DIY Audio Projects Photo Gallery: DIY Audio Projects Photo Gallery - Last additions

DIY 6AS7 Tube Headphone Amplifier

Tue, 28 Feb 2017 22:16:43 GMT

My 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.
6752 views
Feb 28, 2017

4 channel, 400 W amplifier

Sun, 20 Dec 2015 15:10:14 GMT

This 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
5396 views
Dec 20, 2015

Dual SV83 SET Amplifiers

Sun, 20 Dec 2015 15:03:46 GMT

A 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, USA
5552 views
Dec 20, 2015

Push-Pull (PP) 6V6GT Tube Amplifier

Sun, 20 Dec 2015 14:54:32 GMT

This 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

4578 views
Dec 20, 2015

Decware inspired EL84 amp with attenuation

Fri, 20 Nov 2015 02:02:09 GMT

This is a Decware inspired EL84 power amp with attenuation. My twist was to make a it a EL84 SE UL (not triode). Also I upgraded the PS a little. One PS tweak was to use a Russian PIO 4uf cap as the first cap in the PS. Also the larger electros are all snubbed.

The inter-stage caps are Audio Note Tin foil, mylar and oil. The amp I called "Tamarisk" - just like how it sounds. The finished amp looks good and not too heavy. Sound is a big step up from my already great sounding 6V6 - Ozzie tube SE UL amp. On live classical every part of the music has a layer. There every instrument is heard in its own layer and decay, reveb etc also have their own layers.

Mark Houston â€“ retro-thermionic

Forum Thread: http://diyaudioprojects.com/Forum/viewtopic.php?f=9&t=5385

3321 views
Nov 19, 2015

6EM7 Single-Ended Triode (SET) Amplifier

Tue, 30 Jun 2015 00:08:17 GMT

"This amplifier is based on a tube intended to drive the vertical deflection circuits in larger televisions, the 6EM7. It has two dissimilar triodes in one envelope. One is a high gain, low power unit intended as an amplifier or oscillator, and the other is a higher power unit intended to drive the magnetic deflection coils on the back of a CRT. At audio frequencies the combination is just what we need to build a nice little audio amplifier. One tube per channel. And there are many thousands of these tubes and tubes like them readily available today."

Matt Renaud
Pacific Northwest, USA

Project Page: http://diyaudioprojects.com/Tubes/6EM7-SET-Amplifier/

Forum Thread: http://diyaudioprojects.com/Forum/viewtopic.php?f=9&t=5134

2715 views
Jun 29, 2015

6CY7 Stereo Amplifier

Mon, 22 Jun 2015 14:41:25 GMT

"This is a nice little low power stereo amp (1.3W/channel) based on the 6CY7 tube. The amp uses a Hammond power transformer and chokes and a pair of Edcor XSE10-8-5K output transformers. I have to say that it sounds really nice. There is just something about triode SE amps that nothing can beat. The peak clean power output is 1.3 watts RMS per channel (as determined from watching an oscilloscope). The 3dB frequency response is â‰ˆ48 Hz to 30 KHz."

Matt Renaud
Pacific Northwest, USA
Project Thread: http://diyaudioprojects.com/Forum/viewtopic.php?f=9&t=5222

2813 views
Jun 22, 2015

Class-D Sure-Electronics Amplifier

Tue, 16 Dec 2014 02:54:53 GMT

This 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 19â€ 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 â€“ retro-thermionic
2996 views
Dec 15, 2014

Class-D Sure-Electronics Amplifier (Inside)

Tue, 16 Dec 2014 02:54:27 GMT

Copy of Matt's SE 6V6 Lacewood amplifier

Fri, 03 Oct 2014 21:27:04 GMT

Hello,

This is my copy of Mattâ€™s (Suncalc) single-ended 6V6 Lacewood amplifier which is actually made from Sri-Lankan Satinwood, Padauk and brass.

Keith Graham Cheltenham, UK.

3317 views
Oct 03, 2014