There's an interesting article here on Science Daily about expectation affecting perception. The jist of it is that things tend to be like what you expect them to be like. The study used taste, but I believe you could easily substitute the sonics of silver vs copper wire for the taste of sugar...

I'm planning a low-buck P2P/Dead Bug scrappy Borbely Hybrid. The article is here: http://www.borbelyaudio.com/pics/405borbely2506.pdf It calls for dual power supplys for left/right of +-24V 100mA or +-15V 160mA and a third +6.3V 350mA (I'm planning on 700mA for both) for the tube...

I've got the tubes and MOSFETs for the Borbely Hybrid so I guess I better build the thing. The article is here: http://www.borbelyaudio.com/pics/405borbely2506.pdf Looking at the parts list on the last page, I'm trying to figure out what the heck "47R5" means for R5,R6. Also, I've tried...

I'm looking at the Hybrid Tube/MOSFET amp by Erno Borbely. There's an article here: http://www.borbelyaudio.com/pics/405borbely2506.pdf I'd like to do a low-buck point to point version. It looks like all the transistors and MOSFETs are tough to get. I've found them on specalty sites for...

What parts can stand to get a little old and dusty? Is it nuts to try to use a capacitor that might be 20 years old? I'm lucky enough to have some great surplus stores nearby. Lots of their stock is stuff that Uncle Sam probably paid a fortune for and then forgot to put in a rocket or fighter...

There is a quiet, but distinct (60hz?) buzz. I thought it might have been because I skipped the film caps just to see what would happen so I added them and it made no difference. Then I thought that the foot long bias test point leads might be an antena, so I made them much shorter. The buzz...