and loads of bottom-end. The enclosure is a Hammond anodized Aluminum case.
Nice Mongrel Dog.
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K-16LS-Tube-Amplifier-Kit-Modifications.jpgK-16LS Tube Amplifier Kit with Modifications5872 viewsHere are a couple of photos of Andy's K-16LS Tube Amplifier Kit. The enclosure is a Hammond 16" x 8" x 3" aluminum chassis. The original audio output transformers are 5K6 OPT's from an ELLA amplifier. For more information about Andy's build and modifications, see his webpage.
More information about these kits is available at the S-5 Electronics Tube Amp Kit page.
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Mill_2.JPGRear View of the DIY OTL Tube Amps 5849 viewsThe chassis of my amps were machined in this German Milling machine - a real beast . It had to be repaired at a few stages just to complete the build. You can see the torodials that are used for the Driver stage ( smallest ) ..The Heaters ( next largest 6.3vac @ 32A ) and the Output Power supply ( the largest toroid - 1KVA @ 100 VAC )
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PradaInsideBack.jpgPrada OPA627 Preamplifier - inside5805 viewsI was inspired to build this preamp by learning of the Burr-Brown OPA627 (very high performance OP amp) and access to my daughter's Prada phone, heavy cardboard, container. The preamplifier modules are constructed on vero proto boards. Only component wire was used here. The input caps are Cornell Dubilier (white) and Solen (black) was used for the output). Metal film resistors, all pure silver hookup wire, gold RCAs jack and WBT silver solder make this a quality build. The box is lined with bitumanised aluminum foil and an Alps Blue Velvet attenuator and 4oz solid brass black knob add to this build. Four 9V lithium batteries (1200Ah each) drive the unit.
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S5-K16LS-Tube-Amp-Kit-Mahogany.jpgK-16LS Tube Amp Kit (16W)5790 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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EL84-Single-Ended-Tube-Amp.jpgTesting a DIY SE EL84 Tube Amp5763 viewsHere I am testing the Single Ended EL84 Stereo Amplifier. The whole AMP fits on a 100 by 160 mm DIY PCB. A double triode ECC88 / 6DJ8 or ECC82 tube is used to amplify the input signal. See other photo for the finished amplifier and more details.
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Velleman-DIY-Audio-Kits.jpgTwo inexpensive Velleman kits5729 viewsA preamp & amplifier kit that I'm going to combine to make a small integrated amp.
The preamp has volume and separate bass & treble controls.
The amplifier uses a TDA1521 IC.
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SV100870.JPGOP Amp Preamp - from the rear5695 viewsFrom the rear of the case you can see the power connection (for 18V 1.2A regulated wall wart) gold output and input connections. More information for this diy audio project is available at the DIY OPA2134 Preamp Project page.
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ProJect-Debut-III-Phono-USB.jpgPro-Ject Debut III Phono USB 5662 viewsI just read about this new turntable with a USB out.
This manual turntable has an integrated MM phono preamp with A/D converter and USB output. Retail price is expected to be about $550.
More info is available at their website: http://www.project-audio.com
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2nd_monoblock.JPGUnderbelly shot of the DIY OTL Tube monoblock5634 viewsStrangely enough , the second was made intentionally Mirror Image , but I had neglected the fact that the Toroids had the same winding tail positions , so the build wasn't perfectly mirror image after all . This actually was a bit of a headache , since the first was more ideally layed out in electrical design & visual eye candy
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DIY-TDA205-Chip-Amplifier-Enclosure.jpgDIY TDA2050 Chip Amplifier (chipamp)5632 viewsThe finished "Mini Gainclone" amplifier that is built using the TDA2050 IC. See the DIY TDA2050 Hi-Fi Chip Amplifier project page for full details. The enclosure is made from a Hammond satin black steel 12" x 8" x 3" chassis (Model 1441-24).
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Don-SE-807-Tube-Amplifier.jpgSingle-Ended 807 Tube Amplifier5609 viewsI have stated in the past that my mate Don makes an amp a month. This month Don has completed an 807 amp based on a schematic designed by Matt from the USA and the same as I built a short time back. I took a short listen and thought it OK but a much longer review is required. Don’s iron is wound by Dyne which is near us (Melbourne, Australia) and Don’s superb enclosure bases are made by him from, once more, Australian Spotted Gum. Top plate is once more ABS and OPTs are James. This not only a smart looking amp but with some high quality passives under the bonnet and again a very neat wiring layout. In this build JJ filters caps were used. Don has another amp in the pipeline so stayed tuned. About one month from now (lol).
Mark Houston – retro-thermionic
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CMoy-Headphone-Amplifier.jpgCMoy Headphone Amplifier5598 viewsCMoy Headphone Amplifier with 470uF capacitors and one 9B battery for the power supply. The opamp chip is a Burr Brown OPA2134PA. The enclosure is a Hammond 1455.
See the new CMoy Headphone Amp build thread for more information.
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DIY-6NS7-KT88-Tube-Monoblocks.jpgDIY 6NS7-KT88 Monoblock Tube Amps5584 viewsI purchased these extreme valve monoblocks from Dan in Australia, who built them from the ground up, for a song. They are based on the uni-amp cct. brd. You can plug and play KT88(s), 6L6(s) and EL34(s) output valves and switch between pentode and triode mode. The transformers are oversized and were special wound for Dan. Each block weighs over 22kg. The input and driver tubes are Golden Dragon 6SN7(s) with tube rectification. It uses tranni input coupling. Power is 27W.
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12AX7-Tube-Preamp-Kit.jpgDIY 12AX7 Tube Preamplifier Kit5583 viewsThis is my build of the Silicon Chip Magazine 12AX7 DIY Tube Preamplifier Kit. All of the coupling capacitors were upgraded to Auricaps. The volume control is an ALPS pot from Radio Shack
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IMG_1872.JPGriverrat373's K-502 Valve Amplifier Kit - Front5578 viewsFront view of the K-502 Tube Amp Kit without the transformer cover.
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