DIY Audio Projects Photo Gallery
 NEW    Bruce Heran outlines the details and construction of his simple DIY 6DJ8 (ECC88) Tube Hi-Fi Headphone Amplifier Project.

DIY Audio Projects Photo Gallery


[ Gallery Home | Upload Photo | Recent Uploads | Most Viewed | Search ]

Last additions
IMGP2958~0.JPG
IMGP2958~0.JPGLME49810 with ThermalTrak NJL3281D/1302D output devices5114 viewsThis is a chip amplifier (chipamp) based on the National Semiconductor LME49810 high-performance, high fidelity audio power amplifier driver chip. The output stage is a conventional emitter following using ThermalTrak to achieve good thermal tracking.Mar 11, 2010
Tang-Band-D4-1-DIY-Back-Horn-Speaker-Kit.jpg
Tang-Band-D4-1-DIY-Back-Horn-Speaker-Kit.jpgTang Band D4-1 DIY Back Horn Speaker Kit5538 viewsThe fun and simple Tang Band D4-1 DIY Back Horn Speaker Kit. This little speaker kit comes complete with all the parts and tools required (minus a soldering iron). There is no cutting or finishing required (no saw dust or fumes!). The kit is very simple to build as it goes together just like ready-to-assemble furniture.

For a full review of this speaker kit, see: Tang Band D4-1 DIY Back Horn Speaker Kit.
Mar 10, 2010
Dons6C33C.jpg
Dons6C33C.jpgDon's 6C33C tube amp from Down Under with locally wound OPTs3432 viewsThis beautiful 6c33c amp is not one of mine but belongs to a regular customer of the electronics store I work at. The power tubes are the same used in Mig fighter jets as regulator tubes. Don has dropped one on a wooden floor, it bounced and he caught it. Tough tubes. The timber base is made by Don and the top plate is 4mm thick ABS plastic. The power transformers and chokes are well separated from the music making bits. He employed locally made horizontal power transformer, chokes and audio OPTs. The amp is musical and neutral sounding low bass is a little spongy and undefined when added to my all valve system. It produces 15W, not bad from a SET. The front tube is a Sovtek 6SJ7 and the amp is two stage and weighs 40lb! Mark – contributor.

See this 6c33c tube amplifier thread for more info about this tube.
Mar 05, 2010
IMG_3234.JPG
IMG_3234.JPGK-12G tube amplifier kit - finished5396 viewsBuilt the S-5 Electronics K-12G tube amplifier kit into an old Kenwood amplifier case. Finished product.Feb 20, 2010
IMG_3232.JPG
IMG_3232.JPGK-12G tube amplifier kit build4816 viewsPhoto of a S-5 Electronics K-12G tube amplifier kit which has been built into an old Kenwood solid state amplifier case.Feb 20, 2010
PB220014.JPG
PB220014.JPGPCL86 Single-Ended Amplifier4062 viewsSingle-ended amplifier using PCL86 triode / pentode tube

web: http://www.bartech.rulz.hu/
e-mail: kisskozsa@freemail.hu
Feb 14, 2010
6L6-5881-SE-Valve-Amp.jpg
6L6-5881-SE-Valve-Amp.jpgSingle-Ended (SE) 6L6 / 6L6GC / 5881 Valve Amp3596 views6SJ7 or 6SD7 (pentode) driver stage. 6L6 or 5881 output stage (Sovtek 5881WXT shown). Solid state power supply, DC heaters.

OPT covers are made from copper clad board and enclosure is aluminum.

See the DIY Single-Ended (SE) 6L6 / 5881 Tube Amplifier project page for more information.
Feb 08, 2010
6L6-5881-SE-Tube-Amp.jpg
6L6-5881-SE-Tube-Amp.jpgSingle-Ended (SE) 6L6 / 6L6GC / 5881 Tube Amp4539 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.
Feb 08, 2010
2120128885_d5fb1fe01d_b.jpg
2120128885_d5fb1fe01d_b.jpgRetro tube amp Telefunken EL11 & EF12 + Tungsram AZ113345 viewsNice sound from years before word war II of 20th century.

see the forum: My "Retro" tube amplifier (EL11, EF14, AZ11) for more information.


Feb 02, 2010
DIY-6V6-Push-Pull-Tube-Amplifier.jpg
DIY-6V6-Push-Pull-Tube-Amplifier.jpgDIY 6V6 Push-Pull Tube Amplifier3278 views6V6 push-pull tube amp with Hammond 1608A audio output transformers. 6SL7 input and GZ34 rectifier. See the DIY Push-Pull (PP) 6V6 Tube Amplifier Schematic for full details. Dec 21, 2009
PeerlessSeas2way~0.jpg
PeerlessSeas2way~0.jpgPeerless and Seas 2-way Towers in Zebrawood5262 viewsThe fun part about building these speakers was the crossover design with a Zobel and Baffle Step Compensation (BSC). I wanted to try a larger driver than a 6.5 inches. I am really pleased with the sound and image. Unbelievable sound for the cost. The crossover uses open air inductors and Solen capacitors. The Veneer is Zebrawood adhesive backed. I was able to match the grain on both sides and the fronts. One coat stain and finish followed by paste wax. The speakers are drying in the garage awaiting the living room. Next is a pair of open baffle 3 way with active cross using DIY chip amps.Dec 13, 2009
KT88-Monoblock-Tube-Amplifiers.jpg
KT88-Monoblock-Tube-Amplifiers.jpgDIY Monoblock KT88 Push-Pull Tube Amplifier Kits2753 viewsShown in the photograph are a pair of DIY Monoblock KT88 Push-Pull Tube Amplifier Kits. See the review for additional details of this great sounding tube amp kit. Also shown in the photo is a NAD C521i CDP used a transport and a Behringer SRC2496 which is being used as an up-converting DAC. The little black box is a DIY Lightspeed (optocoupler) Attenuator.Nov 30, 2009
MongrelChamp.jpg
MongrelChamp.jpgFender Champ 5F1 valve guitar amp.2898 viewsMy build of the Fender Champ 5F1. It is a SE three stage tube amp based on the 6V6 power valve and 12AX7 triode. The amps were first made in the late 40's up to early 80's. And re-issued in 2006. The original schematic had valve rectification. I added a 10H open choke. There are only two inter-stage caps and one by-pass cap on the 6V6 cathode resistor (not counting PS caps). I went for a Classic Champ sound by using cotton covered, single core, tinned copper wire as the hook-up wire, bees wax (Jupiter originals) inter-stage caps, an original Ozzie made 12AX7, Ozzie 5Y3 and 6V6 Black Glass (original). PS caps were increased from 8uf to 47uf and an effects loop added (between stage one and stage two). I didn't install the NFB loop from the OPT secondary to stage two. Instead I made the output stage UL (Edcor tranny). The amp is stable even when over-driven heavily. When hooked-up to a Pioneer PA 12" driver (4" Al/vented dust cover) it sounds excellent. Very clean highs and gutsy lows.Nov 30, 2009
dsc_0987.jpg
dsc_0987.jpgDIY Open Baffle Speakers5778 viewsRemoving the most detrimental factor to sound quality - The Box!

