| Random files - DIY Audio Projects |
Single-Ended 50EH5 Tube Amp417 viewsThis is a simple 50EH5 Single Ended Tube Amp that I built a few years back. Full details are available on the 50EH5 Single-Ended (SE) DIY Tube Amplifier Project pages.
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The Blue Velvet Tube Pre-Amplifier795 viewsMy second tube audio DIY project, The Blue Velvet tube Preamp by Dick Olsher.
The only changes from the original schematic is the use of a 6X5GT tube rectifier. This is an excellent preamp. The 6SN7 tubes by KENRAD gives deep lows and velvet mids - highs. Coupling caps are Mundorf Silver Oil 0.68μF.
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OP Amp Preamp - inside the case2060 viewsOn the test bench for a short run-in period. The lids off waiting for smoke. No smoke but on the first start there was a minor fault. I have been listening to the preamp for two hours now and found it adds nothing to the sound (as a preamp should) and extends control with volume and balance adjustment. The yellow caps are 0.47 uF polypropylene metal film. Full details are available for this project at: DIY Op Amp based Preamplifier Project.
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Large mains Speaker using the Lambda 12 TDs drivers 1713 viewsAt 2 foot square and 5 foot tall and 200 lbs. each, these mains produce some of the finest music I have ever heard. I've installed 4 Eminence 15" passive radiators in each cabinet resulting in a tuning frequency of 23 hz.
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| Last additions - DIY Audio Projects |
Fostex FE206E in Double Bass Reflex Speaker Enclosure4 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.Nov 20, 2009
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DIY PVC Pipe Speakers with HiVi B3N driver2 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
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DIY Vacuum Tube (Valve) Prototyping Bread Board8 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
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retro-thermionic Merlot Amp with JJ KT88 Blue Glass34 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
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