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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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DSCN0450S.jpg6S4S & 6J9P SE tube amplifier project2303 viewsMy new single-ended class-A amplifier using 6S4S and 6J9P tubes.Sep 19, 2010
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la2a.JPGteletronics la2a DYI clone2209 viewsThis a studio compressor / limiter using a opto-coupler clone. Parts are original NOS UTC transformers and opto with NOS tubes and Sovtek with Hammond power transformer.Sep 15, 2010
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ECL86_SE.JPGECL86 Single-Ended Amplifier3157 viewsSingle-Ended monoblock amplifier using ECL86 / 6GW8 tube.Aug 31, 2010
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K12G-Tube-Amplifier-Kit-Zach.jpgZach's K12G Tube Amplifier Kit4908 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.
Aug 28, 2010
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K12G-Tube-Amplifier-Kit-Inside-Zach.jpgUnderside of Zach's K12G Tube Amplifier Kit4292 viewsThis is an underside view of the K12G tube amplifier kit put together by Zach. You can see that Zach has tried some of the various modifications noted for this kit.

For more information about this tube amplifier kit and possible modifications see the S-5 Electronics DIY Tube Amplifier Kits page
Aug 28, 2010
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000pbs6w.jpg25L6G Tube Stereo Amplifier2616 views25L6G Tube Stereo Amplifier
A work in progress. This is only an assemblage of parts so far with nothing bolted together, but it gives sort of a preview of the finished project. The chassis will be painted black wrinkle much like the transformer covers in the back. The driver tubes are 12SN7s and 6SL7s
-Steve (zstrat)
Aug 23, 2010
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DIY-ECC802S-12AU7-ECC82-Vacuum-Tube-SRPP-Preamplifier.jpgDIY ECC802S Tube SRPP Preamplifier2420 viewsThis fantastic looking piece is a ForeWatt ECC802S tube SRPP preamplifier by Bruce. The gain of the preamp can be set at 7 or 11. 12AU7 and ECC82 tubes can also be used. The power supply is solid state.

For full details see the ForeWatt DIY ECC802S (12AU7 / ECC82) Vacuum Tube SRPP Preamp project page.
Aug 22, 2010
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IMG_1943-1~1.JPGNP-100v12: 12AU7 / IRF510 Single Tube Headphone Amp2080 viewsHere's my version of the NP-100v12: 12AU7 / IRF510 Single Tube Headphone Amp, with it's companion regulator, running from an orphaned laptop power pack.

I added a simple headphone output delay during tube warmup, essentially a clone of the e12 delay from Millet Max: http://www.diyforums.org/MAX/MAXe12.php

The regulator side-kick is simply 3 50V, 1000uf capacitors before an LM317M regulator, also cobbled from the Millet Max (but without the need for the bridge diodes): http://www.diyforums.org/MAX/MAXps.php. Works swell and no noise. Audio is incredible.

Mike Y in Dallas
Aug 12, 2010
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Visaton-BG-17-Voight-Pipe-Speakers.jpgVoight Pipe Speakers Visaton BG 17 driver8668 viewsA set of voight pipe speakers built around the Visaton BG 17 full-range speaker driver. The speaker is finished with a decorative bamboo mat finish.

See the Voight Pipe Speakers with Visaton BG 17 build thread on the DIY Audio Projects Forum for more information and photographs.
Aug 09, 2010
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TDA2003-Chip-Amplifier-Visaton-FRS-8-M-Sphere-Speakers.jpgTDA2003 Chip Amplifier with Visaton FRS 8 M Sphere Speakers5560 viewsDIY TDA2003 Chip Amplifier build in a wooden enclosure matched with a pair of Visaton FRS 8 M Speakers in a Sphere enclosure. This set of amp and speakers is used for a PC audio setup.

For more information, see the tda2003 chip amplifier and Visaton FRS 8 M sphere speakers thread on the forum.
Aug 09, 2010
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KiSharnS.jpgretro-thermionic Pinot "KiSharn" SET 6AS72203 viewsThough only a small difference between this photo and the last the Pinot "KiSharn" continues to impress and compete well against commercial amplifiers costing AU$5K. I am now running it with SED Wing ā€œCā€ tubes which look and sound very close to the United Electronics tubes it started with. An audibly impressive amp which belies its functional simplicity.Aug 06, 2010
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PinotAssembleIISS.jpg6AS7 SET amplifier with JAN 5R4 rectifier tube2248 viewsThis compact amp is based on an 6AS7 (dual triode), JAN 5R4 (both coke bottle) and 12AX7 driver tube. The top plated is sprayed to match the Edcor OPTs (1.7k/8ohm). The base is solid Mirbeu. Power transformer is Hammond and so is the choke. Component-2-component wiring with no PCB. Silver wire connects gold RCAs to the driver tube. Jensen (0.22uf 630V) copper paper and oil caps join the driver and power stages. The 6AS7 are pushed to 13W dissipation. Bass is heavy and extended, mids and treble highly detailed and sound stage very deep and defined. An extremely good looking and great sounding amp.

