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6DJ8 Tube Headphone Amp

By | November 26th, 2012|Categories: DIY AUDIOFILE|Tags: , , |

We are always on the lookout for good headphone amplifiers and here is a great simple tube design that will work with a wide range of headphones.  This tube headphone amplifier design comes to us from Bruce Heran.  The tube headphone amplifier is designed along the lines of the Oddwatt power amplifiers with the exception that this headamp does not require a driver stage. The headphone amplifier uses only one 6DJ8 tube per channel in a push-pull configuration.  All the circuit gain is in the single output stage.Read the full article

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Push-Pull EL84 Mono Block Amps

By | October 3rd, 2012|Categories: DIY AUDIOFILE|Tags: , |

 Mono Block Ultra-Linear Class-A Push-Pull EL84 Tube Amplifier Project

Recently Bruce has been enjoying his PoddWatt amplifier and the EL84 tube sound that he has revisited the original OddWatt amplifier project, tweaked it and put together an improved EL84 push-pull amplifier.  Like the previous EL84 projects the Mini Block amplifiers use a EL84 self-inverting push-pull output stage that is biased into class-A operation.  The big difference is that the amplifiers are built as mono blocks.

Mini Block Push-Pull EL84 (6BQ5) Valve Amplifiers

Interior – Mini Block EL84 Push-Pull Amplifiers

The input circuit is a 5751 SRPP.  The ouput uses the ultra-linear connection and output power was 5.8 W @ 2% distortion and less than 0.25%  at 1 W.  The measured frequency response was 10 Hz to 44 kHz within 0.2 dB.   Bruce reports that the Mini Blocks have slightly more output power than the Poddwatts and seem to have more detail while retaining all the good characteristics of the stereo Poddwatt amps.  Full details are available on the Mini Block Ultra-Linear Class-A Push-Pull EL84 (6BQ5) Valve (Tube) Amplifier Project page.… Read the full article

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Fostex FE206En Double Bass-Reflex Speakers

By | October 3rd, 2012|Categories: DIY AUDIOFILE|Tags: , |

Fostex FE206En Double Bass-Reflex Speakers

Fans of low power tube amps love high-sensitivity full-range drivers like the 200 mm Fostex FE206En and with good reason.  The drivers are relatively inexpensive, they sound good and they do not require a crossover.  The main reason for the fan fare is because of their high sensitivity (96 dB / 1 W / 1m), which makes them ideal for use with very low power amplifiers.  However, the high sensitivity and wide frequency bandwidth of the driver come at a cost – a very low mass paper cone and a tiny excursion (Xmax=0.8 mm).  This adds up to mean that extracting bass from the Fostex FE206En is often a challenge.Read the full article

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The New Tocaro 45D Loudspeakers!

By | September 17th, 2012|Categories: Austin Blog|

Announcing the arrival of the new Tocaro 45D Loudspeakers from Gütersloh, Germany!

We’ve been offering the Tocaro 40 Loudspeakers since 2008 (Austin Hifi is the U.S. importer and distributor), so naturally we were very excited to hear the new D-Series drivers (which are now standard-issue in The Tocaro 45D, The 42D and the 40D Loudspeakers.… Read the full article

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Beck’s Record Club: “New Sensations”

By | September 12th, 2012|Categories: Austin Blog|

Beck has been doing a cool project called Record Club for a while now. He gets some friends together in the studio and records a classic album, then releases a video of the performance on the internet.

This time out, Beck has rounded up St. Vincent and The Liars, plus a few extras and recorded the album “Kick” by INXS.

Other Record Club outings:

The Velvet Underground and Nico

The Songs of Leonard Cohen

Skip Spence – “Oar”

Yanni – “Live at The Acropolis”Read the full article

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JM Reynaud with Crimson Amps and Preamps at RMAF 2012

By | September 11th, 2012|Categories: Austin Blog|

The Abscisse, a terrific new loudspeaker by the renowned JM Reynaud is being introduced this year by JM Reynaud importer/distributor Bob Neill’s Amherst Audio.

Bob will also be playing the Crimson 710/640E-III preamp and amplifier (with Crimson Audio Cables, of course!) as well as the Cantata Music Center by Resolution Audio.

Amherst Audio will be in room 561 at RMAF 2012.

You can also visit Amherst Audio in Amherst, Massachusetts.… Read the full article

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DIY Stepped Attenuator Volume Control

By | June 26th, 2012|Categories: DIY AUDIOFILE|Tags: , |

The latest project to be added to the site is a DIY passive volume control which is made using a switched attenuator.  A stepped attenuator operates by switching to different resistors at each of switch settings.  The benefit of a stepped attenuator is that it can use low noise metal film resistors making them quieter than typical hot formed carbon and conductive plastic potentiometers.  The volume control uses a stereo 100k 24-position stepped attenuator which comes fully assembled for $18US from 8 Audio-Mall.  The attenuator uses 1% precision metal film resistors on a “make before break” multi-position switch.  A photo of the stepped attenuator is shown below. 
stereo 100k  24-position stepped attenuator
stereo 100k  24-position stepped attenuator
The stepped attenuator is housed in a small wooden enclosure with aluminum top and bottom plates.  A knob, RCA jacks and a 4 Pole Double Throw (4PDT) switch round out the DIY volume control.Read the full article

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Around the World with the International Space Station

By | May 7th, 2012|Categories: Austin Blog|

Click here to see a large version of this video!

I have mentioned the Astronomy Picture of the Day in a previous post.

This time, I wanted to mention an amazing video of the Earth that was shot from the International Space Station.

I noticed Italy and Sicily, then Egypt with the Nile Delta, plus several Aurora. There’s a page at Starship Asterisk where members have created a guide to what you can see in the video. I noticed a bright, orange squiggle that Starship Asterisk members identified as the India/Pakistan border.… Read the full article

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Found on Ebay: 1939 RCA Storytone Electric Piano

By | May 2nd, 2012|Categories: Austin Blog|

click images to enlarge!

Here’s something you don’t see every day: a 1939 RCA Storytone Electric Piano. The piano is listed on Ebay for $250,000, but there’s a “make offer” option, so maybe you could get it for less if you’re interested. It’s a real Art Deco beauty. The Piedmont Piano Company in the Bay Area has a nice page with some information and additional pictures of another Storytone Piano.

Here’s a recording of Earl Hines playing a Storytone Piano.Read the full article

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Rejection letter from Museum of Modern Art to Andy Warhol.

By | April 18th, 2012|Categories: Austin Blog|

 click image to enlarge!

 

I think this is a great commentary on the way things change as well as the way things never change.

Story here.

via PAPERMAG via This Isn’t HappinessRead the full article

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