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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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Fostex-FX120-Frequency-Response-150mm.png
Fostex-FX120-Frequency-Response-150mm.pngFostex FX120 Frequency Response8008 viewsFrequency Response plot of a Fostex FX120 Fullrange Speaker. The measurements were made on-axis at 6 inches (150 mm) from the driver using a Radio Shack 33-2050 SPL Meter.
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2.jpgDIY Guitar Amplifier - Inside7987 viewsHere is a photograph of the inside of the cabinet. You can see the K-16LM mono 16W tube amplifier kit mounted to the top. At the bottom there is a tiny General Electric 6SC7 tube preamp. Nice tube clipping!
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Fostex-FE126E-Rear-Loaded-Horn-Speaker.jpgRear Loaded Horn Speaker with Fostex FE126E7962 viewsThis is a diy rear loaded horn (back loaded horn - BLH) speaker that uses the Fostex FE126E fullrange speaker driver.
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dscf1831.jpgFE127E FS Fonkens7851 viewsFull size Fonkens with the Fostex FE127E Fullrange Driver.
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DIY-Panasonic-Fullrange-Speaker.jpgPanasonic Fullrange Speakers7793 viewsThese are speakers I built using Panasonic Fullrange Drivers for my Single Ended EL84 Tube Amp.
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ikyaudio_sound_pipes_small_1.jpgDIY PVC Pipe Speakers with HiVi B3N driver and HiVi T20-8 tweeter 7793 viewsThe speaker enclosures are made using various PVC pipe sections. The PVC pipe enclosure houses a 3-inch HiVi B3N fullrange driver and a HiVi T20-8 textile dome tweeter. The enclosure is tuned through a rear firing bass port. There is a 2-way crossover inside the enclosure and the binding posts are on the back. The speaker sits on a wood platform with spikes. The frequency range is about 65 to 20,000Hz . There is a nice sound stage and pretty good low end response considering the small size of the driver and enclosure. I would love to hear your comments about this HiVi B3N / T20-8 PVC Speaker project.
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Copper_Steampunk_K-12GTube_Amplifier_Kit.jpgCopper Steampunk K-12G Tube Amp Kit7772 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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Scanspeak-8531-D3004-6600-00-T-Line-1.jpgScanSpeak Revelator 8531 MidBass and D3004-6600-00 Tweeter in Transmission Line Enclosure7767 viewsScanSpeak 8531 mid-bass and Scanspeak Revelator D3004-6600-00 Aircirc tweeters. The midbass is in a transmission line housing, and the tweeter in a separate decoupled enclosure. Close up view.
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Copy_of_Turntable_092.jpgDIY Turntable7706 viewsThis is the Finished Turntable with Dynavector DV10X5 MC on one tonearm and a Shure M97XE on the other. Both tonearms were extended and DIY Headshells were used. The Sealed Lead Acid Battery does a great job powering the TT and with only an hour or two listening per day, lasts all week (Maybe longer??)
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LM3875-Gainclone-Protoboard.jpgDIY LM3875 Gainclone on Protoboard7452 viewsAnother view of the LM3875 Gainclone on a Protoboard. The schematic is the same as Mark's DIY LM3875 Gainclone project. All of the parts (except the chip) are from Dick Smith and can also be found at Radio Shack in the US.
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Scanspeak-8531-D3004-6600-00-T-Line-2.jpgScanSpeak Revelator 8531 MidBass and D3004-6600-00 Tweeter in Transmission Line Enclosure7451 viewsThese loudspeakers were designed around the ScanSpeak 8531 carbon paper mid-bass and Scanspeak RevelatorD3004-6600-00 Aircirc tweeters. The midbass is in a transmission line housing, and the tweeter in a separate decoupled enclosure.
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Open-Baffle-Speaker-Ciare-CH250-Front.jpgOpen Baffle Speaker with Ciare CH2507451 viewsI have assembled the Ciare CH250 full range driver into an open baffle panel (birch plywood). Size of the baffle: height 80 cm, width 90 cm, thickness 18mm. The plans are the Open Baffle Plans from Stereo Sound "Tube Kingdom". The Ciare's are running without any filter network and sound surprising good.

See my blog for more information - Open Baffle mit Ciare CH250.

Carsten (Germany)
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IRF610-MOSFET-Headphone-Amp.jpgDIY Class A Headphone Amplifier7446 viewsPutting the final touches on a Class A headamp project. An IRF610 MOSFET is used for the output device and a LM317 regulator makes up a constant current source (CCS). See the DIY IRF610 MOSFET Class A Headphone Amplifier Project page for full details.
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K-12M-Tube-Amplifier-Kits.jpgK-12M Tube Amplifier Kits7444 viewsThree of Mark's K-12M tube amplifier kits. More information about the enclosure construction is available at the project page: A Case for the K-12M Tube Amplifier Kit .
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Fostex-FX120-DIY-Bass-Reflex.jpgFostex FX120 Speaker in Bookshelf Sized DIY Bass Reflex Enclosure7424 viewsDIY Bass Reflex Speakers using the Fostex FX120 Fullrange Driver.

Related
DIY Fostex FX120 Bookshelf Bass Reflex Speaker Project
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Open-Baffle-Speaker-Fostex-FE206E-Eminence-Side.jpgFostex FE206E / Eminence Open Baffle Speakers - Side7371 viewsSide view of Keith's Fostex FE206E fullrange and Eminence speakers in an open baffle.
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DIY-Audio-Silver-Wire-RCA-Interconnect-Cables.JPGDIY Audio Silver Wire RCA Interconnect Cables7351 viewsSimple DIY interconnect cables made with silver wire.

Related: DIY RCA Silver Interconnect Cables
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Nanoo-LM3875-Gainclone.jpgNanoo - LM3875 Gainclone7348 viewsVery compact LM3875 chipamp with external power supply.

See the Nanoo LM3875 Gainclone Project page for more information.
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Seas_FA22RCZ_in_Open_Speaker_Cabinet.jpgSeas FA22RCZ Fullrange in Open Speaker Cabinet7289 viewsThis is a "open cabinet" speaker that uses a Seas FA22RCZ driver (200 mm (8") fullrange). As you can see, the cabinet is open as it has no bottom. The speaker system impedance measures like a poorly adjusted bass reflex box, while the frequency response measures similar to that of a closed (sealed) cabinet. There is no filter network used with the Seas FA22RCZ driver.

The sound is very clean, open and free of compression artifacts, similar to open baffle speakers. Nevertheless, it has a satisfying bass depth.

See my blog for more information. It is written in German but you can use the Google translate tool on the right side of the page.

Kind regards,
Carsten Bussler from Germany
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DIY-Fostex-FX120-Transmission-Line-Speaker.jpgDIY Fostex FX120 Transmission Line Speaker7288 viewsHere the Fostex FX120 fullrange driver is used in a DIY Transmission Line Speaker Enclosure. Fore more information, see the DIY Fostex FX120 Transmission Line Speaker Project.
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