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| 434 files in 8 albums and 1 categories with 5 comments viewed 709,393 times |
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Jordan-JX92S-Bass-Reflex-Speakers.jpgSmall Bass Reflex Speakers with Jordan JX92S Drivers1773 viewsA pair of small vented (bass reflex) bookshelf speakers. A single Jordan JX92S fullrange driver is used per loudspeaker. The Jordan is much better than Fostex drivers at producing bass and it does not need an expensive tube amplifier.
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DIY-HiVi-Tower-Loudspeakers.jpgDIY HiVi Tower Loudspeaker 1668 viewsSee the HiVi 3-way tower loudspeaker project page for full details of this speaker. Uses the HiVi F8 woofers, HiVi F5 mid-woofers and HiVi SD1.1A tweeters. Crossover is 2nd order at 500 Hz and 4000 Hz.
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IMG_2554.JPG50EH5/25EH5 Filament Reg. Power Supply703 viewsThis is the inside of the regulated power supply for the 50EH5 / 25EH5 tube filaments. It uses an LM317 voltage regulator and an old VCR power transformer that had just the right voltage and current ratings for the filaments of the 50EH5 / 25EH5 tubes. The output from the regulator is set for 20 some volts for the 25EH5's, and the unregulated DC is about 45V for the 50EH5's.
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KT88-Push-Pull-Tube-Amplifier.jpgMonoblock KT88 Push-Pull Tube Amplifier785 viewsPhoto of a KT88 Odd Block without the protective cage. This tube amp design will work with a number of octal tubes (KT77, 6CA7, EL34, 6L6GC, KT88, KT90 and 6550). SRPP driver stage using a 12SL7 tube. Output stage is a Class A Ultra-Linear SIPP with Gold Lion KT88 vacuum tubes. LM317 Regulators are used to provide the cathode CCS.
For more information, see the 12SL7 SRPP / KT88 Push-Pull DIY Tube Amp project page.
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IMGP2958~0.JPGLME49810 with ThermalTrak NJL3281D/1302D output devices20 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
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Tang-Band-D4-1-DIY-Back-Horn-Speaker-Kit.jpgTang Band D4-1 DIY Back Horn Speaker Kit35 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
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Dons6C33C.jpgDon's 6C33C tube amp from Down Under with locally wound OPTs69 viewsThis beautiful 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 trannies and chokes are well separated from the music making bits. He employed locally made horizontal power tranni, chokes and 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 – contributorMar 05, 2010
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IMG_3234.JPGK-12G tube amplifier kit - finished154 viewsBuilt the S-5 Electronics K-12G tube amplifier kit into an old Kenwood amplifier case. Finished product.Feb 20, 2010
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