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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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K-12G-Tube-Amp-Kit-Wine-Box.jpg
K-12G-Tube-Amp-Kit-Wine-Box.jpgK-12G Tube Amp Kit in a Wine Box6192 viewsA K-12G Tube Amplifier Kit built into a wooden wine box.

Thread: K12G In A Wine Box ..
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SV101783.JPGOpen Baffle Speakers - Front6190 viewsI had a very large sheet of 18mm particle board which had been sitting around for years. Also a pair of titanium domed tweeters and 2" domed mid-range surplus. What to do with them? With the addition of a pair of cheap but very robust 10" woofers and a 2nd order Xover (600Hz & 3.5kHz) I thought a may knock-up a pair of OBs.

I allowed one day to build these from scratch and with the assistance of some massive angle brackets and a few meters of darcon here is the result. That total height and depth of the speakers is covered in two thick layers of darcon leaving only the woofer rears bare.

The woofers are stiff and require many hours of play to get them to full performance. But the speakers have an excellent sound stage bright mids and highs. Bass is OK but not deep.
Jean-Hiraga-Super-Class-A-Amp.jpg
Jean-Hiraga-Super-Class-A-Amp.jpg58W Jean Hiraga Super Class-A Amplifier6189 views58W version of the Jean Hiraga "Super Class-A 30W" Amplifier. This version uses a higher rail voltage and Toshiba 2SA1943 and 2SC5200 transistors. For full details, see the Jean Hiraga's Super Class-A Amplifier Project page.
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mURI_temp_630f4f06.jpgDIY Speaker Cable6186 viewsThis is DIY Speaker Cable that I made for a friend.
This is the regular twisted pair design with the double shielding. I've used the regular heat shrink tube for the primary shield and nylon braided sleeve for the secondary shield.

The ends are terminated via plastic banana pins.

Also, here is a pair of DIY Braided Speaker Cables that I made.
Diapony_sandOrion.jpg
Diapony_sandOrion.jpgDiaphony' and Orion6179 views04/2010 Northern California DIY Audio meet
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S5-Electronics-K12-Tube-Amp-Kit.JPGS-5 Electronics K-12 Tube Amplifier Kit6176 viewsThis is a S-5 Electronics K-12 Tube Amplifier Kit. I run a Cambridge Audio Azure 540C CD player into it and it feeds a pair of 70L 12" 3-ways - the classic '70's speakers - a kit from Macs Hifi ( no longer there) in Adelaide. They are very efficient as you would expect - and have been upgraded several times with new drivers and crossovers.
TDA2003-Chip-Amplifier-Visaton-FRS-8-M-Sphere-Speakers.jpg
TDA2003-Chip-Amplifier-Visaton-FRS-8-M-Sphere-Speakers.jpgTDA2003 Chip Amplifier with Visaton FRS 8 M Sphere Speakers6170 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.
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1.jpgK-16LM 16W Mono Tube Amp Kit6160 viewsThis is the K-16LM mono 16W tube amplifier kit, with Russian PIO capacitors and carbon composite resistors. This Mono Integrated Tube Amplifier utilizes a 5670 triode and 6005 pentode tubes push-pull. It has been converted for use as a guitar amp.

Here are photographs of the guitar amplifier that was built with with tube amp kit.
DIY Guitar Amplifier - Inside
DIY Guitar Amplifier
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IMG_1869.JPGriverrat373's K-502 Tube Amplifier Kit - Front6150 viewsK-502 Tube Amp Kit without transformer cover and tubes.



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Jordan-JX92S-Transmission-Line-Loudspeakers.jpgJordan JX92S Transmission Line Loudspeakers6129 viewsThe Jordan JX92S fullrange drivers in solid oak MLTL cabinets. These sound great. See my site for more details.
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DSC_0168.jpgS-5 Electronics K-12M at Northern Californial DIY Event6129 viewsHere the S-5 Electronics K-12 Tube Amp is on display at a Northern Californial DIY Event.
LM3875-Gainclone-Breadboard.jpg
LM3875-Gainclone-Breadboard.jpgLM3875 Gainclone on Breadboard6125 viewsLM3875 Gainclone. The circuit is the same as Mark's LM3875 Gainclone. Most of the parts are from Dick Smith which can also be found at Radio Shack.
K-12G-Tube-Amp-Top.jpg
K-12G-Tube-Amp-Top.jpgFinished K-12G Tube Amplifier Kit6082 viewsThis is Lofton's build of the S-5 Electronics K-12G Tube Amplifier Kit. Rather than use the supplied PCB, this build is done a turret board. Additional details and photographs for this build are available in the K-12G Tube Amp Kit Build Thoughts thread on the message forum.
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S-5-Electronics-K-12-Tube-Amp-Kit.jpgS-5 Electronics K-12 Tube Amplifier Kit6077 viewsRear view of my build of a S-5 Electronics Tube Amp Kit. The enclosure is made from MDF and painted with a high temperature resistant black paint. The back holes are just an air intake for the fan.
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SV100841.JPGInside the Step-up tranni box for MM cartridge6040 viewsThe inside of the box is lined with sticky bituminised-aluminum foil and speaker dampening vinyl. Pure silver wire, gold connectors and silver solder are used throughout. Velcro pads hold the transformers in place. The step-up transformers are wired for 6 dB gain. For more information, see my project write-up on the DIY Lundahl Moving Magnet Phono Step-Up Transformers.
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Nigel-K-12G-Tube-Amplifier-Kit-Build~1.jpgK-12G Tube Amplifier Kit Build5998 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.
Diaphony3.jpg
Diaphony3.jpg"Diaphony's" An open baffle design5996 viewsConstruction
LM3875-Chipamp-Enclosure.jpg
LM3875-Chipamp-Enclosure.jpgLM3875 Chipamp Enclosure5989 viewsThis is my LM3875 DIY Chipamp / Gainclone . Please see the other pictures for more details.
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K-12G-Tube-Amp-Kit-S5-Electronics.jpgS5 Electronics K-12G Tube Amplifier Kit5962 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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AMPTILT.jpgS5 Electronics K-12M Tube Amp Kit - Side View5928 viewsSide view of the K-12M Tube Amp Kit showing the circuit board underneath and transformers and tubes above.
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