Archive for December, 2010

iPad Holiday Cheer (Video)

Happy Holidays to you and yours.


Friday, December 31st, 2010 Audiophile, Bob, Music, Video Comments Off

DIY Tube Phonostage Class at the Randall Museum by Ed Yang

Some of you may know that once a year I teach a DIY tube gear class. This time I’m offering a phonostage / phono preamps class. You will lean about RIAA equalization circuits and build one of my designs known as The Randall Phono.

I have subjected Randall Phono to a number of shootouts / comparison and it has always come out on top. It has a big tone with superb midrange, sparkling treble and solid extended bass. The sound stage is big without being bloated. Imaging is spot on where you can easily pin point the location of performers and instruments in space. At $196.00 for the class, around $350.00 in parts and 8 class sessions you take home a phonostage that is truly high end.

The phonostage you will build is the “passive” type based on the 6SL7 family of tubes, 5V4 rectifier with selectable cartridge loading. This is a medium gain phonostage so you can use it straight with 2mv and greater cartridge. If you use a low output moving coil cartridge (LOMC) you will need to use a step-up transformer (SUT). With a good SUT this phonostage have enough gain to accommodate LOMC as low as 0.14mv. The output impedance is around 30K so it should be able to drive most preamps or integrated amps.

This class is recommended for intermediate or advanced students. If you have taken any of the previous Randall Tube Audio DIY classes or have experience soldering, you are good to go. Even if you have never soldered but have good dexterity, then this class could be ok for you but contact me first. The class is limited to 10 students. This will be the only time I’ll offer the class so don’t wait till the last minute to register.

Class Announcement / Info:

Go to page 12 class #18824

Winter Class registration:

I think you can enter the class number on the search function. The class may not show up on the reg site until 12/18 but do check.

Museum Member registration:
December 11, 10 a.m.

General registration:
December 18, 10 a.m.

First meeting 12:30 PM Jan 8th 2011 in the Randall Room at the Randall Museum

If you have any questions email me Ed Yang at:

Monday, December 13th, 2010 Analog, Announcements, Audiophile, Events Comments Off

2010 BAAS Event Season Ends on an Analog Note

It’s been a great year for High-end Audio here in the Bay Area:

  • We once again got a local audiophile show, thanks to Dagogo
  • The pro’s were in town again, at AES 2010

    ampex redux

  • So were the tweakers and builders, at Burning Amp; and lastly
  • BAAS hosted a record nine events.

So it’s only fitting that we ended the BAAS year at Jason’s place, listening to fine analog through tubes and into elemental two-way loudspeakers.

The stars of the show (IMO) were the very-fine deHavilland 50A mono power amplifiers and

the other dehavilland

the very-capable Sonist Concerto 3 loudspeakers (all wood version). This coupling, while a bit small for Jason’s large listening space, simply made great music. They got out of the way and flat-out delivered. Great kit.

Also intriguing was the deHavilland Ampex-based 1/4″ reel-reel source. A turntable without pops? Maybe. But I’d just say that it’s a fine uncolored source.

Many thanks to Kara, Randy, and Jason – a memorable finis to a notable year.


Saturday, December 11th, 2010 Audiophile, Bob, Events Comments Off

Let It Be – The Video

Thursday, December 9th, 2010 Audiophile, Bob, General, Music, Video Comments Off

Blue Coast Records Hosts Invite-only Holiday Gig

On Saturday, December 11th, Blue Coast Records will host their annual, invitation-only “Blue Coast Artists
Holiday Party with the World” event in their Belmont, CA studio.

The gig will feature Keith Greeninger, Dayan Kai, Jane Selkye, Chris Kee, and a few other new artists performing live in the studio…and uploading the music to the internet in DSD and High Resolution PCM formats.

And BAAS has received a block of tickets! I’ll be there with a score of other BAAS members and special guests.

Sign-up emails have been sent. It should be great!


Wednesday, December 1st, 2010 Announcements, Audiophile, Bob, Events Comments Off
December 2010
« Nov   Jan »