Stepping on toes, I know. The Grado 125, 225, and 325 (1999ish). They pined my ears to my head something horrid, I felt like my ear were in a vice. I liked the sound, they just hurt to wear. The Koss Portapro (1998ish) didn't pin down my ears as bad, shame the disc-man slipped and fell off...

O.K. I need to nip this one in the bud. In regards to My headphone amplifier I'm building.   Even tho my amplifier is designed to operate directly from 13.8V, I never intended it to be used any where other then at Mission Control (or similar facility). This was to save the waste of the...

They don't like the pictures from my site... O.K.   More of a "Mod", then a DIY build.   The ground strap thing, found an un-used "COM" spot on the PSU PCB. The blue caps are 1.0uF 250V, and the green ones (0.01uF & 0.047uF) 50V. All Poly.   That fixed most of the noise from the...

testing, 1, 2, 3... here is a link to the page with some pictures of what I did to the power in "LAB3".   http://www.zarcondeegrissom.org/comps/LAB3stuff.html near the bottom of the page.

I just tried posting something here, and I got a "Since your new here..." pop-up message thing, and I didn't get the rest of what it said before it vanished. and now where's my post? lol was it the link to a page on my site, or the pictures from my site? or is there a delay thing?   That...

[SNIP] there's my post, and in duplicate... Nice!

more of a mod, then DIY build. trying images first time... 12v2 snubbers, and added 8AWG GND strap. http://www.zarcondeegrissom.org/comps/LAB3stuff.html further down on the page.   Diner-mints on the Motherboard. Will void the warranty. also on that page.   This made most...

yep, and the confusion the 24-pin ATX connectors bring to consumers thinking there old 20-pin power supply will work... lol   I don't remember what era the 20-pin became 24-pin, it was after the yellow/black four pin (Caution Colors) plug became.   well as for 3.3V. Some one made a...

Fyi... -12V was (8088 ish) for the graphics DAC output, and some PCI sound cards/onboard sound chips require -12V.

I repeat... Quote: 3.3V = PCI, and PCI express... YES!, if the computer is new enough to have them. (Remember ISA, and 16bit ISA) lol 3.3V on other parts, Depending on age of the computer. The 3.3V used to power the older computer core stuff (CPU, RAM, possible chipset). digging...

I was exhausted, and I needed sleep. I don't want to hijack this thread, so I'll try to keep this short. (that didn't work) Quote: That makes sense, I saw that part of the schematic [PIMETA v1], scratched my head over the rather high value (thinking you were using the capacitive...

Quote: "O" that figures... lol. I should have looked at the PIMETA within the past few years. I recall that being a 1M ohm resistor, not a 499 kilohm & 4.7pF. O.K v2 vs V1   Akin to the ground channel in the PIMETA v1.0, [C1 on Figure 4 in the BUF634 datasheet]. 10pF or 4.7pF that is...