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| 607 files in 8 albums and 1 categories with 5 comments viewed 2,484,473 times |
| Random files |
00139.jpgFinished, front view2791 viewsNow you know why it is named Blackbox, right?
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DIY-2SK1058-Class-A-Amp-Day.JPGSingle Ended Class-A Amplifier using 2SK1058 Mosfet6089 viewsOutside view of Sergiy's amplifier build. For more information, see the DIY Class-A Single-Ended 2SK1058 Mosfet Amplifier Project page.
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SynergyII-Cu-LM3875-Gainclone.jpgSynergyII\Cu - LM3875 Gainclone1424 viewsSynergyII\Cu started with 3.6kg of 100% very thick copper plate. The enclosure was selected, a 1U, 19" rack mount. The challenge was to build a pure Gainclone with its three resistors and simple 1500uF storage capacitors in a compact 1U enclosure. Everything had to fit in this tiny space including two 48VAC toroidal transformers for the dual mono supply, The LM3875 amplifier weighs 9.6 kg. The sound is clear, clean and solid with bass extended and very controlled.
See the original Synergy LM3875 Gainclone Amplifier (Chip Amp) project page.
Mark Houston – retro-thermionic
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Juan-ZCA.jpgZCA by Juan975 viewsGood day
I would like to add some of my pictures about my ZCA build from your site and I must say that this amp sound very good.
Regards
Juan
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Class-D-SureElectronics-Amp.jpgClass-D Sure-Electronics Amplifier96 viewsThis is my first DIY Class-D amplifier. The amp is based on a $30 Sure-electronics module. The amplifier modules requires only a 30VDC high current power supply because into 4 ohm it can produce 100Wpc. The enclosure is an off the shelf 2U 19” rack mount type. The power supply has an 18-0-18V, 9A toroidal transformer. A 10A rec bridge, some snubbing caps and 30,000 uF of stage caps make up the power supply. Two selectable inputs provide direct connection to the amp module or connection via an Alp pot and 4 Oz brass knob. Very crisp sounding with good detail... See the forum thread Class D 100W power amp for more information.
Mark Houston – retro-thermionicDec 15, 2014
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Class-D-SureElectronics-Amp-Inside.jpgClass-D Sure-Electronics Amplifier (Inside)101 viewsThis is my first DIY Class-D amplifier. The amp is based on a $30 Sure-electronics module. The amplifier modules requires only a 30VDC high current power supply because into 4 ohm it can produce 100Wpc. The enclosure is an off the shelf 2U 19” rack mount type. The power supply has an 18-0-18V, 9A toroidal transformer. A 10A rec bridge, some snubbing caps and 30,000 uF of stage caps make up the power supply. Two selectable inputs provide direct connection to the amp module or connection via an Alp pot and 4 Oz brass knob. Very crisp sounding with good detail... See the forum thread Class D 100W power amp for more information.
Mark Houston – retro-thermionicDec 15, 2014
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SE-6V6-Amplifier-after-Lacewood.jpgCopy of Matt's SE 6V6 Lacewood amplifier288 viewsHello,
This is my copy of Matt’s (Suncalc) single-ended 6V6 Lacewood amplifier which is actually made from Sri-Lankan Satinwood, Padauk and brass.
Keith Graham Cheltenham, UK.
Oct 03, 2014
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Beyma-12XA30Nd-Speaker.jpgBeyma 12XA30Nd Speaker457 viewsThese are the most expensive speakers I have made. Drivers are Beyma 12” with a titanium\polyester concentric 2” dome – 12XA30Nd. Efficiency is 98db\1W\1M for the woofer section and 105db for the tweeter. The drivers can handle 700W! Box is 33ltr and heavily braced with 4” rear port. Finish is heavily stippled and applied with a roller. Xover is at 2KHz. Bass is not super low and requires a subwoofer for better bass. Speakers work extremely well with my 0.5W 1920s tubed amp. See the forum thread Beyma, a Spanish coaxial driver for more information.
Mark Houston – retro-thermionicSep 25, 2014
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