Here's a link to setting up an eye-pattern type display on a digital Tektronix 'scope. http://www.tek.com/support/faqs/it-possible-display-eye-pattern-my-oscilloscope   You have an analog scope, and I am at a loss as to whether a similar result can be produced with one of those.   Edit: Now...

http://www.edn.com/design/test-and-measurement/4389368/Eye-Diagram-Basics-Reading-and-applying-eye-diagrams

I stand corrected. I misread your post and I apologize. I still stand by my opinion that unless you want to get into eye diagrams and dropped data you are wasting your time. If the voltage is not high enough to drive your DAC, you will know, because it will drop the connection to your computer...

I really hate to shoot you down like this, but I think you are wasting your time and money. There is so much more to USB signal integrity than the voltage at which the high and low states are at the end of your cable. You need to look into signal quality measurements to really get any idea of...

Hi Kim!   I have read a bit about your build of the SSMH and it seems you've had a great deal of trouble, I'm sorry to hear that. What are the key issues that you needed to resolve? You are the only one I've seen with cages around your tubes, Why is that? Why does it not go well with sitting...

Edit: *facepalm* ...so it was being reviewed. Fry this.. Sorry

Hi! I've been pondering the power supply for a 12AU7 build (got a hold of some new Philips tubes, anybody try those out?). I've found a cheap switched 48V 25W supply here in Sweden where I'm located. Does anybody have thoughts on putting that inside a case together with this amp? Major source...