Tweeters: 4x Hivi K1
Midrange: Seas L21 RNXP
Woofers: Jaycar CW2119
Nov 25, 2009
DSCN0061_M1~2.jpg
DSCN0061_M1~2.jpgMy Black Velvet OTL headphones amplifier 2840 views6AS7G RCA & Rare RV200/600 Tungsram-Germany & PCC88 Siemens /golden pins/
OTL for headphones 200 and more ohms. Loftin-white, only 1 cap ELNA between output stage and headphones.
Nov 23, 2009
Fostex-FE206E-Double-Bass-Reflex-Speaker-Enclosure.jpg
Fostex-FE206E-Double-Bass-Reflex-Speaker-Enclosure.jpgFostex FE206E in Double Bass Reflex Speaker Enclosure5744 viewsThis is the simpler enclosure recommended by Fostex for their high sensitivity FE206E drivers. The large magnet and basket spokes of the driver have been covered with bituminous damping. The upper chamber has sound deadening vinyl across the back and the rest of the upper chamber has double layers of thick Dacron lining it. The boxes are fastened using dowels, glue and wood screws. A Speaker Zobel / Impedance Equalization Circuit is used across the driver terminals. The sound soundstage is pin-point sharp and with good depth. Bass is sufficient without being heavy. For under $AU500 these speakers represent very good value. With a sensitivity of 96 dB/W my 6 W Ultra-Linear Single-Ended valve amps can produce a high sound level.

For full details see the Fostex FE206En Double Bass-Reflex Speaker project page.
Nov 20, 2009
reds.jpg
reds.jpgDIY PVC Pipe Speakers with HiVi B3N driver6033 viewsThe speaker enclosures are made using various PVC pipe sections. The PVC pipe enclosure houses a 3-inch HiVi B3N fullrange driver. The enclosure is tuned through bass port at the end of the pipe stand. Binding posts are on the back. The frequency range is about 80 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 Full Range Speaker project. Nov 20, 2009
DIY-Vacuum-Tube-Prototype-Bread-Board.jpg
DIY-Vacuum-Tube-Prototype-Bread-Board.jpgDIY Vacuum Tube (Valve) Prototyping Bread Board3881 viewsA simple DIY Vacuum Tube (Valve) Prototyping Test Board used to test single stage tube circuits.

See the DIY Vacuum Tube Prototyping Board post for additional details.
Nov 19, 2009
MerlotJJSGallery.jpg
MerlotJJSGallery.jpgretro-thermionic Merlot Amp with JJ KT88 Blue Glass3098 viewsNot meaning to hog the Gallery at the moment but lots of development underway with my Merlot KT88 SE UL valve amps. I'll make it short: This is the Merlot amp with matched a pair of JJ KT88 Blue Glass. Sound: weightier bass and sharper mids but the JJs are only hours old.Nov 10, 2009
KitAmpTopSmall.jpg
KitAmpTopSmall.jpgKT88 SE UL Tube Power Amplifier2610 viewsI had put the partially finished amp in the gallery some weeks back. Now finished not a lot of difference on the outside except for the many silver colored screws on the top plate and some feet. See the other image for the underside shot. After a number of hours of careful listening and listening to it though others CD players, pre-amps and speakers I can say that most liked the sound. SE tube amps produce absolute and exquisite mid-range and silky highs and deep sound stage but this amp has a slightly narrow sound stage presentation. Bass improved and hum vanished with additional PS filter caps. With a brushed Al top plate and Mirabue timber thick timber base, Edcor XSE OPTs and component-2-component wiring on all circuit boards (including rectifier broard) this amp represents a clean and easy build with in-expensive parts. Though low powered (6W+) for a few hundred dollars you can experience the benefits of a tube SE UL design. So easy, so nice!

Here is a link to the KT88 Single-Ended (SE) Schematic I followed.
Nov 01, 2009
614 files on 31 page(s) 10


DIY Tube Projects :: DIY Tube Amp Kits :: DIY Speaker Projects :: DIY Solid State Projects :: DIY IC / Opamp Projects :: DIY Phono Projects :: DIY Cable Projects :: HI-Fi Audio Schematics
© diyAudioProjects.com - Terms of Service - Privacy Policy