WHERE: Randall Museum, San Fran
WHEN: Saturday 10 September 2011, 1:00 PM to 5:00 PM
WHAT: A meeting of the Vacuum Tube Users Group, VTUG
WHY: To hear D to A converters. Chris Boettcher has a new one.
There will be others. We will be listening to music.
If you have questions please email me at the address below or phone
me at 831-335-2655.
Daniel Norman
norman.dan@ieee.org
And here's more info from Chris (the presenter):
I auditioned the Anedio, the BelCantos, the Arcam, and a few others. All
of those were underwhelming although for the money, the Arcam seemed very
good. Then I happened upon the Music Hall 25.3 which is asynchronous USB
with a tube buffer stage if you use the unbalanced outputs. I was blown away
by it, and it is available for about $500. Best of all it is very easy to
modify it, which is what I will be discussing at the meeting. I am changing
out the opamps, and the power supply regulation and coupling caps. But even
the stock unit is really sweet. I thought that it might be an appealing
class project.
