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| 614 files in 8 albums and 1 categories with 5 comments viewed 3,179,818 times |
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Dallas-Back-Loaded-Horn-Speaker-Fostex-FE206E.jpgDallas Back Loaded Horn Foxtex FE206E Speakers7133 viewsPair of Back (rear) Loaded Horn Speakers using the Fostex FE206E driver. The drivers are modified with a custom DIY phase plug. The enclosure design is the Dallas by Ron Clarke. The cabinets were built by Keith.
For more information, see the Dallas Back (Rear) Loaded Horn Speakers with Foxtex FE206E thread on the forum.
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057.JPGsaba open baffle speakers7444 viewsThe system so far. Project Debut III with acrylic platter and Speed Box II, Cambridge Audio 640P phono stage, DBX 223 XL active crossover, Decware SE84C+ set amp for the mid/high freq, Trends TA 10.1 for the low freq, endorphine P-17 open baffle speakers with emminance Delta 15A and SABA greencone oval with Grundig 4" used for tweeter until the SABA tweeter arrives.
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Oatley_Electronics_K303_JFET_RIAA_Preamp_Kit.jpgOatley K303 JFET RIAA Preamplifier Kit3933 viewsThis is the second of the Oatley Electronics K303 two stage JFET phono preamps. I have built. The first build was in a "tinny" instrument case. The preamp sounded so good that I decided to construct another but this time in a heavy cast aluminum enclosure.
The K303 RIAA preamp kit comes complete with all required parts and a selectable 120/240V power supply. The RIAA section is all passive. The PS incorporates both a voltage doubler and a capacitor multiplier. The two different JFETs have been carefully chosen for their low noise and gain characteristics.
I have chosen a flame red epoxy enamel paint and separated the preamplifier section from the PS. The preamp is dead quiet and so far is the best sounding phono preamp I have built. At AU$30 for the kit, it’s a steal.
retro-thermionic
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DIY-Two-Way-Speaker-VoXDeuX.jpg3184 viewsUsing inexpensive components from the local electronics shop I constructed these small bookshelf two-way speakers. They comprise a 5” paper cone mid-woofer and dampened silk done tweeter. On the sides and back is wide internal vertical bracing and bitumanised heavy aluminum foil. This forms bass chambers within the box to control rear reflection. The passive crossover sits external to the speakers and is a Linkwitz-Riley 2nd order with a crossover point set at 3 kHz. The boxes and crossovers are bi-wired using Cat5 cable from the amp to driver. They sound excellent for an AU$350 build.
For more info, see the Simple and Cheap Two Way Speakers thread in the forum.
Mark Houston – retro-thermionic
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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 amplifier2836 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 Amplifiers2925 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 Amplifier2404 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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