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| 614 files in 8 albums and 1 categories with 5 comments viewed 3,179,530 times |
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Jan6814HPAmpIIAirsAnd_CownSmall.jpgJAN6418 portable Triode Headphone Amp MkII2204 viewsThe finished portable triode headphone amp/preamp on top of a pair of audio-technica “AIR” head phones and the Cowon S9 in front. This "out of the box" build of the Oatley electronics JAN6418 headphone amp / preamp has a delicious sound, is compact and quite unique. See other images. It may seem odd to be driving high-end headphones with a space age SS player (Cowon S9) with an amp which employs sub-mini valves developed for the military last century. But it sounds excellent. More information about this little tube kit is available on the JAN6418 Valve (Tube) Preamplifier / Headphone Amp Kit page.
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Digital_Pictures_1_033.jpgKT77 OddBlock close-up2535 viewsOddblock KT77 close-up view. Instructions for this tube amp project can be found on Bruce's KT77 Push-Pull Tube Amp page.
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Freds-Place-SAR-Labs-STA80.jpgListening Session at Fred's Place - April 20106373 viewsPhoto of the listening session over at Fred's place in April 2010. Components shown in the photo are:
SAR Labs STA80 KT88 Tube Amp with JJ KT88 Blue Glass tubes (top left)
OddWatt Audio DIY KT88 Push-Pull Monoblock Tube Amp Kits with Gold Lion KT88 tubes (bottom middle) put together by Gio.
The small speakers are from a Tang Band D4-1 DIY Back Horn Speaker Kit put together by Gio.
And the large Fostex FF85K Eminence Alpha 15A Open Baffle Speaker were built by Keith.
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Pioneer-PAX-A20-_fullrange-speaker.jpgPioneer PAX-A20 fullrange driver - 2.8 cu. ft Bass Reflex Cabinet5045 viewsThe speaker cabinets are built using plans from commonsenseaudio.com I have been busy with the 2.8 cu ft cabinet that I bought from them, now about 95% done. French Polished the outside and need to wait a few more weeks for the shellac to set-up before I can give it a final rub down and buff. The sound is absolutely fantastic, with Pink Floyd being top of the pops when it comes to Big response...
The driver is a sing;e vintage Pioneer PAX-A20 full-range driver and it performs remarkably well still. Well that is to my ears and others seem to agree.
The cabinets are made from 18mm MDF and skinned with 4mm cherry-wood ply, corner quadrants from Red Beech and Horns from White Pine - Kahikatea for ease of machining. The cabinets weigh about 25Kg each and the wadding is just normal household wall insulation, but I did put a layer of speaker-cloth over it and stapled in place to look like a bit of duvet.
Keith (Christchurch, New Zealand)
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DIY-6AS7-Tube-Headphone-Amplifier.jpgDIY 6AS7 Tube Headphone Amplifier3597 viewsMy name is Laurie. I have been building and DIYing for 45 years now and happily will never stop. This tube headphone amp is from a thread in the Form.
The power connecting cable comes from a European Travel Iron I bought for $1.00 at junk shop. (220v/6A) They will be shortened when I find a perch for the amp and me. The sound is better than my ears have ever heard so I will be keeping this one for my retirement entertainment should such a time ever come. Wink It has worked from day one and continues to please me every time it is turned on. The tubes are JJ ECC88 / 6AS7 with a 5V4 rectifier tube. To spite it's small size the parts are quite easily accessed. I over built most components so it will outlast me I fear. The only change I anticipate may be the 6AS7 to a bottle neck glass to match the rectifier tube. I do have and use a 6080 tube, but i can tell no difference in sound. It will take more then a few hours of listening to get my ears better tuned.Feb 28, 2017
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4-channel-400W-amplifier.jpg 4 channel, 400 W amplifier2835 viewsThis 4-channel 400 W amplifier uses Hypex UcD400HG modules together with the corresponding power supply.
The whole is mounted inside a Galaxy 330 x 230 x 80 case.
For building instructions, have a look at this project's wiki.
Two such amplifiers has been working for over 2 years in my lounge, driving Linn Komponent 110 loudspeakers which each have 4 speaker inputs.
Francois Corthay - Switzerland
Project Page: 4 channel 400 W amplifier using Hypex UcD400HG modules Dec 20, 2015
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E88CC-SV83-SET-Amplifiers.jpgDual SV83 SET Amplifiers2924 viewsA mirrored pair of SET amplifiers, presently being used in bridged mode. All P2P construction using silver solder. I included a "Hazen grid" capacitor and input tube bias change switch. The single mA meter displays individual output tube bias current with a Left/Right switch. Edcor XPRW178 power transformer and GXSE10-6-8K output transformers. Upgraded caps to Jantzen Audio 1200V Z-Superior. Upgraded resistors to PRP PR9372 Audio for metal film and TAKMAN REX for carbon film. ALPS Blue 100K attenuator. The power supply uses a RCA 5U4GB rectifier and Hammond 156R choke. Matched pairs of Svetlana SV83 for power and JJ E88CC for the input tube.
Billy Whiten - Georgia, USADec 20, 2015
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6V6-Push-Pull-Amplifier.jpgPush-Pull (PP) 6V6GT Tube Amplifier2402 viewsThis 6V6 amp was built following the DIY Push-Pull (PP) 6V6 / 6V6GT Tube Amplifier Schematic. Power Supply transformer and Output transformers are handmade in Argentina by NavasBaccino. I'd like to thank Brad S. for the help. The sound is amazing and clear, free of distortion.
Gabriel Rofrano, ARGENTINA
Video link
Dec 20, 2015
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