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| 614 files in 8 albums and 1 categories with 5 comments viewed 3,287,970 times |
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IMG_1480.JPGMaking the chassis, bottom view3277 viewsHere are the two pieces that make the chassis put together. Bottom view.
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DIY-Class-A-Single-Ended-Amplifier-2SK1058-Mosfet.jpgDIY Class-A Single Ended (SE) Amplifier with 2SK1058 Mosfet11122 viewsImplementation of Mark's DIY Class A 2SK1058 MOSFET Amplifier Project. It was difficult to obtain good 10W non-inductive wire wound resistors, so a 12V 20W lamp was used in place of the load resistors. Like in ZenLite Amplifier. :)
Here is a link to more pictures of the amplifier.
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Picture_024.jpg1930s style singled-ended pentode3917 viewsThis is a new amplifier I designed and built using mostly salvaged parts from British electronics of the 1930s and 40s. The valves are all British 4V types, AC/SP3 driver and N41 pentode output. The power supply uses an MU14 rectifier. The loudspeaker is a 1930s energized type - so it also acts as a smoothing filter.
See http://mike.wepoco.com/retro-geekery/wireless-world/1936-monodial-ac-super/monodial-psu for more information.
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Dons-300B-Tube-Amplifier.jpgDon's Compact 300B Amplifier2480 viewsDon has build this exquisitely compact 300B on one of his fine Spotted Gum bases. He uses ABS for the top plate with no bottom plate. He doesn’t believe in them. The 300Bs and 6SN7 are Chinese made “Electron Tube” – Shuguang . All components underneath are high-end. Though Don is on a pension he always uses the best passive parts but skimps on the tubes. The rec. tube is a Golden Dragon 5U4. The horizontal power tranni, OPTs and choke are locally wound by Dyne and are expensive. The best amp I have heard of Dons is his 2A3 which I intend to re-borrow. This amp is new and may improve with time but for now both the top end and bottom end are a little crippled. Mids don’t sound fast and slightly masked. BUT this may all change with time. It does play very loud though on a large 3 way Osborn Eclipse @91db efficient.
Mark – retro-thermionic
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DIY-6AS7-Tube-Headphone-Amplifier.jpgDIY 6AS7 Tube Headphone Amplifier4285 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 amplifier3334 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 Amplifiers3420 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 Amplifier2803 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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