Additional information is available in the 6AS7 tube amp from layout to listening forum thread.
Jul 26, 2010
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tube_amplifier.jpg5692 / 8417 SE Tube Amplifier2312 viewsThis amplifier was built to reproduce music playback with high fidelity. The sound is light and natural. One doesn't get tired of listening to it for many hours. The voice sounds softly and naturally without tension. The amplifier has great microdynamics. The preamp is built based on tube 5692. The power amplifier uses tubes 8417. The tubes can be replaced with different ones: 6L6, 6L6GC, KT88, 6V6 and alike. In this case, the current of the output tubes can be tuned. The output transformers are Hashimoto HC-507U 5K. For more pictures, please visit http://alexkap.comJul 17, 2010
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ZCA_1~1.jpgRadoslav's ZCA (SE class-A mosfet amp)3648 viewsRadoslav's ZCA. It has a massive PS with nearly 68,000uf of filtering and a twin secondary tranni.

Schematic and details are availabe from the project page: DIY Class-A 2SK1058 MOSFET Amplifier.
Jul 11, 2010
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ZCA_2.jpgRadoslav's ZCA (SE class-A mosfet amp) 4300 viewsRadoslav has made a very professional looking build of the ZCA.

See the project page, DIY Class-A 2SK1058 MOSFET Amplifier for the schematic.
Jul 11, 2010
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12AU7-IRF630-LM317-headphone-amplifier.JPG12Au7 / irf510 Headphone Amp2786 viewsThis is the final amplifier. Takman metal film resistors everywhere except for the pink ones (cathode resistors) which are carbon film. Elna Silmic II Electrolitic capacitors and Solen film capacitors. The sound is great!

Project Link - DIY 12AU7 (ECC82) / IRF510 Headphone Amplifier
Jul 08, 2010
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071.JPGsaba open baffle speakers5933 viewsThe system so far. Project Debut III with acrylic platter and Speed Box II, Cambridge Audio 640P phono stage, DBX 223 XL active crossover, Decware SE84C+ set amp for the mid/high freq, Trends TA 10.1 for the low freq, endorphine P-17 open baffle speakers with emminance Delta 15A and SABA greencone oval with Grundig 4" used for tweeter until the SABA tweeter arrives. Jul 07, 2010
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057.JPGsaba open baffle speakers7074 viewsThe system so far. Project Debut III with acrylic platter and Speed Box II, Cambridge Audio 640P phono stage, DBX 223 XL active crossover, Decware SE84C+ set amp for the mid/high freq, Trends TA 10.1 for the low freq, endorphine P-17 open baffle speakers with emminance Delta 15A and SABA greencone oval with Grundig 4" used for tweeter until the SABA tweeter arrives. Jul 07, 2010
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BeBampDStage6SN7ss.jpgBe Bamp 6SN7 remote driver-under the bonnet2166 viewsUnder the bonnet of the new 6SN7 Be Bamp remote driver stage can be seen the Russian 0.47uf paper, foil and oil caps (green) and component layout. The bi-pass caps are low ESR types and the filter cap was snubbed. Only additional wire used was the filament wire and two earth connections. The assembly method was component-2-component wiring. No hook-up wire was used in the signal path at all and the signal path is very short. Tube socket is ceramic with gold plated pin connects.

This driver stage out-performs the original 6N1P stage, to my ears anyhow. Better bass, deeper, better textured sound stage, extended reverb and a warmer sound in the mid-range.
Jul 05, 2010
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BeBampDriver6SN7s.jpgBe Bamp 6SN7 remote driver stage2280 viewsThis is the second of the remote driver stages for the Be Bamp . It uses one 6SN7 on a cast aluminum chassis with a epoxy enamel paint. The finish is Hammered Copper. Again the Russian military caps of foil, paper and oil will be used as the inter-stage caps.

Wire will be cotton coated tinned copper and all silver solder. Socket is ceramic and the tube will be running on 350V HT+.
Jun 30, 2010
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